This circuit activates a garage door by the car headlights car or a lantern. The circuit is from a 1967 documentation, making use of period components.
Indicated by Popular Electronics to be used with a car headlight, this circuit can also have...
In this circuit of a 1970s publication, data from the coil to oscillate at the desired frequency...
This circuit was obtained from a Philips documentation from 1968. The transistors can be replaced...