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 sensor component used in this project is not common today as it is an 80's design. The circuit...
This circuit detects sunlight at dawn by triggering an audio oscillator. The photo transistor can be of...
This small 3 transistor transmitter was found in an English publication from 1963. The coils must...