when the battery voltage will falls below 6V.
The circuit can be used with all types of 6V batteries. It can also be used with all types of 6V sealed lead acid and lead acid batteries. The heart of the circuit is a 555 timer IC that is used as a comparator in the circuit.
When the circuit is completed it requires some calibration for the first time. For calibration take an adjustable power supply, set its voltage to 5.9V and connect it in the place of the battery. Now adjust the 10K variable resistor until the LED and the relay will become off. Now increase the voltage of the power supply to 6V to 6.5V the relay and LED should be switch ON and again set the power supply to 5.9V now the relay and LED should be switched off. After these adjustments are done connect a fully charged 6V battery in the place of adjustable power supply.
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This article describes a simple project of an automatic low battery cutoff or disconnect circuit for 6V batteries using 555 IC. As you know that a deep discharge or completely discharging a battery is harmful for the life of the battery, so the circuit shown here will disconnect the battery
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