Battery AA Tester with LEDs - Arduino Nano
thingiverse
This is a simple Battery AA tester based on Arduino. To work it needs to connect arduino to power. Then insert a battery and results is in LEDs - red, yellow and green. The idea is from: https://www.instructables.com/Arduino-Battery-Tester/ I just created a box. The battery holder is borrowed from another Thingiverse but I cannot find it now. You just need to print, connect Arduino with resistors and LEDs, connect wires to battery holder and thats it.
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