Ultra-Low Power Arduino System: 2-Year Battery Life?
2025-07-20
This article details an ultra-low-power Arduino system based on the ATmega328. By minimizing hardware and utilizing the sleep functionality of the JeeLib library, the author reduces the system power consumption from 6.7mA to 43μA, significantly extending battery life. The article thoroughly explains the hardware connections, software programming, and power consumption test results, and uses a temperature sensor as an example to calculate the system's battery life in a real-world application, estimating it at up to two years.
Hardware
low power