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.
This circuit uses only transistors, producing a pseudo-sequential effect with 6 LEDs. The circuit is...
A capacitor stores electrical charges. This component is formed by two metal parts called...