This circuit was obtained from the Radio Electronics Experimenter magazine in a special edition of 1990. The circuit generates high voltage discharges.
This small telephone transmitter uses a telephone capsule as a microphone. The L1 coil has 4 to 5...
This circuit was found in an American documentation from the 1980s. The sensitivity ranges from...
This circuit produces a sinusoidal signal whose frequency can be calculated using the formula next...