![]() With this method, the current consumption can be reduced by 83% on average compared to the reference measurement with 9V and no optimization. The best method to save energy is the to enable the Low Power Mode and reduce the clock speed so that the microcontroller can operate directly with 3.3V.If you do not want to use any power saving modes and do not need a 5V supply, you should work with the Arduino Pro Mini 3.3V. The lowest reference current consumption has the Arduino Pro Mini in the 3.3V version with 5.13 mA. ![]() Even the Arduino Mega is a bigger PCB with more electrical components build on the board, the current consumption of the Mega is lower with 73.19 mA because the Arduino Mega runs not on 16 MHz but on 8MHz.
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