This circuit was found in the 1991 Electronics Experimenters handbook. It can be used to display RGB signals on old NTSC televisions.
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...