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.
Found in American documentation, this circuit from the 90s uses components from that time. The...
This circuit was found in a 1980s documentation. The operational amplifier is of a common type at the...
This simple audio and RF signal tracker was found in a Japanese publication in 1967. The...