Cute LCD Buck/Boost with Digital On/Off

$2 for 5PCBs - order with coupon code: JLCPCBcom
Any questions about JLCPCB or ordering, pls email [e-mail]
Fnirsi DC/DC buck/boost converter with LCD. Potentiometers for the CC and CV controls and a simple digital interface for on/off and timer shut off. This version is fan cooled - cost $16.99 and can handle 60W. The fanless model is $13.99 and can dissipate 35W. Shame it doesn't have OVP cutoff which would be easy to implement in the firmware.
DC-DC Buck-Boost Converter Adjustable CC CV Step Up Down Power Supply Module ebay.us/QKB55r
Interested in my new garden workshop? Follow the entire build on Julian's Shednanigans:
/ @juliansshednanigans

[@roidroid]

Glad to finally see power supplies that allow adjusting volts/amps *with individual knobs,* instead of via buttons & menus. The button ones seem kinda slow & unintuitive to use. Gimme a bag full of knobs any day.

[@rsmaster5637]

This channel lets me buy stuff i dont need ... thanks for that

[@TheWareek]

Its not stuff you dont need. Its stuff you havent found a use for yet.

[@deankq4adj125]

Love the review, just ordered the 60w because of ‘‘tis video. Keep up the good work! Love the shed videos BTW.

[@johndii2194]

I just ordered 2 after watching your video. Yes OVP cutoff would be good. The timer looks useful.

[@danieldougan8550]

Julian you're a genius and with all due respect it's called counterclockwise not anticlockwise

[@tinkerbot4148]

No word on efficiency. Would be good to test, perhaps?

[@pulesjet]

Well Hell, I order two of these to puttz with.

[@WyndStryke]

The phone is really not filtering out the background noise very well at all

[@roidroid]

On the volts/amps graph the figures show the MIN & MAX values of the graphed line right now. Max values are the ones you were watching at the top, but at the bottom is the min values.

[@mahmoodh7767]

Thanks mr Julian 👍👍👌👌

[@mindyabiznarc]

Without OVP I would have to use another device in tandem(inline) with this to ensure safe operation. I have their USB meter which offers all protections including 32v OVP it has the same splash screen during initialization so it is indeed the same brand. 👍

[@grumpy_old_man426]

Had one for ages. I built a 12v laptop charger to use in my van

[@morpher44]

looks great. gonna buy one.

[@fredlllll]

7:00 waveform page, top is max bottom is min over the whole wave

[@alexstone691]

6:50 bottom numbers are current values, top ones are the maximum values

[@JulianIlett]

That makes sense :)

[@KawekSL]

Rather top=max value bottom=min value. It's based on FP5139, SEPIC topology . There are variants with simpler or without lcd (and digital control) for around 7/3 $ on ali.

[@Mark1024MAK]

As @@KawekSL says, the figures at the TOP are the MAXIMUM values within the period of the waveform currently displayed on the waveform screen. The figures at the bottom are the MINIMUM values within the period of the waveform currently displayed on the waveform screen.

[@iot_enthusiast]

Good morning Julian - thanks for the detailed review of the buck-boost converter. if you are happy with the product I would like to buy the item. Do you recommend this product ?

[@MiniLuv-1984]

Nice find Julian.

[@MichaelBeeny]

I think I would add some rubber stand off feet which will add cooling and help prevent movement on the bench.

[@mikefoster4295]

After a few days use (thanks for the heads-up) my fan stopped and there came a familiar electronic smell from within the unit, a small PCB trace on the left hand side directly under the input connector and routing to the On/Off button had vapourised. replacing with a fine wire, restored operation.

[@steverpcb]

The convention for fan direction is that the blow out of the label side :)

[@unperrier5998]

The value on the wqaveform page show the range for the waform. More precisely it displays the max V and A, since the min is always zero.

[@johndii2194]

I got my 2 units in and found when I disconnected the battery being charged without shutting off unit from output it blows up unit.

[@marklimbrick]

Another great entertaining video Julian. That was a bit mean with the pointless set displays - thing is you were soooo excited at the beginning. Now I just ordered one for £5.99 including 20% VAT, and to save using multi-multimeters that display is cute and useful. Is it just that you are so many years ahead and your letter box should deliver a portal to another universe? £5.99 gets me a single pot from RS now with their min charge. Parts list for this item would be the real cost, a lot more than a fancy take-away coffee.

[@IanSlothieRolfe]

How accurate is the voltage/current readings? It shows 2dp which seems optomistic...

[@NickNorton]

I'm wondering how many Coins you were able to Mine on the LED Super Computer™ during the recording of this Video. Red Light at 'bout 420 THz, you must have computed something.. ;-)

[@mumbaiverve2307]

Very nice unit.SEPIC converters usually have 2 inductors and can have buck boost topology with output voltage in same polarity as the input voltage; wonder if it is that. Wonder if you would do a reverse engineering of the circuit, would be really great !

[@lexpee]

Nice product pity only 60W, i want comparable product but 100/120 watt for my notebook.

[@robertgoddard5695]

Hilarious . You get in the same state as I do with fan directions .screws dropping everywhere. Identifying components . Hahaha it cracks me up all this stuff from china.

[@bill6590]

Julian, thanks for the tip on this device. I built one too. It works fine. Where did you find the complete instructions for this device? I looked everywhere and found nothing. Mine came with zero instructions. I didn't know how to go thru the commands until I looked at your video again. Thanks, Bill

[@jgbelmont]

Really wish this was 10 or 20Amp then I could use it more effectively with my solar setup.

[@TheRainHarvester]

It would be neat if the lcd told you the resistors/necessary to hardwire into some cheap buck boost converter so you could build a permanent /cheaper power supply.

[@KidCe.]

Pretty easy to do it yourself. Find out / measure what voltage is on the feedback pin an calculate the feedback network resistor values. You can find online calculators for feedback network resistors

[@TheRainHarvester]

@@KidCe. Oh yes, it's easy. But it's also cool to put that formula into the Arduino. I'm working on a 60v 3A pulse supply for cutting metal (edm). Stay tuned!

[@citizensteve6713]

Have you installed acoustic panels in your shed ? If not please look into them

[@minecrafter9099]

How do you compare this one with other buck/boost converters you already reviewed

[@pulesjet]

Wondering how long the Wave Form records. Is that the input or output ? Ether it may be usable to see drop out event ?

[@thegreatfixer]

can you test the efficiency of the buck

[@Zadster]

That noise is REALLY annoying. It sounds like a fan with a faulty bearing? Even more annoying than the flashing lights. To people like me who have hearing issues (tinnitius in my case) it is really distracting.

[@pulesjet]

Thinking one would work as a controller for a mini wind turbine. Managing the varying input voltages ? Also good as a go to charger when testing single LiFePo4 cells. 28.8V * 2A is just withing the 60W limit. Damn 50W limit. What ever . They will be used.

[@richardnanis]

Nice little device, maybe a bit overengeered for the power applicable. 60W is really nothing useful, should be at least 300W or more i'd say. But is nice for low demanding devices, lots of features for the price. You should also calculate the effeciency. Unfortunatle Buck-Boost converters are known to be much less efficient than pure buck- or boost-converters. On the other hand they are more convenient...

[@akobenadinkrahene2153]

I pick up one of these, Dam thing didn't work at all out of the box! There is no returns. Did this happen to anyone else?

[@quincycz]

What about precision? I got other unit and CC is not very precise, around +-100mA, is this one better?

[@biogreenz6613]

I wish they would make more digital versions with higher input and output of up to 60v at least and 120v. I've seen a few but would be great if newest style ones come out that are very affordable. 32v limit of most keeps there apliations limited

[@drkastenbrot]

120v is hard to reach with cheap standard components, but 60v is already done by ruideng

[@biogreenz6613]

@joob I've seen the ruidangs and think it's and i think there great

[@SuperBoobaloo]

Any chance of some accuracy measurements?

[@STONEDay]

A lapel microphone might be in order to help with the signal to noise ratio.

[@JulianIlett]

I can't find the microphone socket on my phone :)

[@STONEDay]

@@JulianIlett Oh. The headphone jack usually doubles as input for microphones. If in the phone has a headphone jack.

[@CHIEFMONOBOBO]

So if i wanted to use this for a solar panel system. say i've got 800w input max will this limit the wattage to 30 or 60? I guess that's the only thing i dont get with these. Hope someone can help me.

[@MacVision3D]

Just a quick question i have a 100w 12v panel can i plug it directly into this module

[@eded8045]

is usable for finding a short with voltage injection into a circuit from 5v and under?

[@winstongarcia6551]

Hi Julian, could you please tell me the size of the fan? Thanks in advance

[@EasyOne]

NICE

[@dushandesilva2595]

Hi can you tell me if I can use a step up converter to get 5 amps with 12v in to 12v out ?

[@RoeeBloch]

From where did you buy the supercapacitor board ?

[@rimmersbryggeri]

The NCE6075k looks a little poorly soldered to me.

[@Xiaoxiaoxiaomao]

How much watts?

[@Xiaoxiaoxiaomao]

How much watts?

[@DelTapparo]

Flashing LED background is very annoying !

[@David_11111]

yay ... any suggestions on a 12 volt to 19 volt to charge my laptop from my van 12 volts please

[@RaveTracks]

Just type 12v to 19v in to ebay search. I use the one around £15 that is metal and potted resin. They work really well.

[@welshdave5263]

I've tried charging my DELL E4310 using my buck-boost which is kind similar to this. It would power my laptop but it wouldn't charge it. I paid £30 on Amazon for an actual in car laptop charger that takes 12v in from the cigarette lighter socket, that does charge my laptop so, it's kind hit n miss with a buck-boost, depends on if your laptop actually has "1wire communication"

[@RaveTracks]

@@welshdave5263 Yes that's a good point. I've got an older Toshiba that just uses a standard barrel jack so isn't too fussy about the power source.

[@welshdave5263]

@@RaveTracks Thanks, did think my Dell was a standard jack, when I looked closer, it has an inner and outer contact to the barrel, plus a pin inside, oh and the sheath is breaking so I can see three conductors.

[@robbieaussievic]

@@welshdave5263 ..... Pin is ID sense, inner + outer - Be careful of Lenovo rectangular plug, don't make assumptions, they are tricky little buggers. (inner side contacts).

[@radhesyamaji]

❤❤❤❤

[@stevenbliss989]

Might be a SEPIC using a shared core.

[@rollinhand4750]

60w I saw the ads and they claim a heathsink for the 60w model and I didnt see none on yours.Maybe is the extra fan?

[@Mark1024MAK]

The “60W” version comes with a fan that you fit yourself. There is no extra metal heatsink.

[@Valenorious]

Screwing the thing apart with input lead connected. Really?

[@JulianIlett]

Yes :)

[@homelessrobot]

both the input and the output are low voltage. no bravery required

[@echo-_-radio]

well that didnt last long mines shorted out whith my mad ideas input instead of out grrrrr.. any ideas on what i look for to fix it please?? thanks julian :)

[@echo-_-radio]

recistor i got it i love this learning electronic.

[@Totogita]

The link is no longer valid to purchase it

[@KawekSL]

anyone know where you can buy those potentiometers ? Or knobs are glued ?

[@dee-dah-bleeda]

Mine came with a SMASHED screen. Seller refunded me very good. I got to keep the module. However, Ive been unable to locate a replacement screen. IF YOU KNOW OF A SOURCE OF THIS SCREEN please message me. Many thanks

[@MustangFrenzy]

Nice vid thanks. Ordered before i wached. It seems like your missing the heatsink. It should be included.

[@Mark1024MAK]

No heatsink is supplied. The extra is the fan that comes with the “60W” version.

[@MustangFrenzy]

@@Mark1024MAK search ebay and look at the pictures. Mine will come in 2 days. Also the high power version. Hopefully with heatsink as advertised.

[@Mark1024MAK]

@@MustangFrenzy - earlier in the year I ordered and received two of these. One each from different suppliers. Both being the “60W” versions. . Hence they both came with fans like in the video. Neither had heatsinks fitted or supplied.

[@MustangFrenzy]

@@Mark1024MAK also no heatsink here, just a fan. But its a cool little device.

[@tonystewart3335]

Mark 1024MA

[@doctorbuga4302]

jlc > pcbway.. had 5 x 110x140mm boards made 5@jlc and 5@pcb.. both batches arrived at the same time..quality the same... total cost ($CDN): pcbway $90.71, jlc: $21.73

[@doctorbuga4302]

pcbway had $30 surcharge because board exceeded 100x100mm... jlc had no surcharge... pcbway shiiping >25$ which triggers import and brokerage charges.. jlc shipping < 20$... so u can see how a 5$ job can quickly turn into just under 100$ .. i will stick with JLC

[@DavidMsg]

Getting 'threat of data loss' warnings on the ebay page. They seem to be serving content from a 3rd party site. Be careful!

[@jyvben1520]

stick some red tape on the red output, under the top layer

[@Mark1024MAK]

Won’t help, this is a LCD display with a white LED backlight.

[@raulmoran5244]

can you use this as a mppt solar controller?

[@Frankhe78]

@Julian Ilett clever audio ont you phone indeed. What phone do you use?

[@JulianIlett]

It's the Doogee Mix Banggood gave me

[@JulianIlett]

Oh no, that's a total lie - it's the old Google Nexus 4

[@AitoLaikoSamoMoaCawfy]

seems like your confused on what ur doin pretty sure most of what this thing do is pretty much straight forward

[@dennisthrush2835]

What is the name of the Manufacturer and model number, if I wanted to order one?

[@JulianIlett]

There's an eBay link in the description

[@Sifizero]

oh wow i can hear that, is that similar to the sound that young people hear at higher frequency s

[@a1fliema1fie]

Yes, the noise of the background bitmining is dreadful

[@kennedy67951]

After your review of this Product. Would you recommend this device???? Is there a better Product that would be around the same price or maybe cheaper???? Thanks for the upload. P.S Maybe you should look at the Operators Manual first before doing your reviews and locate all the parts sent with the Product so you don't like a Dufus. Just saying Mate.

[@JulianPicht]

What's that terrible sound in the background? The video is nearly unwatchable.

[@tinkerbot4148]

Ant miner 'heater'

[@NiHaoMike64]

@@tinkerbot4148 Good opportunity for a DIY acoustic panel video.

[@JulianIlett]

I'll be using Rockwool :)

[@Xiaoxiaoxiaomao]

👍🏻

[@overclockers6835]

Looks like if you get a unit with a fan (enhanced edition), they do not bother with heat sinks (regular version). Also, noticing large spikes in voltage when you turn on power out... kzbin.info/www/bejne/noa4m6SvhcmnhJo

[@roberts_curiosity9387]

I'm also getting the voltage spikes when it goes into current limit. Video at: kzbin.info/www/bejne/gJqomnqAidR_gLc

[@Mark1024MAK]

I’ve commented my thoughts on the subjects of the switch on spike and the spikes on the waveform when in current limit mode, one set of comments over on Overclockers channel and another set of comments over on Roberts channel... On heatsinks, I not sure that either version that is being sold has anything that I would describe as a heatsink despite what the listing photos show. Has anyone bought the non-fan version? Did it include a heatsink? Also note that the fan (on the version with the fan) appears to run constantly (even when the output is off). It is powered from the 78M05 voltage regulator. The fan uses about 140 to 150mA, so if the input voltage is much above 10V, the 78M05 voltage regulator will get warm / hot.

[@richardlinked8797]

Great video, I wanted to ask a question, I'm looking for a DC-DC converter that can take my 24-42v battery packs and regulate the output at 30v at 20amps, do you know of a diveces that can do this. right now I hook my batteries up to the load (grid) and they just dump, I don't want to buy a grid tid inverter. Thanks

[@lesliepieterse1072]

I thought... but obviously not :)

[@jacekf]

how about you play with the item and learn how to use it and THEN make the video!?!?!

[@roberts_curiosity9387]

Hi Julian: I'm getting a quirky output waveform on this converter, when it goes into current limit mode. kzbin.info/www/bejne/gJqomnqAidR_gLc

[@Mark1024MAK]

I’ve commented my thoughts over on Roberts channel...

[@mgwrighttube]

Please stop the noise! Is it the damn stupid "supercomputer"? I had to stop watching

[@felixcat4346]

The background "music" is great, don't turn it off.

[@VICTORDART]

Unsubscribed until you bin the stupid noise and the flashing lights. Bye.

[@JulianIlett]

Bye.

[@mikelee1906]

When I went to watch your videos instead I found: This channel has no videos. Julian is the best! The sound is fine. You can hear every word he says perfectly. What do you when you are in an automobile? Cry the whole time because of the traffic noise? Somebody is a little bit full of himself!!

[@guygordon2780]

@@JulianIlett It never helps to make your videos unnecessarily annoying. What does it gain you?

[@Tocsin-Bang]

Audio is thew worst I've ever heard on your channel.

[@rossmckenzie9446]

"a bit irritating"... not half as much as that bloody background noise and flashing leds across the screen. I'm OUT!