When I wasn't getting cold and wet outside I've been doing a lot of reading about Nixie tubes and neon indicator lamps. I'd heard of Nixie tubes and even have an old piece of test equipment with a few in it, but they were obsolete before I was born so I've never worked with them. Recently there has been a resurgence in their popularity, usually in the form of digital clocks, as people come to realise that they actually look a lot prettier than the seven segment LED displays that replaced them. You can still buy them as New Old Stock even though the last factories that made them closed down shortly after the fall of the Soviet Union in 1991.
Neon lamps are still commonly used as a power indication light in mains-powered equipment such as multi-way socket adapters. I didn't know that Nixie tubes are basically glorified neon lamps, and I had no idea how versatile the lamps are. They were even used to build digital logic gates in the days before semiconductors took over. Don't believe me? Take a look at this!
You might be wondering why I've suddenly developed an interest in obsolete optoelectronics. The reason is that I've decided to use Nixie tubes for the score display and an array of 200 cheap neon lamps as the main display of my retro-futuristic Tetris machine. I originally wanted to build a mechanical display but it proved impractical and would have cost far too much for the parts.
Next weekend is starting to look a bit busy. I'm going to the Morris Minor Owners' Club AGM in Derby on Saturday, a vintage slot machine fair in Coventry on Sunday, and at some point I need to pick up a heater for Fenchurch from a bloke who lives near Birmingham. I'm thinking of trying to stay in the Stratford upon Avon YH on Saturday, and if I do that it might be worth also trying to see a play at the Royal Shakespeare Company's Courtyard Theatre (they'll be performing Henry V).