This circuit was found in an American documentation from 1970. We can increase the number of multiplier steps to have higher output voltage. The operating frequency is around 1.35 kHz.
This circuit controls two relays from a single temperature sensor. The first fires when the...
This converter converts a signal in the 200 kHz to 3.8 MHz band into frequency signals that can be...
Found in a 1980s American publication for amateur radio this circuit uses components from the era. The...