This circuit was found in an EDN from the 90s. The circuit employs a double 555 and uses the courtesy light switches of the car as sensors.
This AM micro-transmitter with power that can reach a few meters is from a publication from the...
This circuit is from an American publication from 1978 and can currently be assembled with minor...
When the power is cut off, this circuit keeps the flashlight on for a while, allowing it to be...