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 amplifier circuit for instrumentation was found in the manual of the used integrated circuit...
This circuit is intended to warn you if you forget to turn on the lights. We found it in old...
The zener diode determines the triggering of the circuit and R3 must be a resistor that will be...