We found this circuit in the Electronics Experimenter Handbook magazine from 1993. L1 has 2 = 2 turns of 28 or 30 wire in the shape of 0.5 cm without core. The range reaches a few tens of meters.
July 21, 2015 - Mouser Electronics, Inc. is now shipping the Curiosity Development Board from...
In this circuit, the output voltage is slowly established, thus avoiding the impact when...
This circuit is from an old Italian publication, being used in record players with crystal...