With this circuit it is possible to measure RF signals with a common multimeter. Signals up to 200 MHz can be detected. The diode supports general-purpose equivalents.
This circuit, from a 1990 documentation, can serve as a basis for a game of target-game. The...
Using a piezoelectric sensor of the time, this circuit was found in the February 1994 issue of...
What differentiates this circuit from the previous one (CB15613E) is the non-need to use a...