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aa-battery

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bdoole1 / arduino-battery-checker

Arduino UNO AA/AAA battery checker with 16×2 LCD, Serial logs, and optional LED gauge. 1.1 V ADC ref, mV display, presence hysteresis.

arduino electronics maker stem arduino-uno alkaline lcd-16x2 battery-tester aa-battery aaa-battery

Updated Aug 31, 2025
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