Uploaded August 2024 | Updated September 2026, 1 week ago

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Fixing a digital stopwatch (or stopclock) with nixie tubes from the early 1980s made by ZPA Pragotron in Czechoslovakia. Exploring what's inside and how does it work, thermal imaging, explaining the schematic with a 7400 TTL logic, building a replacement for the missing remote control.

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This stopwatch on my website:
danyk.cz/ds35_en.html

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