Arduino master and 2 attiny85 slave
In this video, an two Attiny85 are connected to an Atmega328 and an LCD screen.
Each of the attiny85 is measuring the voltage of a single lithium-ion cell. The data is sent over the I2C bus to the Atmega328 that displays the voltage on the LCD screen.
So far the voltage measure is consistent and quite accurate (provided that Vcc is measured and taken into account in the code).
Tools, Equipment and components used:
GoPro action cam
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Mobile phone camera
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Arduino Uno
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2004 LCD Screen for Arduino
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Soldering Station (Hakko)
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Solder wire
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