Here you will find some of my projects related to electronics and amateur radio. Please do not copy anything without permission. Also note that if you want to build something you are doing it with your own risk. Electricity might kill or burn your house. Don’t build if you don’t know what you are doing. I don’t take any responsibility for anything. If you find some incorrect information and mistakes please let me know.

In English

Simple board for GPS-module

UTC-clock with GPS synchronization

5V regulation board using LM2575N-5.0

Lead-Acid battery charger

CAT interface


In Finnish

Digimode interface

2m PreAmp

Bandidekooderi / antennin vaihtaja