This gun-like sound effects circuit is based on the PLL4066. The circuit was found in the December 1989 issue of Radio Electronics magazine and already includes a small amplification stage.
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...