This type of circuit and with this integrated circuit appears several times on this website. The circuit has the components dependent on the desired current in the load.
This step is also suitable for the AC188k and SK3004 transistors and was found in a 1980s...
Found in old American documentation, this circuit demodulates signals from 1 kHz to 10 kHz for...
This circuit takes advantage of the inductance of the phone in the resonant circuit. The circuit is...