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.
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...
We found this circuit in an Electronic Engineering from the 90s. It applies to any logical family....
This circuit is from a documentation for 1976 radio amateurs. We can implement this circuit with...