Buzzer ky012

  A. The role of the buzzer: buzzer structure of an integrated electronic transducers, using a DC power supply, are widely used in computers, printers, copiers, alarm, electronic toys, automotive electronics, telephones, timer for sound devices and other electronic products. Two. Buzzer Category: mainly divided into the piezoelectric buzzer and magnetic buzzer, the two types. 3. Circuit graphic symbol of the buzzer: buzzer in the circuit by the letter ""H"" or ""HA"" in (the old standard ""FM"", ""LB"", ""JD"", etc.).