Electronics & High Voltage

Because I took my amplifier and speakers to my other room in the city where I study I needed another solution for playing music in my hobby room, which is still located in my parent’s home. Luckily, I had two active speakers and a matching transformer (both from a broken Sony radio) lying around. Because [...]

Well, since me and a friend are still “working” on our spark gap tesla coil without any progress whatsoever for the past three years or so I decided I should make a small tesla coil myself just to finally see some sparks (altough I must’ve watched hundreds of videos on the subject, I have never [...]

A library for communicating with a PS/2 keyboard on an AVR microcontroller. Supports bi-directional communication and is completely non-blocking.

Recently I was browsing ThinkGeek when I came across a little gadget called the annoy-a-tron. It’s a device that you can hide somewhere, turn it on and then it gives a short 2 kHz or 12 kHz beep every two to eight minutes. According to the site, this is extremely annoying for any unsuspecting victim. I made my own version.

An assembly to switch high currents using a car starter relay.

An alarm clock that’s guaranteed to get you out of bed on time.

My best capacitor charging device so far. Charges caps to 400, 800 or 1200 V at a high power.

My first and so far only coilgun. The energy it uses is around 560 joules at 395 volts.