http://etrex.webz.cz/hack.html
Unique light dependent resistor (LDR) in a glass case. The only one among a bunch of other more common LDRs.
Power supply and nixie tested successfully.
Tubes finally arrived from Moscow.
12V to 180V high voltage flyback power supply finally completed and tested successfully on breadboard.
Based on Ronald's circuit for flyback boost converter but with some minor changes to components which were not available locally. Basically, IRF740 MOSFET transistor, unknown Inductor, FR305 fast switching rectifier and transistor MPS-A42.
A professional bell timer Series 56 from R H Rhodes. This one is more than 30 years old and still working. In fact the same model is still being manufactured. Wow.
What's the most complicated part of your life right now? Trying to figure out how to mount a few vacuum tubes without tube sockets.
