This circuit with a few watts of power was found in the April 1995 issue of Electronics Now magazine. The voltage obtained and the efficiency depend greatly on the transformer.
We found this CMOS circuit for excitation of a relay in an old documentation. The transistor is a...
This circuit can function either as a crystal or galena receiver with a pre-amplifier using a FET...
This Headset Coupler or Phone Patch was found in an American 1980s amateur radio documentation. The...