The L1 coil is formed by 4 turns of wire 20 in the form of 0.5 to 0.6 cm without core. The circuit is from an 80's documentation. The range reaches a few tens of meters.
This hybrid power supply circuit was found in the August 1997 issue of Electronics Now magazine. The...
This circuit with the NE602 was found in the February 1997 Electronics Now magazine. The NE602...
This simple circuit can be used to power a simple communication system using ordinary telephones....