Using a common crystal diode and a 741, this circuit can be used to detect microwaves. The circuit is from old documentation and the switch selects the gains.
This circuit is from 1995 documentation. The power depends on the transformer, which in this case...
This circuit was found in an American 1980s documentation. It is a circuit that can be used to...
This circuit is based on an operational window comparator. We found it in a documentation from the...