This interesting sensor for RF signals was found in an article in the June 1989 Radio Electronics magazine. It is a field strength meter with an LED bargraph indicator.
May 2017 - This new Ricoh 4 A current device is now available from Mouser Electronics. The device...
The purpose of this circuit is to disconnect the battery in case of an excessive charge current,...
This circuit produces signals that depend on the input control voltage. It is a Voltage Controlled...