Buzzer 3 pin shielded inductor

Tripod inductor, also known as autotransformer, is a transformer with only one winding. When it is used as step-down transformer, a part of the wire turns are drawn out from the winding as the secondary winding; when it is used as step-up transformer, the applied voltage is only applied to a part of the wire turns of the winding. Generally, the primary and secondary windings are called common windings, and the rest are called series windings. Compared with ordinary transformers, the autotransformer with the same capacity has smaller size and higher efficiency, and the larger the capacity of the transformer, the higher the voltage. This advantage is more prominent.