Was this the one that @CuriousMarc acquired?
The Soyuz spacecraft used a digital clock on the control panel. Surprisingly complex, the clock had over 100 ICs and a switching power supply crammed inside. I open the clock and explain what all these chips do. Details: http://www.righto.com/2020/01/inside-digital-clock-from-soyuz.html …pic.twitter.com/qG0h19Yo5q
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Yes, this is CuriousMarc's clock. He has a video on the clock:https://www.youtube.com/watch?v=JBIhzEZkWEA …
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Let's use a 10Mhz clock, we'll only need like 27 dividers :D
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The clock uses a 1 Mhz clock, so it uses six divide-by-10 chips to get down to 1 second. Even so, the clock is only accurate to 30 seconds per day.
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no luck in getting it to run?
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We haven't powered up the clock yet, but we plan to. I had to reverse-engineer the power supply to figure out how to hook it up, and then order the obscure Soviet connector from Bulgaria. We'll carefully test the power supply and then hopefully the clock will run.
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Great clock review, thank you! One small correction - these 16-pin pink chips packages are not plastic but ceramic.
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I tested it and was surprised to find that you're right! The chip looks like pink plastic but it's ceramic.
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curious about the power supply. any schematics or close to something like it up till now? would like to dig into myself :)
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No schematics except what I've drawn out. Had to beep out the circuit. Basic idea: linear regulator chip outputs 15V. Inverter makes +/- 15V and +/-20V for control. Forward converter has two 5V outputs (for ICs and LEDs). I plan to write a blog post about it.
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