This circuit was obtained from the PE Hobbyist Electronics publication of 1980. The circuit is based on the 555 and is simple to assemble and can be used to control the brake lights.
This circuit is used to obtain the synchronized activation of a mechanical battery clock. The...
ON Semiconductor Phototransistor Output Optocouplers Available from Mouser Electronics is the...
Found in an Electronic Design from the 80's, this circuit monitors a three-phase line, activating a...