Car battery voltage indicator. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Car battery voltage indicator. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Automobile. Batteries, chargers

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This simple diagram will help you quickly determine whether the battery in your car has died or not. The schematic is here:

(click to enlarge)

So, there are three LEDs that will light up depending on the voltage of the on-board network. If the voltage is 10V or less - the HL1 LED is on - it is better to take it in red. If the voltage is 11 ... 13V, yellow HL2 is on. If the voltage is 14V, the red HL3 will light up.

LEDs can be used in any appropriate colors. Transistors KT315B and KT361B can be replaced by KT3102BM and KT3107B, respectively. Zener diode D814V can be replaced with KS510A, and D814D with KS512A.

See other articles Section Automobile. Batteries, chargers.

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