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 full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
This circuit is from a 1968 documentation. It makes use of thermistors (NTC) to indicate...
This small transmitter has an RF amplifier stage with coupling made from the central socket of the...