small active buzzer ky 012 diy module
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. . |