The Cube - How to Make High Voltage Power Supply w Flyback/Builtin Diodes

[@RimstarOrg]

The How-I-Made the Cube high voltage power supply video is up now! Enjoy! PS. +Aaron Monroe pointed out in the comments the resemblance to a borg cube. Good thing I didn't think of it otherwise I would have made a cheezy clip of it flying through space, sparking away. :)

[@MongrelShark]

Is it to heavy for ion propulsion on your test rig?

[@RimstarOrg]

Mongrel Shark Oh, yes. Even just the plastic Enterprise model with the laser in it was getting a bit on the heavy side.

[@MongrelShark]

Shame. If you had a bigger enterprise to counter balance. They could chase each other in circles.

[@pojntfxclassics3132]

My flyback weights 440 grams with everything:D Is ist possible to add about 2250 lifters to it, power it by this power supply (on top of it) and fly it? I`m just dreaming about starting an orbiter with this (powered by xenon gas in space) :D

[@RimstarOrg]

PojntFX (PFX) No, the power supply wouldn't be able to supply enough current for all the lifters to fly. The current is needed to ionized the air for the ion wind. The record is one that lifted 102g of payload plus the 85g lifter and used a heavier power supply that had multiple flybacks.

[@uK8cvPAq]

I love the lower power arcs off of this sort of driver, much safer than some of the others out there.

[@benjaminbadrakh1644]

However, the problem is that the output is DC voltage. A high frequency high AC voltage at 30000v will be more safe than 1000v DC.

[@CoolDudeClem]

Nice build! If you have the time, try using a ZVS driver instead, it gives better output and the transistors dont get as hot.

[@RimstarOrg]

***** I'm no zvs expert but I think zvs drivers use MOSFETs instead of bipolar power transistors like the 2N3055.

[@WildfoxFabrication]

yeah they do

[@ozymandiasking173]

theres a similar circuit to the zvs that uses bjts. I think it was called royer oscillator. Ive not yet built this circuit yet so i dont know if it runs cool like a zvs; it might be more prone to overheating, i dunno. But it definately seems to give similar results as a zvs with long, powerful arcs from what ive seen online. Do you know what the drawbacks of this circuit? Any tips or advice you might have for me regarding this circuit would be much appreciated. Side note: I love your channel. its one of my very favorites for getting inspired and ideas for what my next project will be. Your spark gap tesla coil videos helped me so much with understanding how to tune my sgtc and because of that finally got it to perform to my satisfaction. Thank you so much for providing the resources i needed to finally getting past that hurtle (i cant spell for shit). I hope you will consider in the future doing a video showing how to build HV supply for powering larger tesla coil transformers with the spark gap design. thats my problem currently. The arcs are 32cm which is awesome but theyre really weak and are barely visible with the lights on. My power supply is one i made thats a 555 timer pwm that drives a single mosfet to pulse DC thru the primary and the output of the flyback secondary can be varried with a variable resistor that controls the duty cycle of the pulsed DC. It works great but it isnt able to provide enough power to get the optimal performance from my circuit. It takes half a second to charge my cap bank to the voltage needed to jump the spark gap and results in breakout thats long but only present for short moment with half second pauses between each strike and is not bright/thick enough to be visible unless its a dark room. phew! sorry for long, long expo and question but im stumped and i figured youd have good advice to point me in the right direction.

[@milanhlavacek6730]

@@ozymandiasking173 i think the circuit in this video IS royer oscillator.

[@ozymandiasking173]

@@milanhlavacek6730 it's very similar

[@zacharysauve2136]

I've watched dozens of videos on how to make a driver circuit for flybacks, most would show a neat diagram then present a tangled mess of wires.. I almost gave up until watching this, Thanks!

[@RimstarOrg]

Glad I could help! In case it helps even more, I've also since added a schematic to my webpage about it rimstar.org/science_electronics_projects/high_voltage_power_supply_w_flyback_transformer_builtin_diodes.htm.

[@happycline]

very nice & easy to follow tutorial! though I have no use for it myself (yet) it was still great to watch :)

[@RimstarOrg]

A tutorial like this is had to make be nice and easy, so I appreciate knowing it worked. Thanks!

[@PyroTronix]

You should connect a resonant capacitor in parallel with the primary coil. The arcs will be much hotter and powerful. But will pull a lot more amps. So instead of BJT's you should use mosfets way more efficient. BTW great video and explanation. Keep it up👍

[@ankanpradhan9724]

In my experience mosfets are more sensetive to high amps and volts......And that way I blew 4 mosfets when I was making a zvs driver circuit

[@mcclainschilling6419]

I was literally looking for a video like this two days ago :O, thx so much!!!

[@legendK.D]

I have used a ac flyback ( ozone transformer high frequency one ) and got unbelievably 30000 volts 20 ma arcs by using a ne555 driver circuit with only 18 v 10 amp input and now with a voltage multiplier...i am getting nearly 1 million volts ... it was such a huge success to me ... After some time the voltage multiplier broke because the voltage from the ac flyback transformer was too high than my voltage multiplier could handle... its a monster.. wow 😊

[@babelcomm4236]

Awesome! Mr. Rim! Thank you.

[@crnazvijezda]

Thanks Steve! Some other time try schematic I sent you link. You can use flyback coils for primary and feedback just with short measure and search and you only need transistor (use hor defl trans from TV) and 2 resistors. I connect 12V or 24V and sometime 36V (three batt) - output is proportional and for higher input need to be in oil.

[@RimstarOrg]

Thanks Tomy. So many things to try! :)

[@muddymuddymuddmann]

SWEET VIDEO. So how would this work for a tesla coil power supply? and What would be a safe power output for the cube in this usage? Thanks. MUDDy

[@johnkerley4152]

Would I be correct if I am thinking that the transistor bases are getting about 2 volts when the transistors are turned on? If so, then, are they being turned off by the same amount of voltage in opposite polarity, or is the opposite polarity higher in voltage during the magnetic collapsing period?

[@johnkerley4152]

The circuit I am talking about worked well when it was widely separated before it was put in the box.

[@johnkerley4152]

I also wonder if raising the emitter/collector voltage would raise the output voltage,....or if it is more of a power issue?

[@MuraliMadupu]

Thank you for ex lent demo of the project. Very use full for electronic project making students

[@power-max]

Will you someday show how to make a singing arc or plasma speaker? I am currently making one, it is pretty cool!

[@RimstarOrg]

Power Max Someday. A plasma speaker is on the todo list but a Tesla coil is my priority - well, other than smaller projects done at the same time to keep the flow going. Got a neat fluorescence almost ready for Friday that's about something neat I discovered in making last week's video.

[@johnkerley4152]

I'm sorry to go on so long as this,but I wish I knew how they got that primary and feedback inductance calculation!

[@johnkerley4152]

I wonder if the frequency that this cube is running at is actually 15.38 MHz? When you are showing the oscilloscope in the video, the scope looks like it suggest that the frequency may be 15.38 MHz, but it has a "?" after it. I know it is supposed to be a DC output,but perhaps it is a high speed pulse existing in the DC?

[@RimstarOrg]

John Kerley It was guessing at all sorts of frequencies, nothing specific or real. The 125 Hz ripple I show after that at 20kV is real though. It's common with output from a multiplier circuit to have ripple on top of the DC output.

[@FungSit]

Another awesome video, thank you Rimstar

[@timh.2137]

Wait a minute here in this set up isn't your variac the power supply and the cube a multiplier or step up transformer?

[@RimstarOrg]

I've never thought of it that way. You could say that the whole thing is the power supply, it just happens to be broken up into two pieces. I have another homemade power supply which is made up of three pieces that I refer to as the variac, followed by a low voltage power supply which then feeds a high voltage power supply. But then again, I have another commercially made power supply which has those same three components but they're all hardwired together and so I just refer to it all as a high voltage power supply.

[@johnkerley4152]

I know that in your design that you probably don't have to worry about primary coil back EMF getting back to the power supply...as the coil is fed from center tap. But if someone was to use the original flyback primary and it is not a center tap fed situation, do you think back EMF would get back to the supply,and if so what would be the best way to prevent it?

[@sorsorscience0787]

omg is that a baby jacobs ladder! It’s so cute lol! I need one now lolz

[@arnislacis9064]

You can also drive flyback transformer with slaye exciter circuit just wind primary on the core of transformer & connect HV rtn. wire to the base of transistor & it works.

[@ozymandiasking173]

Gaming with Arnis dude, fucking for real? That works? thats fuvking crazy i gotta try that. does is give decent performance? can u upload a vid of it?

[@弘睿甫]

Hi, are there any specifications I should look for when selecting a fly back transformer? Or will any fly back do the trick ?

[@RimstarOrg]

Sadly, I don't know of any specifications for the flyback.

[@johnkerley4152]

I have found that running a flyback by its original coils is not feasable with the lower voltages because you would have to put more current on the primary than it was intended to take normally.

[@johnkerley4152]

On the bright side,....the hand wound coils do work,....it is puzzling though that when feedback was crossed, I tried to detect the magnetisum with a screw driver and could not tell that there was any!

[@johnkerley4152]

I made a simple flyback circuit the other day from one of those other plans that uses the original primary and feedback from the flyback,but when it was on, I could not measure the current going in to it without the meter going haywire. I assume this may have been because i did not have the secondary Earth grounded. Do you think that might be the cause? The meter can measure volts or amps up to a frequency of 400 Hz. I know that the frequency of the flyback is running much higher, but exactly how much,I can't guess. I know that in a TV it would have been 15750Hz.

[@johnkerley4152]

Do you know if you would have to ground either of the two pins at the bottom that come from the focus or screen,.....I guess thats where they come from?

[@RimstarOrg]

John Kerley I'm not familiar with the pins you're referring to. I am familiar with the focus and screen outputs on various flybacks. I leave them alone since I don't have need of those outputs.

[@9speedbird]

So, you are supposed to connect a positive lead of the 24V DC powersupply to the red binding post?

[@RimstarOrg]

9speedbird Yes. Make sure it's the red binding post and not the red one that I'd put black tape on.

[@9speedbird]

RimstarOrg Haha, thanks

[@mrsilentb0b]

would it be possible to build this using triode vacuum tubes instead of transistors? and is there a video you explain why you choose which resistors and wire size you use?

[@RimstarOrg]

+Nathan Shaw I don't know if it would be possible to use triode vacuum tubes instead, but that would be an awesome project! As for the resistor sizes, I just used the same circuit as from my 30kV power supply (but without the multiplier) and I think that originally started from here jnaudin.free.fr/html/lifterb.htm.

[@annelieseocallaghan801]

You're wonderful! Carry on with your amazing videos!

[@johnkerley4152]

I am trying to get a good understanding of the flyback itself andalso the multiplier. I know somewhat how each is made,but it seems that when it is running and hooked to a multiplier,that there is some things about the ringing going into the multiplier that is quite complex. It also shows that pulse DC can be transformed to back EMF inside a transformer and thereby be transformed just as AC can.

[@aussienature2360]

SUPER CORONA DOPE .oh year that sounds like the good stuff

[@MrChickenPicker]

It looks like you're using both stranded and solid core wire for the primary windings. I have some stranded 18 awd and solid core 24 awd wire on hand. I also have some solid core 1mm diameter copper enamel coated wire. Could this be used instead of the 18 gauge stranded wire? Does it matter whether the wire is stranded or solid? How critical are the wire diameters? Have you experimented with enamel coated wire for the primary windings?

[@RimstarOrg]

MrChickenPicker It doesn't matter if they're stranded or solid. If you can't use the size I'm using then just go with the largest size that you can fit. I've used enamel coated wire and it worked.

[@davidprock904]

Can you do the Water Bridge Experiment , and bring a flame up to the Bridge and see what the reaction is?

[@johnkerley4152]

Actually,I am unsure if there is a back EMF ringing,or a series of quick back EMF spikes.

[@johnkerley4152]

I don't know too much about oscilloscopes right now, so I can't determine if there could be something to that or not.

[@harukoyama9515]

I am trying to build a power supply with all diy part except the FWB... May I ask below capacitor geometry questions? Bigger the roll (bigger diameter) make higher capacitance. More surface contact to + and - leg make higher Amp capacitor. Does longer the cylinder roll make higher DC voltage? In another word, more chubby person make more capacitance. More nurve, more waking person make higher Amp. Does taller person has higher volt?

[@RimstarOrg]

In this video I talk about capacitance kzbin.info/www/bejne/fafIemydja6mftk but you'll have to search online for the formula for a spiral capacitor since you'll be needing a very high capacitance. In fact, you'll probably be needing to make an electrolytic one like this kzbin.info/www/bejne/o52VhZeHZ8Rlo80 and this kzbin.info/www/bejne/op65h5eMbdyoeJI but I don't know how long it will last. In this video kzbin.info/www/bejne/g4GnaKahj52CidE. I talk about the capacitor voltage rating (breakdown voltage).

[@kenw.1112]

VERY NICE!!! I LOVE THIS GUY'S VIDEOS THEY ARE AWESOME AND HE KNOWS HIS STUFF ! NO DOUBT HE IS ACCURATE IN THESE VIDEOS! LOVE IT! THE TRANSFORMER HE SHOWS IN THIS VIDEO IS A IHVT. INTEGRATED HIGH VOLTAGE TRANSFORMER WHICH INCORPORATES THE HI VOLTAGE RECTIFIERS AND FOCUS/SCREEN POTENTIOMETERS AND MAYBE SOME BUILT IN FIXED RESISTORS. AWESOME VIDEO NO DOUBT. GOING TO BUILD THIS BECAUSE I ALREADY HAVE THE PARTS ON HAND. THANK YOU FOR SUCH A EXCELLENT VIDEO DUDE!!!! I was wondering about using the drive windings on the IHVT to drive the flyback instead of wrapping windings on the ferrite core? In the TV/monitor circuit the mfgr has a horizontal output transistor that has around 117vdc on the collector which is driven by a horizontal driver transistor through a horizontal driver transformer. This is a easier circuit and doing it the other way is much more involved. YOUR METHOD IS BETTER, SIMPLER AND SIMPLY AWESOME!! Another thing about the DC output from the flyback. It is non-filtered DC . The picture tube acts like a filter thus raises the hi voltage up higher so you won't be able to produce the same level as the anode hi. V. Lead hooked up to a CRT. CAN'T WAIT TO BUILD THIS. I WANT IT TO IONIZE. THE AIR.

[@AryanGuptatheguywhorocks]

Does the cube provide enough thrust to fly an ionocraft?

[@RimstarOrg]

I've tried it and no, it doesn't make a lifter fly. I thought it would but maybe the fact that's its output is pulsed DC instead of flat DC is the problem, but I'm really not sure. I would have expected it to work.

[@johnkerley4152]

Did you use solid core wire? Because I thought that that would be what to use,but I can't get it to work and I can't see any mistakes.

[@RimstarOrg]

John Kerley I used a mix of stranded and solid, but just because that's what I happened to have and it's what fit. The black 18 AWG 5+5 turn one is stranded and the red 24 AWG 2+2 turn one is solid.

[@johnkerley4152]

When the ones you have turn on, can you hear them ring?

[@Elecifun]

Hello Is is feasible for me to use TIP35C's instead of the 2N3055's ? I have built the circuit using 2N3055's but don't get a spark at 12v. I am a little nervous about turning up the juice. ....I am editing as I go along. I turned up the power and saw current flow but no spark. I shut off the power and heat tested components finding transistor two (looking at your circuit diagram, left to right) very warm. I have made a mistake, but will wait until tomorrow to find it, as I am 3 drinks in now ;-) Thanks for the great video's

[@RimstarOrg]

MonkeyMagic Elecifun As far as I can tell from comparing the datasheets the TIP35C should work. You can minimize the risk to your hardware by putting around 240 kilohms of resistance (rated for 2 watts or more) in line with either the ground side of the spark gap or the HV side.

[@Elecifun]

RimstarOrg Thank you for the advice. I have an issue. When providing power Q2 warms up to quickly at low voltage (7v) so I disconnect. The only difference with our circuits is that I do not know my flyback negative pin as yet and so it is not connected to negative. Also I have used two 1 watt 56 ohm to get the equivalence of 28 ohm for the 27 ohm resistor. Any thoughts please.

[@RimstarOrg]

MonkeyMagic Elecifun My Q2 heats up quickly too, but at around 20v input. Make sure you have a good heat sink. The lack of ground may be a part of the problem but I can't swear to that. Here's a tip from Alex1M6 in the comments to this other video of mine (kzbin.info/www/bejne/gZOTiKqpf8yHg68): "Add a fast recovery diode across each transistor with the cathode to collector and anode to emitter; BJT's are rather vulnerable to negative going voltages on their collectors. For further protection use small film capacitors of around 10-47nF across each diode too and this will shift the transistors into quasi class E switching and can even reduce the heating of the transistors slightly. Larger value capacitors will reduce the output voltage slightly but will also reduce transistor stress, so experiment before finalising the value."

[@Elecifun]

Hi, Thank you for your help. I setup the flyback on my TIP35C based driver found the negative and then added the flyback back to 2N3055 circuit connected the negative and it works :-). I will now add the diodes and capacitors. Will two IN4937's be ok? Again many thanks.

[@Elecifun]

RimstarOrg The film capacitors did reduce heating of the transistors but using the 47nf and 22nf film going above 16v killed transistors. I found so far a 10nf ceramic to be the best jacobs ladder performer, although the transistors got warm they survived.I have only tested to 10nf ceramics so far. I have killed 4 out of 5 2n3055's experimenting and will have to wait for more to continue. I might try some MJE13009's as I have some and see what happens ;-)

[@justdaveitoffenburg7047]

are this voltage from the flyback transformer very dangerous???

[@RimstarOrg]

+David Aklanov I would call it dangerous, yes. It could burn you. It certainly wouldn't be pleasant if it took a path through your heart and would be worse for someone with a heart condition.

[@ethankarvelsson1901]

i am wondering were did you get the resistors and the capacitor?

[@RimstarOrg]

+ethan Karvelsson They came from some local electronics stores here in Ottawa, Canada. But you can find them online too.

[@gabrielheredia5148]

Does this push out more then 20 amps? Thanks!

[@RimstarOrg]

Gabriel Heredia I haven't measured the output current, but the answer is no anyway. At most it's output is in the low milliamps. The input to the power supply that I measure at 7:12 in the video is 20V x 3.8A = 76 watts. Even if the output voltage is only 1000V, that would be a maximum output current of 72W / 1000V = 0.076A, roughly. Higher voltage would be even lower current.

[@johnkerley4152]

I had wanted to try your method as it seemed that an external coil could carry much greater current than the internal coil.

[@ahmadnab7969]

Could this idea some how be modified to produce induction heater?

[@RimstarOrg]

No, this is the opposite of what you'd need. This produces high voltage, low current output whereas you'd need some form of high current output. That's not something I've worked on myself.

[@taziksh7564]

Is this enough voltage for the ionocraft?

[@RimstarOrg]

My lifter requires 25,000 volts. This power supply doesn't put out that high enough voltage. For my lifter, I used a few different power supplies which you can see at the bottom of my webpage here rimstar.org/sdprop/lifter/lifter.htm . However of a different design or a smaller ionocraft, it might work.

[@aliazazy1857]

Hello Does it work on the Slayer Exciter device

[@cisarvialpando7412]

Why didn't you use ZVS Driver ?

[@rapsod1911]

Can you make video of scope trace while j. ladder is on?

[@ameristanbouli5063]

Hi .. Can i use it to make ionocraft ? Are the voltage and current enough ?

[@RimstarOrg]

It didn't work for my ionocraft. I suspect the voltage was too low.

[@ameristanbouli5063]

Ok thanks ^^

[@johnkerley4152]

I wonder if my flyback core is too large,it is 5/8 x 5/8 in. cross section area., it came from a 36 in. TV?

[@bobertfunfunfun405]

Ok so, what is a high voltage power supply exactly? Is lit like a generator that makes electricity, since its called a power supply?

[@RimstarOrg]

From the point of view of whatever the load is that's plugged into it, it supplies power that's at high voltage (up to 20,000 volts in this case) compared to the voltage from your wall socket (120 volts or 220 volts depending on where you are.) In this video one of the loads is the jacob's ladder, which needs high voltage in order to create the arc between the two posts of the "ladder".

[@johnkerley4152]

It seemed like I had got the drawing off of a schematic from somewhere but I could not find where it came from. It was not your fault,,,,I have seen that you show it correctly.

[@guilhermedantas7636]

i háve a question, how do electic devices work, because i have two motors, if i spin them one generates 17 volts and the other 80, but the one that generates 90 cant run a circuit of lightbulbs while the other with 17 volts can, isnt the bigger the voltage the bigger the current??

[@aftabahmadlodhi7619]

+Guilherme Dantas go and study some basic the bigger the voltage lesser the current be according to the relation Vs/Vp=Ip/Is both the current and voltage are inversely proportional to eachother

[@bottlekruiser]

That's true for constant power. If the power limit is neglgibly big then it's Ohm's law I=U/R.

[@paullovelace7818]

Are there any basic safety concerns with creating this? I've always been afraid of flyback transformers due to the pop when grounding out and the staggering voltages they produce.

[@RimstarOrg]

Paul Lovelace Oh, yes, this one is dangerous. Make sure you turn it off and use a grounded stick like I was using to discharge the power supply before going near it.

[@terryhayward7905]

Way back when I started my career in electronics, I pointed to a flyback transformer lead connecting the EHT in a TV, and had a spark jump to my finger, The burn took weeks to heal. Yes it is dangerous Old TVs used to run with an EHT voltage of 28Kv. The very early TV sets used a mains energised EHT transformer, that was not only dangerous, that was LETHAL.

[@balanbogdan9160]

You can make a HV power supply from flyback transformer and CFL lamp circuit?

[@RimstarOrg]

Probably, but I don't have any circuit for doing it.

[@johnkerley4152]

I had planned to find out if higher volts input would increase voltage out,but, that is inconclusive now,...however, I kind of think it just depends on input wattage now.

[@pmz558]

I was wondering if u can make a simple inverter (dc to ac)

[@johnkerley4152]

The output arc was still up to 1.25 in., when I had the circuit strung out on the bench. I never got to measure it when it was in the box. This was just wire to wire.

[@midunmahmudin1185]

I would like to ask, when I try, why when the source is connected to the circuit, its voltage drops, what causes it? thank for answer.

[@RimstarOrg]

midun mahmudin I don't understand. What do you mean by the source?

[@midunmahmudin1185]

RimstarOrg My point is, I had a 19.5 Volt DC source, when I connect to the circuit (the cube), I became a DC source voltage drops to just 4 Volt, why is it happening?

[@midunmahmudin1185]

midun mahmudin Please answer my question sir, thanks...

[@RimstarOrg]

midun mahmudin When you put a load on a source (i.e. the cube is the load) then the load draws current from the source. That causes the voltage at the source to drop. But as long as the load keeps getting the amount of current that it needs then that's okay. The same thing happens with a battery. When you put a load on a battery, the battery voltage drops. When you turn off the load, the battery voltage gradually returns to normal. You don't see this happen in my video because when I turn on the source and see the voltage on the meter, the cube is already there as a load. The voltage you're seeing on my meter is the already dropped voltage. I never show the voltage without the cube. PS. I have to be awake to answer your question. It's morning here. Patience. :)

[@midunmahmudin1185]

thank you sir have been willing to answer my questions, but when the voltage drops do not occur electric spark on the circuit that I created. about why it happened. I hope you do not get tired of answering my question

[@johnruscigno5738]

Pretty good arcs for a homemade power supply. I have to ask you though, have you tried using a 12 volt halogen ballast? You get huge yellow arcs.

[@RimstarOrg]

Nice. Nope, these are the only arcs of this sort that I've produced. Usually I'm producing sparks.

[@vicentiomihalache4315]

This flyback so I can utilisare to make a lifter?

[@RimstarOrg]

Are you asking if this one can make a lifter fly? If so, I don't think so. In my experience I've needed around 24kV to make a lifter fly. I measured only 20kV with this flyback and transistors. If I turned the voltage up higher then the transistor very quickly heated up and I had to turn it off.

[@johnkerley4152]

I also suspect that the resistors play a part in the frequency....because I could hear the ring. I had not accounted for that when I was planning that experiment.

[@youssefsifi5398]

with this power supply puts out up to 40,000 volts DC if the input was 48 DC?

[@RimstarOrg]

I don't know how it scales. But I also mention in the video at around 7:53 that any higher than 20,000 volts output and the transistors heat up too fast.

[@balanbogdan9160]

You can make plasma electrolysis?

[@michaelt3172]

Would a 14V 1000MA DC model train transformer work for a tesla coil?

[@RimstarOrg]

No, you need high voltage, in the thousands of volts.

[@ElianoDi]

Hey Man, I made the circuit as oer your design, but it isn't starting. Can you suggest some advices ?

[@RimstarOrg]

ElianoDi Check all you connections, make sure they're good and that they're correct. What did you do as your first test? What are you using to power it?

[@LieWizard]

Thanks. You make the coolest stuff.

[@deathmagneticx383]

Hi, if i have a flyback like that, means i can't use a tripler like in your 30kv power supply? Thanks.

[@RimstarOrg]

DeathMagnetic x Yes, that's my understanding. The diodes that are attached to the flyback mean the tripler wouldn't work. Unless you can somehow remove the diodes. I've never tried.

[@deathmagneticx383]

RimstarOrg Good news!!. I found a flyback without the diodes it's very similiar with the one you use in your other power supply, but your flyback have 2 connection points and mine has only one with 9 terminals. My cuestions are, can i use any of the 9 terminals to connect the flyback with the 4700uf capacitor? and, how can i identify the primary and the feedback in the flyback? Thanks for your answer. Greetings!!

[@RimstarOrg]

DeathMagnetic x The flyback in my other power supply has a bunch of connection points, but I have the documentation for it so I could tell which ones to use. Try searching online for the model number on your flyback, if there is one. Otherwise do a search for "flyback transformer pinout" to find instructions on how to determine which pins to use. As for the primary and feedback, I always wind my own.

[@deathmagneticx383]

RimstarOrg Mmm i see. Well, in your video you call it "Flyback connection point 2" i suppose that's the 0v pin connection of the secundary, am i wrong? And also, in my flyback i did the 2+2 turns of de feedback (only than i did with 22 gauge), but in the primary i only did 4+4 because the size of the flyback, does that make much difference? Sorry for asking you so many questions, but it's for a school project and i want everything to be perfect. Thanks for your time.

[@RimstarOrg]

DeathMagnetic x Yes, that's the 0v pin connection of the secondary. Also, 4+4 might still work. It may mean a lower voltage on the output since you'll be inducing less of a magnetic field into the core. On the other hand the lower induction may mean the feedback may not have enough energy in order to turn off the transistors and get the cycles going. You'll have to try it and see. You could also look for smaller gauge wire or wire with thinner insulation if it doesn't work out. BTW, don't forget to use the around 240 kilohm, 2W of resistance on the output to protect your power supply from big sparks. And I also added some more (optional) protection parts in red on the schematic on my page rimstar.org/equip/30kv_pwr_supply.htm.

[@johnkerley4152]

I was going to try an experiment to make the flyback work on higher voltage power supply by using either 440 ohm with 40 of the ohms divided off or 430 ohm with 30 ohms divided off so it would work with my 26V power supply. But I can't get it to work,even after putting jumper connectors to reduce the ohms back to 260 with 20 divided off....I know that is not exactly what the original plan was,but,it's pretty close,...it was just the way the resistor bank was that determined that amount.

[@raiden5452]

How did u learn to do this I'm 17 and want to get into this type of stuff did u go to collage learn it through someone please tell me :-D

[@RimstarOrg]

I have no formal education in electronics or science - other than high school physics class. Read lots of books, look at videos and websites, and most importantly, try stuff out. That's what I did. Start simple and add to your knowledge as you go along. Or, if you want to make a career out of it then study it in college.

[@sorsorscience0787]

lmao same Im 13 and working on a tesla coil. The power supply is going to be the hardest partz

[@greenthizzle4]

Sor Sor Science07 just put an add on Craigslist requesting free microwaves.. or look in the free section of craigslist.. if it has to much or to little power you can actually rewind it if you want

[@stuarthaddox2585]

I'm 33 and I only started getting into electronics and circuit design two years ago. My professional background is in biochemistry and I was a baboon when it came to electronics. Though a thorough understanding of math is helpful, reading and a genuine love of learning is all you need, as well as patience and perseverance. There are tons of free resources out there, including KZbin, MIT free courses, electronic_tutorials.ws, etc. You can start by reading and interacting with other people online, as well as scavenging old consumer electronics if you are not able to purchase parts online, like I was when I first started. You can't go wrong with an engaging hobby, it will bring you genuine satisfaction and it will keep you out of trouble. I didn't even know how a transformer worked two years ago, and I just built multiple types of Tesla coils and a high quality audio amplifier. Follow Rimstar.org, as well as Great Scott and Electroboom for quality entertainment with very clear and concise explanations, and don't underestimate yourself.

[@name6440]

Will it work as induction?

[@RimstarOrg]

No. I'm no expert in induction heating but this doesn't ave the current for that.

[@ashishezhuva8916]

Sir what is the code number of the flyback transformer you have used???

[@RimstarOrg]

It was a random flyback from a randomly found TV. Pretty much any flyback you find on ebay.com will work. From writing that was on the board near the flyback transformer it said T505 and clearly it was a Sony flyback. From www.tvserviceparts.com/Sony_Transformers.html it's Model KV32FS12, Version T505, Part Number 1-453-338-21. The KV32FS12 might be the Sony TV model number. The 1-453-338-21 is the part number, maybe just for that website. An alternative part no looks like it might be Sony part 1-453-338-11

[@AbhilekhPandey]

Can I still use a voltage multiplier with this configuration if I want higher voltages ?

[@RimstarOrg]

Almost. The problem is that the diode that's built into the flyback turns the output from AC to DC and a multiplier needs AC. If you can find a flyback without a built in diode, or find a way to remove it, then you can, but they're hard to find and I'm not sure they can be removed.

[@AbhilekhPandey]

Found someone who has manages to open one : www.angelfire.com/oh3/ebjoew/Flyback.html

[@RimstarOrg]

Thanks! That looks easy enough to remove. The one's I've seen were all encased in epoxy.

[@AbhilekhPandey]

Another quick question, If I somehow manage to remove the diodes and capacitors and connect it to a voltage multiplier of my own, will I get a full DC output from the thick main wire only or should I connect the focus wire with it as well ?

[@RimstarOrg]

Hmmm... In my experience the focus is at a lower voltage, usually 1/3rd the voltage of the thick wire. They're separate voltages, taken from different stages of the multiplier circuit for different purposes in a TV. You'd use only one of them at a time, unless you want two different voltages at the same time for different things.

[@arbaazshirani9045]

Hello sir Actually I want to know that how do you know how much no. of turns around the ferrite of flyback . Is there any calculation...? For the no. Of turn

[@RimstarOrg]

No calculation. It's just a number that seems to be used by most people and works. Good question though. Maybe there is a better number to use.

[@arbaazshirani9045]

@@RimstarOrg hello sir, one more doubt for regarding Tesla coil. I have seen in your video that you have used dc power source for your Tesla coil but I have search many times on Google to know which type of power source is used for Tesla coil it shows neon sign transformer which is work on ac power source then I am confused so please clarify me what type of power source is used and why

[@RimstarOrg]

The power supply feeding a Tesla coil can be either AC or DC, both work.

[@R2NOTU]

What's the frequency is it adjustable ?

[@RimstarOrg]

I don't know the frequency and I don't know if it's adjustable. Sorry.

[@daveandrews6670]

I like your videos,I can learn from them.Is this flyback safer than a MOT to power a Tesla coil,I hear MOT,s are a bit dangerous.Is this powerful enough for a Tesla coil. Thanks

[@RimstarOrg]

Yes, this flyback is safer than a MOT because a MOT can output both a high voltage and a dangerously high current. This power supply can still hurt you but comparing the two, it's safer than a MOT. As for powering a Tesla coil, looking at the times at which you posted your comments, you probably don't realize it but you've already seen it powering my Tesla coil in my Tesla coil video kzbin.info/www/bejne/ZoTEdoONlM6AfJo (this is the link for the whole playlist so you can see all the options).

[@johnkerley4152]

I am curios as to why you have the 4700uF in the circuit,because I was thinking that the power supply would already have something like that in its output. But I was thinking that maybe the capacitor has to be close to the circuit due to the Hz of the circuit. Is that why you put it there?

[@RimstarOrg]

John Kerley I understand how a flyback circuit works but I don't know the purpose of the 4700uF capacitor. It isn't present in a lot of flyback circuits. I think I got that circuit originally from here jnaudin.free.fr/html/lifterb.htm, but the link on that page from there onward doesn't seem to have the circuit anymore.

[@johnkerley4152]

RimstarOrg On that page,they also show 10KV,500pF on the output of flyback before the tripler. One thing I noticed was on the scope picture of flyback output I saw Ch1=5uS,f=40.81KHz,V=12.5KV. I guess maybe that was the frequency that the flyback was running at? Max output would be 12.5KV.

[@johnkerley4152]

RimstarOrg I had to go back and look at the page again to make sure I had said it right,......it was 41.81KHz.

[@johnkerley4152]

RimstarOrg I guess the 5uS was the scope screen capture time.

[@RimstarOrg]

John Kerley I never noticed that 10kV, 500pF capacitor there before. My guess is that it's for blocking any DC from the flyback going to the tripler.The 5uS and 5kV look like the horizontal and vertical grid sizes respectively. That makes sense since it's saying the frequency is 41.81kHz and each wave roughly takes 5 grid blocks across and 5x5uS=25uS. 1,000,000/25 = 40kHz. Also, the 5kV makes sense since it seems to be saying the maxium peak from 0V is 12.5kV and each peak from 0kV is 2.5 grid blocks high and 2.5x5kV=12.5kV.

[@johnkerley4152]

I have been experimenting with a 32V system that uses the original flyback primary and feedback coils but when it establishes an arc it causes the digital display of the power supply to go off. I can measure the input current, however, with an analog meter,and it is @900mA. This makes me think that primary coil back EMF is going back against the power supply. This worries me because I am thinking that the supply output would have a capacitor across it and it would probably be an electrolytic capacitor,and I am thinking that this could cause it to explode!

[@RimstarOrg]

John Kerley I read your questions carefully, but as I said before, I've never worked with an unmodified flyback, so I don't have an answer. Maybe someone else does but I don't know how many are looking in.

[@RimstarOrg]

John Kerley John, thinking about it a little more... Does your problem happen with just back EMF or does it happen when there's a long, bright sparks. If it's sparks then maybe I can help.

[@johnkerley4152]

RimstarOrg The factory bought power supply is a 32V,5A with digital V and A readouts. It will make the flyback work but when it is working the digital displays turn off. However, I have an analog milliameter also hooked to it and it says that the input is 900mA while the digital displays are turning off. The adapter is 32V,1560mA, but when I tried to run the flyback from it,it just turned off before I even saw one single spark and I did'nt even hear the flyback ringing either. I found out later that the adapter still worked after being unplugged and plugged back in later. I am sorry for being impatient. What I was wanting to know was if the flybacks primary coil was causing a back EMF if it would be a problem if that got back to an electrolytic capacitor that would be most likely (I imagine)on the output of an adapter right after the bridge rectifier....although it may be made intirely different than I am thinking...such as having,instead one of those ICs...ect.

[@johnkerley4152]

John Kerley Oh,I forgot to say that the digital displays turn off during sparking only.

[@muhamadtaupikhidayatullah7945]

can I use this HV Power supply for making ESP??? please tell me,i think my ignition coil output is AC HV so the smoke still pass :( (fyi : i use ignition coil from reguler car)

[@johnpacheco750]

good day to you . i follow your diagram. and its working but have low spark, because of the of the arching electricity in the corona of flyback transformer. i already put a ground wire and a insulator varnish but still electricity is still arching. can you help me what can i do? or what varnish can i put. thank you for your time.

[@RimstarOrg]

+john pacheco I'm assuming you mean you have arcing at the pins like I show at 2:33 in the video. If there are any sharp edges involved you can try smoothing them out. If you did any soldering there, make sure the solder is rounded like a ball with no sharp points. Making everything involved rounded is the best first step. If you do that then you will need less varnish. Be careful not to damage the pins. Sometimes they come out easily. The thicker the varnish the better, so add more layers of varnish. Different varnishes have different breakdown voltages but the manufacturer doesn't tell you what it is. A good material to use is called "Corona Dope". I show this at 3:28 in the video. It is designed for this purpose. You can also put varnish on wherever the arc is going to. At 2:33 you can see it is arcing to part of the structure, so you can put varnish there on the structure too.

[@johnpacheco750]

+RimstarOrg thanks for the advise i will try to follow your instruction. many thanks and more power.

[@johnkerley4152]

I have one flyback that does run by internal coils,but,it is only outputting @9KV,due to keeping it at its normal operating current.

[@vishalgaikwad1439]

Sir I've used 220-12v 50w ballast to drive my BSC25-T1010A flyback transformer but I got a very little arcs not even an inch arcs. What's would be the problem sir I really need help please help me.

[@RimstarOrg]

I'm not familiar with ballasts so I can't help you.

[@BulletProofCupid7]

Will the regular computer power supply do the trick? I mean, will it handle "The Cube"? I have two 12V outputs there which provides 14A and 13A respectively. Thus according to first Kirchoff's law if I join these two together I will get 24V that can handle 27A total (..aye? pls, correct me if I'm wrong :D). I just salvaged an old flyback transformer from my really old CRT TV and I don't have a variac. Sadly I lent my multimeter to my friend, hopefully I'll get it back tommorow and test this stuff out!

[@RimstarOrg]

BulletProofCupid7 In the video I show it running at 10V and 1.9A so I imagine 12V at 13A or 14A should work. The output voltage will also be on the lower end of what it can do, which may of may not suit your needs.As for connecting them together, I'm not sure if you can do that with power supply outputs. To get higher voltage you'd connect them in series (positive of one connected to the negative of the the other), but the current won't increase. To get higher current you'd connect them in parallel (positives connected together and negatives connected together), but the voltage won't increase. So you can get either higher voltage or higher current but not both. The problem is that at 12V you already have plenty of current with just one output so there's no need for two of them, whereas if you combine them to get 24V then the power supply's transistors will heat up too fast. At 20V I found they heated up too much within 30 seconds.

[@BulletProofCupid7]

RimstarOrg If 10V gave around 10kV(?) then 12V will be totally enough for me :) Also is there a linear tendency? Will I get 5kV if I apply 5V on the input? Thanks for help! Also, I'm just curious, why this additional coils on the core and all that circuitry? I've seen videos of people who were looking for HV and power pins on these things then just plugged those into 24V power supply and got huge ammounts of voltage on output with ease where no circuitry or additional coiling were necessary. Just the transformer and 24V input.

[@RimstarOrg]

BulletProofCupid7 The only recording of input voltage and current to output voltage is what I have in the video. I haven't made a note otherwise. Regarding why the coils and circuitry, I can't speak for using the pins instead since I haven't looked into it or tried it. Obviously they should work since they are used in monitors and TVs for the same reason. Just another way of doing it I guess.

[@abhaysane5796]

I am curious ....... If I connect this supply to a smaller resistance like say 1k, will it supply the 20A (20kV/1kOhm) continuously or will it burn out at that high current?

[@RimstarOrg]

Do you mean at the input to the high voltage power supply or at the output?

[@abhaysane5796]

At the output of the supply. I wanted to know if it can supply the calculated current continuously.

[@RimstarOrg]

Abhay Sane Oh, I see what you're asking now. I read your question too fast. No, it can't supply that amount of current. I had some problems measuring current with two different analog meters. With the continuous arc, one meter showed over 250 milliamps, which was the most it could show. My other meter showed 0 with a continuous arc. So I don't know what the current is exactly with a continuous arc. With sparking, I got around 2 amps on the meter that could show it. That leads me to think that the continuous arc is limited to less than 2 amps. I don't know what the voltages were for the above current measurements but it doesn't matter since I noted only the maximum currents, so it is much less than 20 amps.

[@abhaysane5796]

Aah ... ok. I am trying to figure out what I need for a pulse generator. I want a high voltage (around 1 kV) across an electrolyte which has a resistance of around 100 Ohms. This would give a current of 10A. All power supplies have a maximum output current in the datasheets which is a lot lower than 10A, I think the output voltage might drop if my load tries to draw more than the rated current, but I can't find a good reference book or website that mentions it clearly. Thanks for replying though!

[@isaacthomson683]

What current does the flyback output?

[@RimstarOrg]

Donna Sutherland I don't know, I didn't measure. It would also depend on what you do with the output since that's that determines the current.

[@jordiyaputra8359]

Great tutorial, sir. I want to build one too.. Can I use one TIP 3055 as the transistor and 2200 uF 35 V capacitor, and have the resistor with higer wattage? will it work nice?

[@RimstarOrg]

Comparing the two datasheets www.onsemi.com/pub/Collateral/TIP3055-D.PDF and www.onsemi.com/pub/Collateral/2N3055-D.PDF they're practically identical so it looks like the TIP3055 is mainly just a different packaging of the 2N3055. You should be able to use the TIP3055 instead. You'll still need to attach it to a heat sink like I do in the video. For the 2200uF capacitor, I don't know if 2200uF will be enough. You can use two of them in parallel to get 4400uF, to get closer to the 5000uF. The 4700uF one I use is a very common part and should be easy to find. I've even found them inside electronics that I've taken apart. A higher wattage resistor is okay. It's going with lower wattage that would be a problem.

[@jordiyaputra8359]

RimstarOrg Thank you, sir.. I've gathered nessesary component for the wiring. But now I have a problem.. I have an adaptor with output 12V and 1.5A. Can it be used?

[@RimstarOrg]

The current's too low. See the video at 7:08.

[@ミロ-i6k]

does it matter what TV or CRT you get a flyback? are the pin-outs easy to identify with simple testing? I'd like to cut the costs of my project (demo Farnsworth fusor) by making a transformer with 10kv-15kv instead of buying one. Besides the case - how much would a project like this cost?

[@RimstarOrg]

Camilo Guerra It has to be a TV that has a cathode ray tube. I don't know if plasma and other flat screen displays have flybacks in them for other reasons. Other than that, it seems that whatever flyback you find inside will work. If the flyback has a part number on it then you can search for it online and often you'll find the specifications with the pinout. If that doesn't work then there are many videos on youtube showing you how to figure out the pinout using a meter. I can't say what the cost of my cube power supply was since it was made entirely from stuff I already had, much of it taken from other things. For the transistors and resistors, the cost is less than $20.

[@ミロ-i6k]

RimstarOrg Thank you for the thorough response! BTW, Fantastics Videos!

[@ミロ-i6k]

RimstarOrg Another question… what kind of variac are you using? I'm looking to buy one and was wondering what the amp spec actually means. what would be the difference in one variac with lets say 120v output with 50-60hz cycles and one is 5amps and there other 10amps? (I'm new to all this electronics stuff, so i apologize for what might be a very dumb question)

[@RimstarOrg]

Camilo Guerra Sorry for the delay... had to wait for a chance to open up my variac to double-check. The amp spec is the size of the fuse that's on the input side i.e. on the side of the plug that you plug into the wall for power. Mine is a small one but does the trick for all the stuff you see in my videos. Still, if I could find one with a higher amp rating I'd go for it. Mine doesn't say who makes it: just a model number SC-3M and Made in China. Here's an excellent video on variacs by my friend Todd kzbin.info/www/bejne/emLNkoebq796jdU

[@Shirinnikhat]

We know voltage is around 10kv to 20 kv but, What is output current of color TV flyback transformer? Which gives 20kv. Any value, approximate range?

[@RimstarOrg]

The current depends on your load but have a look at the video at 7:11 and you'll see that at 20kV, the current is 3.8amps.

[@Shirinnikhat]

RimstarOrg But sir, 3.8 amp is input current I think. I want to know output current? I found many other sites, some says 5mA some says 20mA and some says above 100mA. I want approximate range of output current. Please reply me sir.

[@RimstarOrg]

I don't know the output current. That's harder to measure. Keep in mind that the output current depends on what you're using it for so that's probably why the sites you looked at gave different answers.

[@VitoMiksa]

I know its been a few years, but i have a question. When i plug it in the wall (im using a laptop charger, 19V 3.5A) i get a momentary spark and then it just stops until I plug it on again. Do you have any idea why would that happen? Great project btw!

[@RimstarOrg]

I can't say for sure but a guess would be that your power supply is drawing too much current from you charger and something in your charger is detecting it and shutting off for protection. And thanks!

[@VitoMiksa]

@@RimstarOrg do you maybe know how can i lower the current needed, or should I just buy a new charger? If so, what current rating should it have? Thanks for the reply.

[@RimstarOrg]

If you watch the video at around 7:05 you'll see me make measurements. For what I was doing, making an arc, it looks like your charger has a good range. But as I said, I was just making a guess at what might be your problem. You could try connecting some meters, measuring the voltage and current between the charger and your high voltage power supply to see what's happening.

[@VitoMiksa]

@@RimstarOrg ill do that, thank you :)

[@CREVchannel]

Is it possible to power this with a modified ATX Power Supply? Mine can give 12V and run up to 13 amps.

[@RimstarOrg]

You can't make the high voltage power supply from an ATX power supply, but you can at least power the high voltage power supply which I make in this video using the ATX power supply as the low voltage input.

[@CREVchannel]

@@RimstarOrg Yeah, I will use the 12V output as "The Cube's'" Vin and I should get about half the output you got right? If you put 24V in and got 20kV out, I should get around 10kV out from 12V in.

[@RimstarOrg]

I put 20V in and got 20kV out. However, I don't think it's as simple as multiplying by 1000. I don't know what the relationship really is of Vin to HV out.

[@CREVchannel]

@@RimstarOrg Could this also be used to power an ionocraft or lifter? How much voltage does it take?

[@RimstarOrg]

No, I tried with my lifter and it didn't work. It could be the voltage since my lifter requires around 25,000 volts. I don't know how much current my lifter requires but it's also substantial, probably close to or higher than one milliamp. The easiest way to power a lifter these days is using an old PC monitor like I do here kzbin.info/www/bejne/qGSVlmOHfMmgbrc or to buy one from www.amazing1.com/ It has to be a DC high voltage.

[@gregthatcher919]

could you please do a video on how to center tap, I'm honestly a really big fan and I try to make everything you do but I can't seem to understand how to center tap, thanks!

[@aghast2495]

if you strip a section of the insulation in the centre of the wire, then wrap the one end of a second wire around that a few times. Then put some flux on it and solder. Electrical tape the soldered connection.

[@RimstarOrg]

Sorry, I missed your comment somehow. But my answer is the same as what +Aghast said.

[@gregthatcher919]

+RimstarOrg thank you soooo much, your channel is so awesome!!!

[@peterobayanju]

Nice tutorial but i tried it and followed all circuit layout, but when i am to test it i couldn't get a PSU so i plugged to direct light source and the wall socket burnt immediately, what could be the likely problem please, i actually need it to build a mini ESP

[@RimstarOrg]

The Cube needs DC as it's input whereas the current from your wall socket is AC. If the socket burnt immediately then there's a chance you also damaged something in the Cube too, but maybe not. You'll need to find a DC power supply. In this video about making my 30kV power supply (kzbin.info/www/bejne/fXbYfGSFmb6rfs0) I show using wall adaptors (it's near the end of the video). That power supply is almost identical to the Cube so you can try that too.

[@peterobayanju]

@@RimstarOrg Okay, thank you very much sir, i will check it out but the link is not going, and could there be a way to convert the AC from the main socket to DC that can feed the Cube

[@peterobayanju]

and i could not get a 4700microfarad 35v capacitor, so someone suggest a 2200microfarad and 50v, will that work also

[@RimstarOrg]

It looks like KZbin included the closing ')' as part of the link. Try this one kzbin.info/www/bejne/fXbYfGSFmb6rfs0 The relevant section starts at 6:01. Regarding using 2200 instead of 4700, that might work, I can't say for sure. If it doesn't then you can always try two 2200microfarad capacitors by connecting their positives together and their negatives together. The 50v rating is more than the 35v and is fine. It just means that the capacitor can handle more voltage.

[@johnkerley4152]

Is'nt the tripler built into this flyback?

[@RimstarOrg]

John Kerley There isn't a tripler but there is a diode of some sort. I don't know exactly what parts since I don't have the schematic for it. There might be a capacitor too, given how smooth the output is. Together they may make up a single stage Cockcroft-Walton voltage multiplier. A tripler is a 3 stage Cockcroft-Walton voltage multiplier. I'm guessing only a single stage since the voltage is so "low" compared to what it would be with 3 stages.

[@jessieangeles7468]

IS THIS a low budjet electricity?if yes i try to make this one...if no its fine...

[@RimstarOrg]

That depends. For me it was low budget because I had a lot of the part collected from over the years, some of it from scavaging from old things I took apart and some things I'd bought cheaply. But if you're starting from scratch and buying everything then it can cost a bit. The most expensive part would be the flyback transformer if you have to buy it.

[@jessieangeles7468]

@@RimstarOrg i mean sir,, if i make this one experiment,, will my electric bill go down,,, and i pay less

[@jessieangeles7468]

@@RimstarOrg in other way if input is 220acv output 24dcv i will step up high voltage,,when i use 2 or more appliances...is the result is same us ACV input consume by many appliaces?

[@RimstarOrg]

I'm sorry but I don't understand your question. Can you give an example of what you mean?

[@RimstarOrg]

Ah, your comment about electric bills going down was held for review by KZbin. I just saw it now and approved it. The answer is no, it will not make you electric bill go down. It will make your electric bill go up since the power supply it not 100% efficient, there will be losses. The thing I think you are missing in your understanding is that power is not voltage. Power is a combination of voltage and current. If you increase the voltage then the current goes down. Since you increased one but decreased the other, the power stays the same. In mathematical terms we say that power = voltage x current.

[@johnkerley4152]

I noticed that your 30,000v supply seems not to require as much power as the your cube power supply. I wonder if that is due to the 30,000v flyback having possibly more secondary turns,....as I think this would increase the inductance and lower the current.

[@RimstarOrg]

John Kerley I don't know about my 30,000V supply not requiring as much power but I strongly suspect that my cube power supply (flyback with built-in diode and no tripler) supplies more current. Possibly the tripler is somehow restricting the current (a guess) even when the 30,000V supply is dialed down to output the same voltage as the cube.

[@power-max]

RimstarOrg Voltage multipliers are not that efficient under load, there is a lot of science behind them worth searching into, but in some cases, as more output stages are added to boost the voltage, you will see diminishing returns, and eventually each additional stage LOWERs the output! Also, the reason you see steady DC is because the long wire acts like a really small capacitor. that + the internal diodes and voltage multiplier integrated into the DC flyback make make a rectifier. Then it is just a scaled up version of a standard AC to DC half wave (or possibly full wave, depending on the flyback design) rectifier!

[@RimstarOrg]

Power Max Yeah, I have an 11 stage multiplier in one power supply that goes only from around 10kV to around 75kV. Not a lot of multiplication going on there. Probably the diminishing returns. I didn't think flybacks had integrated voltage multipliers, which is why I was surprised to see such flat DC. With just a few high voltage diodes, I expected more half wave rectification. But I guess if there is capacitance in the long wire as you say then that might smooth it out.

[@vishalgaikwad1439]

sir does the BSC25-T1010A flyback transformer works with this circuit?? Please help me I really need your guidance and support.....

[@RimstarOrg]

I can't say for sure, but it looks like it would work. Most TV flyback transformers do, and that one looks like it has a built-in diode, so I'd say go for it.

[@vishalgaikwad1439]

RimstarOrg thank you so much sir but I would like to ask some queries if I have doubt I hope you help me :) ;)