This battery voltage indicator electronic project is designed using
linear voltage indicator SN16889 (manufactured by Texas Instruments) or
MC16889 (manufactured by Motorola). The circuit below allows lighting,
depending on input voltage of one or more LEDs. Maximum voltage at which
all LEDs light is adjusted using potentiometer P1 to 15 volts. D7 can
be red LED indicates a battery voltage too high. D6 LED green indicates a
correct value and the battery voltage LEDs D5, D4 and D3 yellow
indicates a battery voltage too low.
Battery Voltage Indicator Circuit Diagram
Battery Voltage Indicator Circuit Diagram
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