DIY Dual Power Supply
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- Опубліковано 17 вер 2017
- My own take on GreatScott's Variable Lab Power Supply
His version is here and goes into more detail on wiring these parts together
• Build your own Variabl...
I decided to do a dual version because all the parts were so cheap and I wanted the enhanced test capabilities of a dual power supply as demonstrated towards the end of the video.
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Music: sinh - Early Spring ft Masego - Навчання та стиль
Nice job! A couple of things I would have done slightly differently:-
Space the output terminals at the standard 19mm (3/4"), allowing various special plugs to be used, and which also gives more hand clearance to the knobs.
Use plugs and sockets for the pot connections to the PCBs.
4:58 exactly what I was thinking you should do. Great thought pattern, came up with the solution you needed with minimal effort
2 knob design tweaks to consider for next time or for others watching: use red and blue knobs to match the LED meter, and put the knobs stacked vertical, so red on top, blue on bottom, again like the meter.
Thank you!
nice work and if you use multi turn pot will give you more voltage and current control ;)
Nice job but maybe a fuse or two and the 2.54mm JST 3 pin socket fits perfectly in place of those blue trim pots.
Nice. Would you have a link to theses buck converters ? I am looking for some that can output 5A
Could you use this supply to get +12V and -12V rails for opamp projects by connecting the positive terminal of output 1 to the negative terminal of output 2?
Thanks
Hi, nice job! Can you connect the power supplies in series, that you have +/- 30v and by the connect GND? Is it possible?
They are positive only power supplies. If you want to connect use both power supplies at the same time you will need to connect the negatives together so there is a common negative. There is a potential difference between the two that will need to be negated. I haven't actually tried linking the two in series but it could be done just not negative supply
Hit there.. 1st off awesome build. 2nd I was wondering if this variable power supply would be suitable for using to power a foam hot wire cutter?
Cheers man. It would depend on the current draw of the foam cutter. Best to check the wattage ratings of the foam cutter and compare them to the output ratings on the power supplies. Hope that helps
awesome project. I tried to take little pot out and boom ltc3780 fault light was on. turning V protection pot is not doing anything... tried to replace it with 5k pot nothing. soldered original pot back nothing..
Set the pot to 0 or min. This is undervoltage protection so yiu dont need it
Hey HandyTech,
Are you able to use this as an adjustable differential supply? IOW, could you connect the negative of channel one to the positive output of channel two and use the remaining positive and negative outputs to provide +/-30VDC? I'm interested in building your setup for this purpose, but would like to know if it works beforehand if you have time to perform that kinda of test under some simple loads. Thanks for the video!
I've since pulled the unit apart to use on other projects. Only odd connections I did was hooking up the power supplies in series which worked a treat
I really like this particular project that you did but I am curious where did you get the project case that you built it in?
dwalker691 Google this : quality-instrument-case-253-x-190-x-82mm/p/HB5910
Thank you very much. I am planning to use your design to build my own project power supply.
it would be nice to make one that can go from 20V to 120V +0- for testing various amplifier boards. I would like to know how to limit the current across both supplies with only one command/knob but doing it separately is okay i guess.
Hey, i have a background in mechanical engineering so I'm not the best electrician but I am in the process of making it and I was wondering if the power supplies are wired in series or parallel for there to only be 1 socket, also would this work 3x and 4x
Yep the 240v power supplies are wired in parallel and yes it would work with more. A safe idea would be to fuse the 240v input with a suitable fuse
Yep the 240v power supplies are wired in parallel and yes it would work with more. A safe idea would be to fuse the 240v input with a suitable fuse
Can you get a parts list its looks nice
Thanks mate. In the video description I linked a video that I based this design off. That video goes into more detail on parts selection etc. Thanks for watching
Is there a reason why you used two feed power supplies and not just one with a larger amp output?
Hi Jason. I actually only decided last minute to do a dual version. The price of these items were so cheap I decided to buy two of each. Don't forget you have to tie the negatives together if you want to put the supplies in series :)
Fair enough.
:)
I am collecting parts to build something similar.
But I am planning to use an ATX supply as the main supply.
Having fully independent and isolated supplies, each with separate + and - terminals. is much more flexible than having a common - terminal. You can use one for + and one for -, or you can add then in series to increase the voltage.
Nice design and nice packaging.
It appears that you used two a/c inputs for the power supplies. Is there any reason not to use a single a/c input wired to both supplies?
Mark WP Hi Mark I only used a single input for the two power supplies just might not have been shown in the vid sorry. Thanks for watching mate
6:16 blue brown is the input, reds blacks are the outputs.
Please name of case
We are nerds Shop quality-instrument-case-253-x-190-x-82mm/p/HB5910
Thanks
It's 10k the pot
You can use inplix, it has the best handbooks and ready instructions. You can learn much from them and make it yourself.