Cheap power supply for top balancing

Just John

Photon Sorcerer
Joined
Aug 15, 2020
Messages
2,446
I posted this in the tools section where it belongs, but I want to let beginners know about it, so I'll link to it here:


Please note, the Long Wei come with the best alligator clips I've seen on any 10 amp supplies, which only means they are a poor choice. If at all possible, I highly recommend 10 gauge (good quality) copper wire with crimp ring connectors, you'll get more amps and shorten what can be a lengthy process. If you are curious, I can post links for them as well.

I did this testing because a lot of people were recommending not to run a cheap Chinese power supply at the full power rating (and in general I agree with them), but this is one you can be confident will run at full rated output without killing it. I know, I tested it.
 

Roberto2

pensioner
Joined
Jul 10, 2021
Messages
8
Location
South Africa
If "electronically inclined", one can build a cheap 10amp power supply :

The one uses an LM317 Regulator and the other a LM338 Regulator and a 741 op amp

The transformer and rectifier needs to handle 10-15 amps

I built mine into an old inverter box, which already had the 10 Amp Transformer I needed for the project.
 

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Last edited:

Just John

Photon Sorcerer
Joined
Aug 15, 2020
Messages
2,446
If "electronically inclined", one can build a cheap 10amp power supply :

The one uses an LM317 Regulator and the other a LM338 Regulator and a 741 op amp

The transformer and rectifier needs to handle 10-15 amps

I built mine into an old inverter box, which already had the 10 Amp Transformer I needed for the project.
As an FYI to anyone wanting to build this:

Lots of parts missing on those schematics, transformer, bridge rectifier, and a LOT of capacitors. Probably a lot more.
 
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