The integrated circuit used in this regulator is not common today. The circuit is from a technical documentation from the 80's and is only used as a reference for eventual repair.
This gun-like sound effects circuit is based on the PLL4066. The circuit was found in the December...
The output current of this circuit reaches 12 mA. The zener diode determines the output voltage. The...
The circuit shown in the figure can serve as a basis for frequency meters, clocks. Stopwatches and many other...