Suggested by Amperex in 1968, this circuit is intended for hearing aids. The integrated circuit used, a TAA370 is not common today.
The game is an adaptation of the real version where the toothpicks taken are replaced by red LEDs...
We found this circuit in a 1971 documentation. The circuit can be assembled with more modern...
We found this capacitive relay circuit in a 1967 Japanese documentation. The circuit is sensitive, and...