This switched power supply was found in a 70s documentation. The basic components are from that time. The circuit operates at 200 kHz and has a ripple below 200 mV.
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...