This windshield wiper interval switch was found in the April 1990 issue of Radio Electronics magazine. The circuit uses integrated circuits that are still readily available.
This didactic circuit was found in a 2001 documentation. It presents the result of programming in binary...
This VFO circuit generates signals from 2 Hz to 50 Hz. We found it in Popular Electronics from...
This circuit can be used as a buzzer from 3 different locations, allowing you to identify where it went...