The circuit presented was obtained in a technical documentation from National Instruments. The low-consumption circuit supplies a common LED with a voltage of just 1.5 V.
This S-meter or signal strength meter, was originally designed for the 80's Regency receiver, but can...
This circuit is intended to reduce the 12V from a car outlet to 9V. The current is in the order of a...
This sensitive millivoltmeter for alternating voltages was found in a French publication in 1996...