This simple bridge circuit can be used for impedance or resistance measurement using a high impedance earphone as an indicator. The circuit is from an American 80's documentation.
With an ultra-low consumption, this circuit can be powered by solar cells. The circuit is from a...
This circuit was found in a 1967 Electronics World. SCRs are according the controller load,...
Current sensors of the type High-Side (high side) are circuits that monitor the current drained by a...