MullOverThings

Useful tips for everyday

# How does Arduino measure power consumption?

## How does Arduino measure power consumption?

In order to measure energy consumption, you need to use a shunt. A shunt is a resistor which you put in your electronical circuit: when current go through the little value resistor, a differential voltage is created. Energy can be calculated with the Ohm law : Power = Voltage x Current.

## How can I monitor my home power consumption?

To get specifics regarding your energy usage, you only need one tool, really: an electricity usage monitor that tells you exactly how many kWh a device or appliance is drawing. The monitor can be as simple as a “plug load” monitor that plugs into an outlet; then you plug the device/appliance into the monitor.

## 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 does power consumption affect the battery life of an Arduino?

Understand Arduino Power Consumption and extend the battery life by reducing Arduino’s current draw in 26% to 97% The ATmega328p is the microcontroller on the Arduino Uno board. It doesn’t need a lot of current, and you can even set it into sleep mode. But there is also a chip on the board for usb-to-serial and a led and a few other components.

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

The clock speed in your Arduino board determines how many operations it can perform per second. Most Arduino boards run at 16MHz of clock speed. Reducing this to 8MHz can drop the current needed from 12mA to 8.5mA. In the long run, it can cut off much of the power consumption and extend battery life.

## What is the power draw of an Arduino?

This will be a big one! This board is simply the Arduino chip running at 8MHz 3.3v, as opposed to Arduino UNO’s 5V 16MHz. It turns out there Arduino Pro runs at 8MHz 3.3V, so that may be the easy path for power draw reduction 1456! big number! But notice I change the multimeter scale from mA to uA. So current went from 32mA to 1.4mA! Wow!