Found in a documentation from the 70s, this circuit causes the courtesy light of the car to remain on for an additional time after the doors are closed. The time depends on C1.
This circuit activates a relay by activating one of a series of optical sensors that can be...
This circuit is from a 1986 Revista Española de Electrónica. It consists of an amplifier with...
We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted...