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.