this a simple 12V cutoff circuit using NE555 and LM324 this is how it works at normal voltage say from 12V to 10.8V the circuit works fine at 10.7V the yellow LED comes up NOTE (It buzzer but I use LED to make it visible) and at 10.5V it will start blinking(the(the blinking is a warning sign that your system will soon go off )once the voltage drop to 10V the yellow Led goes off and the Red Led comes up indicating low battery and the system will shutdown
NOTE: FOR 24V THE VALUE OF THE COMPONENT WILL CHAGE
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