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Car battery condition checker

2016-05-11 23:14  
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The car battery status check circuit using CMOS IC 4081 and LED. The voltage variable resistor to set the LED lights. The car's ignition switch is set when voltage drops below 13 volts control, turn on the LED lights.

Car battery condition checker 

LED lights are usually very short period of time, because if the LED lights for a long time will make the circuit system problems.


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