Obtained from a 1969 documentation, this circuit can operate at frequencies up to 500 Hz, counting up to 999. The circuit makes use of neon lamps of the time.
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...
This circuit keeps a flashing LED when a balcony lamp, for example, is turned off. As a result,...
This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps....