How do you create an AC current that changes directions using transistors?

Question

How do you create an AC current that changes directions using transistors?

In: 1

Answer 1

One way is an oscillator, wchich is a circuit that feeds back its output inverted (positive to negative or vice versa) to its input, with a small time delay. So a circuit with a positive input produces a negative output which feeds back to the input and switches it over again (and again….) The output is then switching positive to negative etc all the time and so the current goes back and forth.