Power supply with adjustable voltage and current

Circuit and PCB www.vip-cxema.org/images/zip/y...
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Laboratory power supply ali.pub/2tmanr
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[@mikehauk6079]

I just finished building. I changed the diodes and a couple other things. As I built using 2x 24V 2A transformers (the amps are very much needed in the bull plop in which I dabble) in parallel also with a voltage doubler throw switch incorporated into it (I tend to get into some crazy schtick when working alone... seems as if I need to humor myself just to stay awake...). Honestly ... It is very very very precise for the most part! I killed current pot tho. LMAO. Other than that. VERY impressed. I just got my new lab psu about a week ago... NOT that I needed a new one. I was just keeping up with the Jones's. I was looking to build a new one from scratch. I have been reviewing a few different schematics over the last couple weeks. This one seems extremely simplistic and I very much had my apprehensions. However... I was very much proved wrong and sometimes it does seem that less is MORE.... just like the linux command... lol Thanks for the great idea!

[@maxxsmaxx1901]

Great job ! Simple yet functional power supply

[@chayton4003]

this is the only diy youtube channel i will ever watch ever again

[@John_Smile]

Very simple and efficient! Thank you very much !

[@jhontejada5773]

Nice, I understand and a clear explanation of components,thank you..

[@Abduljalil-sb6vd]

fantastic bro I love your video and great bcz you give a print and also circuit diagram

[@JohnPaulMRuiz]

Thanks! a big help for me. :)

[@pradeepekanayake930]

Its awesome. Welldone bro (y)

[@studiocreator2168]

Good stability for voltage drop when the bulbs are powered ! 5 seconds for shortcircuit are resonable but Try to implement a circuit solution with a permanent protection .

[@ArekJP]

CCCP transformer :D My Man!

[@letsnotplaywithelectricity9346]

Fuck off commie!

[@capiberra4118]

Interesting stuff Thanks.

[@demoinja3695]

since it's a liner power supply i assume i can't adjust it for higher amperage or the T2 will over heat or i can get away if i replace it with a power transistor ? and if i can what should i adjust to get more amps ?

[@ayushbansal3140]

Hello Kasyan, I liked your videos, but it would be good if you explain the working of all the components in a circuit or say complex components (which are not easy to understand at first sight) so that more and more people would be comfortable using them.

[@danielfreeman9098]

Hi. If i replace the diode can i get more voltage from it? I really need a good power supply and it would be nice circuit and not a very expensive stuff

[@photonic_induction2633]

cluod you make a smps version with current and voltage controll ?

[@RB-pw5ff]

Dude u ar Awesome!!

[@matatisan]

I am really like your channel! keep uploading videos! Matan, from Israel

[@chayton4003]

thx kaysan tv cuz i am a beginner

[@zubairbabu2432]

Amazing

[@tunahankaratay1523]

How can I modify this circuit for 30v 5a? I have tip2955 pnp and darlington/normal npn transistors.

[@m4dd1m4]

Hi, Aka ... I didnt know you have english channel as well ... your English sound surprisingly good ... except for things like pronouncing linear (произносится "линеар", а не "лайнеар") ... удачи братан ))

[@iliasanisis7799]

what hapens to your circuit entrance + dc is common with the out - is it so?

[@jayakumar5055]

i think rectifier positive pole and capacitor positive pole would be changed to emiter of tip 42 is it correct or not please confirm one more think that is positive and negative are short

[@GP-ze6gf]

nice video

[@trustmeserious]

Hi bro... Can we use 2N4007 diode and bridge rectifeir insdead the others which you used ?

[@kenfranco7981]

The polarity of C1 is backwards in the schematic diagram shown and so is the full wave bridge rectifier. The PLUS should go to the emitter of VT2 and the negative of the power supply should go to ground.

[@cipry1010]

i think this design wont ever work,even as you corrected

[@mihailsaltirov5333]

nice vid

[@dingdongpattiwack]

Ive had trouble with the transformer and bridge rectifiier part of this type of circuit in the past. what about omitting those two components and get the desired fixed voltage from an ac Adapter ? like one from a radio the little black box things you plug into the wall with a jack on the other end....? Im sure you know what I mean lol. will this work the same as an input voltage you wold get from the trans/rectifier components? or would the amps not be adjustable as its fixed coming out of the ac adapter?

[@redsblackipod]

If you use that, you can ommit the transformer and the full bridge rectifier (along with the capacitor, if you'd like). The only problem would be the output voltage and output current of your adapter. And should you do a short circuit, you might blow the fuse inside the adapter.

[@esam461]

Very cool

[@isamsungnetwork6754]

may I apply this to control the amperes with battery Lzz guide us!!!! because I need 8amps to charge the battery but solar plate sent to battery 12amps we need 8amps

[@damnedattendant2536]

Seems your rectifier is inverted . the dc output is directly going to ground. WRONG

[@spacewardDev]

C1 is also inverted.

[@chiefrunningfist]

Should R4 be in between VT1 emitter and VD2? Should 20V RMS make C1 closer to 28-29V?

[@franzliszt8576]

@@chiefrunningfist 50 v would be much better and safer

[@JasonRobards2]

@@franzliszt8576 Why so? I'm trying to learn how this circuitry works. Kaysan's video's seem very simple to understand, but I want to understand each part of it before I dare trying it out for myself.

[@franzliszt8576]

@@JasonRobards2 damn i made this comment 2 months ago i have completely forgot about it i will tell you soon your answer.

[@atheera349]

Can i use 2N3055 instead of BD139 to get up to 10 or 5 amp? * my transformer can supply up to 10 amps

[@mohammadrezahajipour5356]

Excellent

[@er.jugalmandal7736]

if i use a 5/10 amp transformer the ckt will control the current or not ????

[@suspiciousperson5324]

At last! Someone who knows how to display schematics on videos

[@GP-ze6gf]

can i use this one battery drill 12v and 1.5amps

[@rithikkrishna3344]

I made this circuit,i used for two days.on third day while i was charging the lithium battery Tip 42 c burns and there is no resistance among those three pins.May i know why this happens?

[@rithikkrishna3344]

Can i use SMPS instred of transformer.if i used SMPS ,is it necessary to use the sender diode.

[@blackburnmichelson6189]

How can i icrease current limit? Can i build this device with lm317 ?

[@florianalia8319]

I have a question!! Does the supply outputs a straight DC or a pwm signal? Can i charge batteries with it

[@kennmossman8701]

DC, you need a battery charger

[@muhammadjaka7068]

nice one , can this supply adjust frequency too? i need to change frequency to my EIT

[@franzliszt8576]

No

[@power45118]

What is the function of that 1k 2w resistor?

[@ehlitton7811]

Excellent video Kasyan! I wish I you could slow down your speech though, it's hard to understand you, no offense though!

[@thewhitemustang]

Go to settings in the corner of the video and click on Speed 75%. To me he sounds better than a lot of English speaking folks.

[@rangasamythiyagarajan8568]

Dude, I want to have 40 v and 0.20 milli amps to 15 Amps variable AC to DC supply.Can u guide ?

[@homemakeidea.8333]

Nice

[@deividpaixao8760]

Hi, my friend, my transformer and 25 volts to use in this scheme? Or do I have to change some componet?

[@robindegans9014]

If your transformer outputs 25 volts the voltage regulator needs to dissipate a lot of heat, the efficiency will drop as well. In other words, you need a bigger cooling block.

[@peshoyalprns1849]

I have a transformers 24v and 10a can I use it

[@duncpol]

What is the purpose of VD2 diode and R5 resistor? It would be nice if you added short circuit protection.

[@djordjepavlovic5870]

coould this be modified to achieve 10 amps car battery charger?

[@alpogant1071]

can i use 24v 1.2A power supply

[@kartikhegde9368]

Is this circuit suitable for 2A??

[@RahulShinde124]

can i use this circuit in motorcycle for charging battry and 55-60watt headlight bulb? i have Yamaha rx135, we self made it coil and its output is 60v 6a when i accelerate bike on full throttle. we need 12v 5a for headlight and 12v to 14v 1a for charging the battry. do i need to make some changes in circuit? then what is it? please reply...... Thank You. :)

[@leopoldense2239]

Does it serve to control 1000mw laser?

[@brirajbanssingh5120]

Nice vedio thanx for the same. Sir I want to design a power supply of 12 volt 20 amp current adjusted. Kindly guide me how can I achieve. I shall be highly grateful. Regards

[@JasonRobards2]

How does the combination of VT1 and VT2 work exactly? Your video's seem very simple to understand, but I want to understand each part of it before I dare trying it out myself.

[@tanishqbhaiji103]

The first feeds the base of the second, it is to amplify the current gain

[@jazzlucian87]

can I use Mosfets instead of PNP andNPN for higher voltage?

[@tanishqbhaiji103]

No

[@MrHristoB]

Сделано в СССР!!!! Ураааа!!!

[@MrManojg1]

nice

[@EJEuth]

Several circuits Kasyan has presented are very interesting, educative and even a joy to see. But this circuit/project has some problems and difficulties, as it presents 2 mistakes in the diagram: (1) inverted polarity in rectifier bridge; (2) inverted polarity filtering 2200uFd capacitor. Also, circuit configuration does not provide consistent current limitation from one build to another, as it appears to be made using the transistor gain (beta) properties, which varies a lot from sample to sample. A simpler signal Transistor and shunt resistor (about 0.5 Ohm) could provide current limitation & protection, without affecting voltage stability. Several other projects made by Kasyan already perform much better than this one; use those instead.

[@t1d100]

"Several other projects made by Kasyan already perform much better than this one; use those instead." Please list those for us.

[@hemanthkumarHere]

This is great. How much is the efficiency?

[@robindegans9014]

probably not that high because he used a linear voltage regulator.

[@trustmeserious]

Can I use here 12 0 12 transformer ?

[@thghho]

Hi, Can we use your method to charge Ni-MH Type Battery? having INPUT: 220VAC and OUTPUT: 190-220VDC (adjustable) with 1-6amp (adjustable)? Please guide accordingly...

[@kennmossman8701]

NO

[@21thTek]

capacitor polarity is inverted dear, it could explode or set fire, be very carefull with this !!! ✴✴✴

[@energiasolarnovaledosaofra1796]

ola amigo, deu certo, o tip42 tinha que ser invertido. deu certo vou postar e te mando o link obrigado, vai me ajudar muito a economizar

[@leopoldense2239]

adriano costa sabe se serve para controlar laser

[@jenniferrodrigues5387]

adriano costa posta o esquema

[@tonbovee5486]

Hi , May be an idea for a new experiment. I got 10pcs lm317 for $1 from TK Electronics , on Ebay and believe it or not those work as original from ST and do not blow up even at 39 Volts input and short-circuit , current limiting works at 1.5 Amp. I build a linear regulator powersupply using a lm431(instead of a 10kohm pot) to drive the LM317 (in my case 6pcs in parallel). It resulted in an extreme stable powersupply.

[@t1d100]

Did you ever post this project? I would like to see it. But, KZbin will not let you post the link in the comment section (unless it is a KZbin address,) so you will have to find some way to code the link description to be something that we can understand.

[@sajalmahmud7286]

How to bring up adjustable Voltage and Current ......what component I need to change

[@1959Berre]

You should include a fuse.

[@mooddy_bad5260]

niceee

[@amirabdurraman6286]

The circuit is very good, but it would be better with a current limit indicator ... Maybe a led indicator

[@lingjati]

What's that 1N5408 diode for?

[@wafiullah-shafia]

Hi The link's in content is not working?

[@dhruvvyas6347]

can u show how to make a 0-50v 0-3a power supply

[@wingedbull1257]

My concerns are 1: does shut off when is fully charged the battery? 2: can you connected to a Generator and then when the battery is fully charged will then shut down and when the battery is low in power will start again to charge it? I look forward to your reply please if you can provide diagram of what I am asking for.

[@robindegans9014]

This does not have a charge protection because it's a simple power supply. And yes you can use a generator for your electricity, though you have to look for the output of that generator to see if it's still enough to be above your desired voltage because the voltage regulator is a step down converter.

[@jackhamer449]

can you make a metal detected circuit plz?

[@LZ2SM]

I'm back in to the USSR!

[@ramyagopalakrishnan8682]

is this board dot board?

[@SantoshBhagwat1976]

dear friend could you please give me ckt. diagram for 0-12DC VOLTAGE & CURRENT REGULATED POWERSUPPLY USING TRANSFORME OR SMPS ?

[@kethotvanbuyuten4762]

Can i change R1 and R4 with 10k?

[@chikku168]

I made this circuit but not working I added bd139 And tip42 I replaced vd2 with 1n4007 Plz help me

[@letsnotplaywithelectricity9346]

>CCCP That was one old tape deck you got that transformer from lol

[@sandeepmauraya5242]

Lets NOT Play With Electricity

[@juniejohn2545]

Can you help me how to make an AC (230V input) to DC converter with adjustable output voltage (0-30V) and current (0-10A)?

[@kennmossman8701]

why 10A

[@fredfresnoza1982]

can this circuit support my 30 volts ac 6 amps transformer..?

[@a.olivieri5623]

Frederick Fresnoza yes, it will

[@anirbandhole4526]

I have a transformer rated 30v and 100va.. Will this work for me? How much maximum current I can get?

[@KasyanTV]

hi, would, you can get up to 3 Amps.

[@anirbandhole4526]

Kasyan TV great

[@user-gd8gt4hq6m]

👍

[@Nepercos]

Voltaj neden 15 voltla sınırlı. 30 volt ayar yapamazmıyız ? Amperi yükseltebilir miyiz ?

[@robindegans9014]

It is probably limited to 15 volts because that is either the maximum of that linear voltage converter or the transformer gives 15 volts from the power from the wall.

[@Nepercos]

Teşekkür Ederim. İyi Geceler

[@robindegans9014]

No problem, sleep well :D

[@syaifulsarnawi9607]

I want to buid 0 to 30V and 0 to 20A adjusted power supply w/ current limiter protection , what component must be replace/modified? Oh all was clear from your explaination before, cos I watch this video partially, I'm sorry bro

Hi. I am following and learning from youIt.But this circuit is not working. I made it, but the resistance of 470R was given out smoke! After calculations I noticed that if it's power is 0.25 watt, only 23 mA can pass through. Which means 9V maximum output can be taken. So it must be at least 2 Watts. Also the rectifier nodes must be changed as others mentioned.

[@thghho]

Hello, Can you guide me for limiting the output current to 350mA of a power supply (with output 250vdc, max output 15Amp). Should I simply add 0.22 Ohm 10W (9 Resisters) in Parallel before load?

[@ionutzztunoi]

I have a circuit that draws 25 amp at 12 V , how can i Reduce the Amps to 15 but keeping the 12 Volts. Sorry for the idiot question.

[@florianalia8319]

If you have a transformer you need to change the secondary winding to a thinner one and also calculate how many turns you need for it

[@fernandoesposito8399]

Lo schema ce un errore ci sono gli ingressi di tensione dopo il ponte di diodi invertito il positivo e collegato con la massa e viceversa

[@ProfeJulio1]

Hola, buen trabajo... El diagrama esquemático tiene errores y a un aficionado no le servirá.. Hay que invertir el puente rectificador RL 207 y el condensador C1 2200 uf y funcionara perfecto...

[@delectrical4030]

what do i need to change if i want to have an output voltage of 110Vdc and 1amps. what components do i need to change.. thankyou for the response :) Godbless

[@hazimbahar788]

anyone pliss help me, i modified this circuit, use adapter dc 18v 2A, no bridge rectifier, 220uF 35v, 1n5402, pot 10k for voltage, pot 5k for current. component burn, and jumper also burn. when i put load at ouput. component burn

[@dinkyray6876]

We will need to see your circuit diagram..

[@dhruvvyas6347]

how to make a 0to50v 0to3a power supply please make one🙏🙏

[@kartikhegde9368]

What is the value of transformer??

[@moneymagnet_ke]

can a person use a schottky diode instead of zener

[@kennmossman8701]

no

[@tijojose6858]

Can i change tip 42 by lm 317

[@f.a3202]

no, tip 42 is a pnp transistor. lm317 is a regulator

[@HealingSounds-we6oq]

The current regulation of this circuit really work?

[@gajananphadte3440]

I doubt.

[@williamguillen4113]

The pot R4 is not a commercial value.

[@brainyjam]

Ohhhh. Where do I start? Ok. Your polarities are incorrect. Switch the connection to the bridge rectifier as well as the orientation of the capacitor C1 and the circuit will work. Your polarity indication at the output is labelled correctly but according to the take off from the bridge that would be a common positive. Also VT2 needs positive input at the emitter.

[@OMEGa3FattyAcid100]

can we make from LM 317T ?

[@andrewferg8737]

LM317 can replace the zener diode, but you will still need the transistors to provide the current boost.