https://www.nixieclock.biz/
Nixie & Numitron Retro Clock Kits | nixieclock.biz
Shop handmade Nixie and Numitron clock kits. Factory assembled or DIY build kits with WiFi NTP sync, open source firmware, and easy tube replacement. Ships...
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https://www.adafruit.com/product/3117
Fibonacci Clock Kit : Adafruit Industries, Unique & fun DIY electronics and kits
Here at Adafruit we love a good clock kit. We also love integer sequences, dating back to Sanskrit prosody, that are named after Italian mathematicians - which...
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