This RF circuit measures transmission power from 0.25 W to 10 W. The maximum frequency depends on the diode and the gauge is an analog instrument. A multimeter can be used instead.
We found this simple music box circuit that can also be used in a musical bell in a 1991...
This circuit was found in the September 1984 issue of Radio Electronics magazine. The frequency is given...
Found in a 90s Maxim documentation, this circuit disconnects the battery in case of overload. The...