BJ-1 buzzer, alarm, anti-theft alarm, buzzer is an integrated electronic sounder that uses AC or DC power supply. It is widely used as a generating device in electronic products such as computers, printers, photocopies, alarms, electronic toys, automotive electronic devices, D-phones, timers, etc. The buzzer is mainly divided into two types: voltage type buzzer and electromagnetic type buzzer. The buzzer is used in the circuit with the letters "H‘" or "HA”" (used in the old standard with "; FM”、“ZZG”、“LB”、“JD” In the design of microcontroller applications, many solutions use buzzers, most of which are used for prompts or alarms, such as pressing buttons, starting work, ending work, or malfunctions. Here is a description of the application of microcontrollers in buzzer driving. Squid self-excited buzzers are driven by DC voltage, and do not require AC signals for driving. Simply output the driving level to the driving port and amplify the driving current through a three-level transistor to make the buzzer sound. BJ-1 buzzer alarm anti-theft alarm. Shandong Zhuoxin Machinery Co., Ltd. is located in the economic capital of Shandong, China. It mainly engages in the production and sales of instruments, automation equipment, and complete sets of supporting products. Its main products are sold to factories, mines, power plants, and universities all over the country. Our products include non-destructive testing equipment, ultrasonic thickness gauges, coating thickness gauges, vibration gauges, noise gauges, infrared thermometers, pressure gauges, pressure controllers, oscilloscopes, power supplies, bimetallic thermometers, thermocouples, thermistors, temperature transmitters, proximity switches, rope switches, deviation switches, push-pull force gauges, testing machines, and other supporting products< br />