There are usually several adverse situations that occur during the use of the buzzer:

1 type: If the buzzer does not sound before installation, it is due to poor quality of the buzzer itself (this situation is more likely to occur with the first type of buzzer)

2 types: If there is no sound or intermittent noise after welding, this situation may be due to the excessive power of the soldering iron used during the welding process (it is recommended to use a 20-30W soldering iron) or the long time (it is recommended to complete a solder joint within 3 seconds), which causes the pins of the buzzer and the solder joints of the coil to melt due to heat and result in virtual soldering.

3 types: During the process of the buzzer sounding after welding, there may be a low, no sound, or sand sound that changes tone. This situation may be caused by the current that starts the buzzer being too small or too large (the normal working current of the buzzer is 20-30mA), resulting in the buzzer not sounding properly.

4 types: If the buzzer changes sound or has no sound after a period of use, this situation may be due to the continuous beeping time of the buzzer being too long (the continuous beeping time of the buzzer cannot exceed 8-10 hours, otherwise it will change sound or burn out) or the buzzer being affected by the environment. There are 5 cases where the buzzer changes pitch or produces no sound when working on the wire board after welding, but when removed and tested with a DC stabilized power supply, there is no problem. This situation may be due to interference with the buzzer.

The above 5 situations are the most common faults that occur during the use of the buzzer, and other fault situations will not be described here.

When choosing a buzzer, one should not solely focus on the price and ignore the characteristics of their own circuit. Choose a buzzer based on the design characteristics of your electronic product circuit, in order to effectively avoid the five types of adverse phenomena mentioned above. If the circuit design of electronic products has strict requirements for the current loss of electronic components, when the starting current of the buzzer is less than 10mA, the buzzer manufacturer can be matched with a low current loss buzzer.