Operating at a frequency of around 180 kHz, this transmitter was found in a Science & Electronics of 1970. The coil has 34 turns of 22 wire. The transistor can be the 2N2222.
We found this circuit in a Radio Electronics from October 1963. The circuit uses an output...
This circuit from an American documentation from the 70s, indicates a photodiode to generate...
This circuit uses components that are still common despite being from 1995 documentation. The circuit can...