MullOverThings

Useful tips for everyday

# How much power does a Arduino use?

## How much power does a Arduino use?

The Arduino Uno board draws about 42 mA assuming no power draw from sensors or other components needed in your system. With a minimum supply voltage of 7 volts, the power consumption of the board is therefore 0.29 Watts.

## How much power does an Arduino use per hour?

A Uno which isn’t doing anything useful except being turned on will use about 50 mA of current from the power jack at 9V. If you use 3 x alkaline AA batteries (giving a nominal voltage of 4.5V) directly into the 5V pin of the Arduino then you might get 2500 mAh which would be 50 hours at 50 mA per hour.

## How much power does an Arduino Uno consume?

Arduino Uno Datasheet

Board Arduino UNO R3
Low Power Mode [mA] 27.85
Power Consumption @ 3.3V
Reduce Clock Speed [mA] 11.55
Low Power Mode [mA] 11.45

## Can Arduino run on batteries?

Make your Arduino projects portable by using a battery for power. From the Uno and Mega documentation pages: “The board can operate on an external supply of 6 to 20 volts. You can simply connect the + end of your battery to Arduino Vin and the – end to Arduino ground (fig 1).

## What is the power consumption of an Arduino Uno?

In sleep mode, without the LED, the power consumption of Arduino UNO is just 30.8uA. One of the very easy ways to reduce the power consumption of the Arduino board is to lower the supply voltage. Arduinos can work at a low voltage of 3.3V and by dropping the supply voltage from 5V to 3.3V, current drawn drops from 4mA to less than 1mA.

## How much power does a 9V Arduino use?

With a 9V power supply only (no USB), current consumption is 26mA. With USB only (no power supply), current consumption is 35 mA. This was measured with a DMM after fuse F1 was removed (the DMM measures in series with the fuse).

## How can I reduce the power consumption of my Arduino?

For example, running the Arduino at 5V and reducing the clock speed from 16MHz down to just 8MHz can drop the current needed from 12mA down to ~8.5mA. To better understand the relationship clock speed has with the microcontroller, let’s look at the graph below.

## How much power does a SparkFun Arduino use?

The ATmega328P, used on popular boards like the SparkFun RedBoard, Arduino Uno, and Pro Mini are actually quite power hungry. The RedBoard and Arduino Uno, draw around 15mA minimum, which doesn’t sound like much but as you’ll see in this guide, we can drastically bring that down with just a few tricks.