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Car voltage supervisory circuit

2017-01-15 19:09  
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Car voltage supervisory circuit
This cirucit is suitable for monitoring whether the 12V car power voltage is normal. If the power voltage is between 12~14.5V, then it is normal; if the voltage is lower than 12V or higher than 14.5V, the indicator light will shine respectively. A1, A2 are indicator light comparators,they areused to adjust potentiometers W1, W2. When the car power supply is higher than 14.5V, B light turns on; if the power voltage is lower than 12V, A light turns on; if it is normal, the two lights are all off.