The WD media player is an excellent player for all kind of movie files – but it lacks one important feature: volume control. I’ve hooked up a pair of Bose speakers directly to the WD and can only change the volume on the Bose device. This is very unpractical e.g. when working out. Therefore I’ve created a device that can control the volume via any IR remote control. I use the WD remote control’s up and down buttons to control the volume via two digital potentiometers. Everything is connected to a PIC micro controller that operates the whole device. Continue reading Universal Volume Control
A while ago, I decided to build my own Geiger-Müller counter to be able to measure radioactivity myself. After Fukushima, all reasonable priced counters were sold out, so I’ve decided to build mine based on a Velleman Kit. (K2645) Continue reading Geiger-Müller Counter Project
The LocalLink controller was my first and only chip design project. It was part of my studies at the ETH Zürich, done in collaboration with my colleague Alex Hueber.
The chip implemented the LocaLink protocol for AppleTalk networks. It was used to connect PC printers to the AppleTalk WAN. A total of 10 chips were fabricated in a CMOS 1.2µm process.
I’ve created a 4x4x4 LED cube from a ELV kit. It’s pretty easy to build, but the software for the animations is quite tedious to use.
I bought a Blue Mikey microphone for iPhone/iPod to do recordings of concerts and other events. To test it out, I went to a local carousel and made a recording of the barrel organ. I used the free Blue Fire software and started recording. I’m pretty impressed by the sound quality. There was quite some wind and a lot of noise from the people around.
I used Audacity the reduce the rumbling noise from the wind – other than that, it’s the original recording. Check it out (mp3)
The next time I’m going to visit the Musikautomaten Museum in Seewen, I’ll also bring this along and do a couple of recordings.
We added a couple of new items to our www.apple-forever.com Apple collection. Several Powerbooks and other devices. Check it out!
Finally, a new addition to our apple-forever collection!
I’ve planned to use this machine as a simple web/file server, because of its silent operation. Unfortunalety, even when the display turns off, the heater for the vacuum tube is still running (to keep the air flowing from the bottom to the top) so power consumption was inacceptable. I used an old blue/white G3 instead.