Last Xmas, I gave you my ... InSpiral Christmas Tree with a flexible printed circuit board

3,604 views · Published 10 December 2014 · 1:15 · Indexed 26 September 2026

Channel: Elektor TV · 2014 · Science & Technology

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Christmas trees are available in all shapes and sizes, also electronic ones. Elektor had a bright idea of doing it differently: a cone like spiral. LEDs are placed along the spiral. The choice was made to control the LEDs with an old fashioned logic circuit. It’s a simple random generator build-up of a shift register (4015, a dual 4-bit static shift register) and a 2 EXORs (4070, Quad Exclusive-OR Gate).

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