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.
Critical components of this project are the Geiger tube and the 300V battery. The battery can be...
Using the four amplifiers of an LM324 this circuit was found in the June 1996 issue of Electronics Now...
This circuit was found in a Popular Electronics from the 90s. Transistors admit equivalents, as well as...