12V Battery Low Voltage Alarm Buzzer LED Undervoltage Alarm Module

1. The scope of application of this module:

Mainly used for battery (9V or 12V) voltage monitoring, simple and practical, with sound and light alarm prompts.

2. Product function:

After the battery is under-voltage, the buzzer will make a "dididi" sound, and the red LED indicator light will be on at the same time. When the battery voltage rises above the set value, the buzzer will stop alarming.

2. Brief description:

1. Size: 3.0CM long * 2.9CM wide * 1.4CM high

     Fixed hole distance: 2.2CM fixed hole diameter 3MM

2. Main chip: LM358;

9V battery: When the battery is over-discharged (the battery voltage is lower than about 8V) , the red indicator light is on and the buzzer sounds to realize the sound and light alarm, so as to realize the discharge status of the battery to prevent the battery from being over-discharged and damaging the battery;

12V battery: When the battery is over-discharged (the battery voltage is lower than about 10.4V), the red indicator light is on and the buzzer sounds to realize the sound and light alarm, so as to realize the discharge status of the battery, so as to prevent the battery from being over-discharged and damage the battery;

Three advantages:

1. With sound and light alarm, it is directly clear whether there is a protective effect;

2. The module input is equipped with reverse connection protection, and the input power supply will not burn out if the polarity of the input power is reversed. But there is no overvoltage protection, if the input exceeds 15V, the chip on the module will burn out.