This game for 4 competitors was found in a Popular Electronics from the 80's. The circuit has CMOS technology and can be powered by voltages from 6 to 12 V.
Found in EEE documentation, this circuit can have the duration and frequency adjusted separately....
August 2016 - Mouser Electronics is providing the ew converters step down LM53625-Q1 and...
The circuit is from a 1966 English magazine, but it can be assembled with more modern transistors such as...