This General Electric circuit was found in a 1964 documentation. The circuit triggers a relay when the sensor is activated. Trigger adjustment is done in a trimpot.
The frequency of this oscillator is determined only by the crystal, without the use of tuned...
This circuit can be used to produce the sound of bongo drums. Damping is adjusted by P1. The...
This circuit is from a 1965 General Electric manual. It uses components from the time that admit...