The transistor can be a BC548 and the coil has the following characteristics for 1 MHz. L1 has 80 turns of wire 28 in a ferrite rod and L2 of 30 and 40 turns.
The frequency of this circuit can be varied from zero. The circuit uses the CMOS 4046 and was...
This circuit detects the sound of thunder, assessing its intensity and thus the distance of a...
This circuit was found in a 1965 General Electric manual. It is intended for cars that have...