The purpose of this circuit is to indicate which of the two cars crosses the finish line first on a slot car lane. The circuit is from an 80's Popular Electronics.
This is a traditional double timer configuration with the 555 found in a 1987 documentation. The...
This circuit is from Radio Electronics from February 1987. The frequency is given by the crystal that...
This digital electronic game circuit was found in a 1982 publication. It randomly draws the...