It actually consists of a tunable field strength meter. The circuit is of an old documentation and the circuit must be tuned to the frequency to be monitored. The circuit offers the option to use a headset.
Suggested by an American publication, this circuit has 5 operating conditions indicated in the...
This circuit controls a heating element using a triac. Triac must be fitted with a heat sink. We...
This small fluorescent lamp inverter (up to 20 W) can be powered by 12 V battery and even less. The...