Here are some electronics projects I built.
- Home-made isolation
transformer with series light bulb circuit
- Packet Radio with
the PC soundcard: HF isolator circuit with optocouplers
- Solar cell
charging regulator after a Siemens schematic
- Switching a laptop on or off via telephone (in German
Laptop einschalten und ausschalten per Telefon)
- The Yakumo Hole (in German only:
Please note that building these circuits
occurs on your own risk! If you are not sure what you do here, leave it. I
do not assume responsibility for any damage you or any equipment may suffer
from building or using these circuits. Please respect the common security
guidelines when working with electric equipment. A description of these can be
found at the sci.electronics.repair FAQ.