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)
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.