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A multi-channel wireless (2.4GHz) voltmeter display using ATTINY402, Arduino nano, NRF24L01+ and 128x32 I2C OLED.

The transmitter is optimised for low power and will run from a battery for weeks or months depending on usage, sample frequency and of course battery capacity.

Range is a few meters to tens of meters depending on how well the radio module is isolated from the controller, and the RF power setting.

I did the project as an exercise in minimalism.

Developed on Arduino”

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