Voltlog #64 - DIY Adjustable Bench Power Supply With Enclosure 

Thanks mate for the awesome video, I ordered the same power supply kit as well and this and also the previous video where you assemble the power supply kit was very helpful, I'll post the video up soon, still waiting for the transformer to arrive, and I'll make a separate one for the enclosure as well. Keep up the good work and all the best :) Cheers

Another great video. I never thought of mounting to the top cover. Great idea!

great built as usual. always informative and always a nice clean job fantastic. ..brilliant channel keep it up my friend. ...UK subscriber 😊

Nice job. Thanks for taking the time to show how you did that. For what it's worth, I cut out panels the same way. The only difference is I drill out the corners first, & then file out the fine details. I have lots of different tools at hand, but that seems to work pretty good for me.

Thank you so much for the links . Great video thanks

Nice build and great detail!

Nice build!

Nice built. Reminds ne that i also wanted to build my own (actual i have the parts for 3 different models laying around here but no Time to build them). I like the mounting upside down. Never thought about this bit it could solve some spacing problems.

Good project, nice video.

Nice build.

Good job. Nice to see proper use of ferrules, sil wire, heat shrink, etc. Does the transformer quite down if you ground the center caps? One thing that would be good is a sil pad for that MOSFET. Never a good idea to leave a charged transistor sink. If is a giant noise injection system, especially with a motor right behind it. It cost nothing and would make a much safer and professional build. If you did this you could ground the transformer caps and the heat sink and be in good shape from a safety point of view.

Good project

Very cool indeed, I had planned on building my kit using the same PS board but using an arduino Uno or perhaps a Nano with an lcd display, however after seeing how good that display works I may well buy one of those. I will have to sell off some of my toys to raise the funds for it, perhaps now is the time to get rid of all my Archos collection.

Thanks for all the great videos you post for us. It's always very interesting and inspiring to watch your content. Keep up the great work! btw: do you have a subscriber goal for this year?

You should check it for an hour while drawing 3A with low output voltage of a few volts (use low value load resistors). Then measure the temperature of both the heatsink and the transformer. I'm afraid you will see that the transformer gets to a very high temperature because the current into a rectifier with capacitor load is taken by very high current value and narrow pulses that cause much higher heating than what is expected from the average power of 90W. I have checked a number of 3A transformers with disappointing results. Second test is to check the voltage ripple at the output when delivering 30V with 3A .In this case the transformer output voltage sags to lower than 24Vac because of the high current, additionally the main capacitor will have large 100 Hz ripple so at the lower voltage point on the capacitor you won't have enough voltage margin for the regulator. By the way, I can't find in Banggood the beautiful heatsink that you used. I will have to find another big one. Victor Koren

Great video. Any future plans for a bluetooth speaker? I remember you mentioning it quite a while back. I'd be really interested to see what you do with some of those csr chips.

Will you make video on connecting the panel meter to the buck converter?

So the current is calibrated by short circuiting the PSU with multimeter, no external load?

Calibration is done close to the upper limit of the range. For 20V that would be between 15V and 20V and for 2A again slightly bellow. If you are concerned about the nonlinearity of the meter then mid range would also work.

Hi! great video, informative and professional as always. I might have missed it but you clearly stated in the video that the plastic enclosure was bought from bangood; now i can't find anything like that typing "plastic enclosure" on bangood's search bar and there's no link for that particular item in the description. It would be perfect if you could add the link. Thank you

Great video. This Toroidal Transformer only puts out 3 amp, is that really enough for a benchtop?

Could not see how your pot's are wired from video. Could you tell me which colors go on what terminal on the pot?

Hi, In one of your 'InTheMail' videos you mentioned that you would be using a 1A Fast Blow fuse for this power supply. I thought it was normal to use a Slow Blow fuse on the power input. Is that not your understanding? Nice work by the way and good video as always.

Thank you for the high quality videos. I am mounting this power supply, and I have a 12v and 7a transformer. Is it possible to use this transformer with this power supply? Thank you very much for your attention.

Hi . I have build the same circit but the problem is that is stack at 26 vdc. I tyred to change the voltage but nothing changes. What i have to do ?

Will you do some measurements on the noise etc of this psu?

Nice video. Do you have a link for the plastic enclosure?

Funny, I'm also planning to do a Lab PSU with the exakt same PSU Kit, but a more advanced one with two channels (two kits), 2 LCD's + Arduino for data logging and measurements (:

Are you sure that rocker switch is rated for mains voltage? I seem to recall that they are meant for 12/24V DC type applications.

Have you tested this power supply (after assembly) more deeply, like gophert product ?

Hi and thank you for the detailled presentation. Very good job. I have a question about the P.S. Is there a way to know in advance the limits of the Amps we want to give to a device? I mean, for instance we want to supply a device with max only 1A, eventhough the device at the moment consumes 0.8A. In case that for some reason the current increases, we don't want to give more than 1A. Is there a way to know in advance with the Indicator of the potensiometer where is the limit of 1A?

hi there im building the same kit here but im a little confused with where to wire in the dc to dc convertor cheers peter uk

You should try using a nibbler because you will get better results with it

is there any transformers that will work similar to the one you used there? the lowest price I could find is $55 and I'm not paying that much.

A nice build though I think you have under specified the transformer. You may well lose regulation at higher currents at 30v. The other issue with this kit is one of the op amps is run beyond its maximum voltage rating and the output transistor is at its maximum rating. So this PSU is ok for low current low voltage projects but will probably break under any sort of load. I have a Lamda PSU that supplies 12v at 8amp and that has six 2N3055 pass transistors though that is very much a professional unit still going strong almost 50 years after being built.

I use a larger and noisier fan. An idea for a temp control fan with the LM 2596 board ? , I replaced the 330 ohm resistor next to the 10K pot with a 5 Kohm NTC and glued this sensor to the collector pin of the power transistor (hottest point ) Now the fan only runs full speed when this transistor gets really hot.

why is it hard to get a power supply with more current? i mean 30V is nice, but i dont like the current limit for lower voltages. i wish there was a cheap module which could take any kind of mosfet for switching and you could adjust the max current

So how has the case held up against the heat? Any warping?

Nice wideo as allways. Why not use the onboard fan power supply, changing the 24v regulator to 12v

can not get plastic Enclosure & can not get VAM 9020 front panel Meter from Banggood dos not have

i think the box link is missing... btw, great video! I'll adding stuff to my shopping cart :D

🤔 a link for purchasing the toroid please?

You first changed range to amps and then just reconnect probes cables ^^ You aren't afraid of doing that?

Nice video. Im not sure this project gives any advantage to buying a cheap gophert power supply reviewed on this site, except of course if not for the fun of it.

Change that transistor to a better one. Like a 200watt one atleast. Or 300watt.

but avesome video

the output is -0.65 what u can do

Hai, great video..Where can i find the .PDF File

And the display can't show t° ? Bummer... That should be suitable.

Analog??? I thought is Digital Meter?

the only thing I didn't have is the transformer

Nice build!