One piece of equipment that all electronics hobbyists will find useful is a variable power supply. There are some great ones out on the market with all the features you could ask for. These can run around $100 and up (and worth every penny).
After getting inspiration from some great projects out there, I decided it was time to try to make my own power supply. Some of the features I wanted to build into it were:
- Variable power from +1.5V to +24V.
- The ability to set (constant) current level.
- Up to 2A current.
- Digital display
- Measured using an embedded arduino microcontroller.
I found the project to be very rewarding. All in all, I probably didn’t save much money but I definitely learned a lot and got the satisfaction that only comes from building something yourself!
Here is an inside picture of the final project. All Schematics and Eagle board layouts are attached. Feel free to use and modify as needed. Good luck!