This windshield wiper interval switch was found in the April 1990 issue of Radio Electronics magazine. The circuit uses integrated circuits that are still readily available.
Found in an EDN from the 80's, this circuit makes use of an operational one of the time. The...
This circuit was found in a 1962 publication. At the time there were high voltage batteries like the...
This circuit was found in a Motorola Manual of 1965. The circuit has neon lamps as trigger...