This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the zener, the circuit can be used to monitor other voltages.
This circuit was found in an American documentation from the 90's. The circuit is intended for...
This circuit was found in an American documentation from the 80's. The sensor is a special...
With the presented circuit it is possible to measure resistances of many megohms using a low...