This circuit was obtained in an American documentation from the 90's. The circuit can be implemented with some equivalent components, such as transistors and TTL logic circuits.
Placed near a telegraphic transmitter (CW) and with a small antenna or pickup, it reproduces the...
Mouser Electronics is making available the Texas Instruments DRV401 Q1 integrated circuit, a...
Found in a 90s nHands On Electronics, this circuit triggers a relay that shuts off the load when...