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 TTL traffic light circuit was found in an English magazine from 1977. The magazine no longer...
This 1968 documentation circuit uses a relay to control loads up to 1 kW (depends on relay...
We found this circuit in a 1967 RCA SCR manual. The circuit uses components from the era. The...