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Low voltage warning beeper circuit with CA3160

2016-02-21 08:51  
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Low voltage warning beeper circuit

Low voltage warning beeper circuit

Welcome back to Free circuit dot com for today we have the electronic circuit,This circuit is an alarm circuit for low battery status. It gives an audible and visual low voltage 12V battery powered devices. If the battery voltage exceeds the limit set (typically 11V), the circuit is idle. If the battery voltage must be below the setpoint, the LED and the speaker will beep periodically to warn of the impending loss of power punches. The circuit was designed for monitoring solar energy systems, but it can also be useful for automotive and other 12V.

How does it work?
U2 has a market regulated 5V voltage reference. U1 is wired as a comparator compares the voltage fixed 5V regulated voltage at the wiper of VR1, which is proportional to the 12V. If delivery is below the setpoint, the output of U1 goes low, turning on Q1 and food for the beep and the LED.

The acoustic signal consists of U4, a tone generator, and U3, a pulse generator with low duty cycle. The tone can be varied by adjusting R7, the beep rate be changed by adjusting R5. A small amount of hysteresis is provided by R1 and the current through LED1 and the beeper, which separates the points on and off the circuit.

U2 has a market regulated 5V voltage reference. U1 is wired as a comparator compares the voltage fixed 5V regulated voltage at the wiper of VR1, which is proportional to the 12V. If delivery is below the setpoint, the output of U1 goes low, turning on Q1 and food for the beep and the LED.

The acoustic signal consists of U4, a tone generator, and U3, a pulse generator with low duty cycle. The tone can be varied by adjusting R7, the beep rate be changed by adjusting R5. A small amount of hysteresis is provided by R1 and the current through LED1 and the beeper, which separates the points on and off the circuit.

Beeper use low voltage battery
Connect the circuit to the 12V source you wish to attend. Turn on S1, if the battery voltage exceeds the set value, nothing should happen.

If the battery voltage drops below the set value, the LED  light and a buzzer will periodically speaker. If the beep is annoying, turn off S1. Make sure the battery fast charge, over discharge, the life of most rechargeable batteries shorten.


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