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 is from an old Electroics Now. Its purpose is to protect the fax and modem lines of...
We found this circuit in a 1994 publication. It makes use of a divider for 16 384 CMOS type 4060. By...
The circuit of a 1968 publication can be implemented with more modern transistors such as BC548 for...