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.
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
The circuit we present is suggested by Linear Technologies (www.linear.com) and makes use of an...
Found in American documentation from the 90s, this circuit can be used as a shield with the...