Here i wanna explain some basics on how to build small power supplies (constant voltage). For this, we need to differentiate between two categoriers:

  • LPSs (Linear Power Supply)
  • SMPS (Switching Mode Power Supply)

While LPSs only can take a higher voltage and output a lower voltage, SMPSs also can take a lower voltage and output a higher voltage. But there are a lot of differences in the schematics.

I presume that you already know how to use a transformer and that you have to rectify and filter the output voltage. In my opinion this is basic knowledge. Because of this I will only regulate DC-voltage.

Please keep in mind that this website is about my projects. I will only present the types of Power supply i alredy built and used. If you want to build Half- and Pull-Bridge Push-Pull-Converters, please look elsewhere for them. Also i will not show how to build high voltage or high power (>500W) power supplies, since i don’t have any use for them. Most of the power supplies will be in the range of 0-40V, since i really don’t need any higher voltage.

I will not explain how every single power supply works in every article. Because of this the articles are based on each other for the working mechanics.