Linear Amplitude Modulator (CB21087E)

Found in an Analog Devices documentation from the 90s, this circuit uses a component of the time, not common nowadays.

SCR Light Alarm (CB12197E)
When the light falling on the sensor is cut off, the SCR fires, powering the lamp. Remember that...
Swimming Pool Alarm (CB15051E)
When the sensor is wetted by a spray caused by someone falling into a pool or even by a wave...
Debounced Switch 7404 (CB3861E)
This traditional TTL anti-clock setting was found in a 1993 American documentation. The circuit...