This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few mA. We found it in the Radio Electronics magazine of December 1992.
Suggested by Harris in documentation from the 80s, this circuit uses components from that time. It...
This high-voltage regulator uses only two components. The resistor is a wound wire type with 1 W...
This circuit uses an impact sensor transistor called Pitran rare today. The circuit is from 1969...