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.
This simple clock can be used to generate signals up to 100 kHz, depending on the crystal. We found...
Found in American documentation from 1964, this circuit uses transistors from that time, which are not...
This source was found in a 1982 American publication, but can be easily assembled using 2N2995 (PNP...