Monday, April 23, 2012

A Lab PSU (Power Supply)

Two years I was wondering which Laboratory Power Supply to buy. I looked over Agilent and some Musteks, but most of them are expensive for me.

Now I decided to build one functional and cheap. What I do need:

- 3A max current
- 0-30V variable voltage
- variable current

Here is the choosen schematic. After reading on the forum I saw that the schematic has big issues fortunately a friend from out Bulgarian Audiophille Forum has made good work and I just got his PCB error free.
This is his website go and check the real deal

I added a termocontroller with a fan because the module can quickly overheat with this small sink I have for the main power transistor if you push it a lot.



  1. Thank you for this very informative blog. You have made sense of this topic by writing unique, original content. It’s easy to read, engaging and smart. Blogs of this caliber are few and far between.
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  2. I am glad, that you added pictures to the article. I guess, everyone will agree, that it really helps to understand the process better.