From an audio signal, this circuit gets two signals of the same amplitude and opposite phases. This setting is widely used in bridge amplifiers (BTL). Transistors may be commonly used as BC series.
This circuit activates a piezoelectric buzzer with an oscillator at the end of the programmed...
In this 1970s receiver, the coil has a primary with 100 turns and a secondary with 20 turns, both...
Found in old American documentation, this circuit is intended for the control of heating elements. The...