This circuit was found in Motorola documentation from 1968, using high power transistors and operated at 580 Hz. The circuit employs a special transformer.
Found in documentation from the 1970s, this circuit uses an oscillator and a display to warn of...
This simple voltage-controlled oscillator generates signals from 300 Hz to 1,500 Hz with voltages from...
This circuit is used with low impedance microphones, such as small speakers, magnetic capsules of...