Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the relay. The circuit is from 1986 documentation. The transformer has 12 V of secondary.
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...
This circuit trips with negative pulses and the value of C depends on its intensity. C1 determines the...
The integrated circuit is not common nowadays since the configuration was obtained in Motorola's Linear...