We use Arduino boards in many of our projects. Most of the time we will power it through the USB port. But, that’s not the only way to power an Arduino. In this article we will learn about the four different ways to power an Arduino UNO review film board. While making any projects, knowing these techniques will be handy in instances when flexibility with regards to the power supply is required.
- USB Powered Arduino
The USB port of the Arduino Uno can be connected to an USB device or port that can provide a stable 5V output like a computer or power bank or USB charger, etc. By using the USB cable, you can eliminate the need for an external power source, while debugging if your total circuit’s current requirement is less than that of the computer’s USB port can provide. Not only that, you can use it with any standard power bank which makes your project totally portable. A USB 2.0 port can provide current up to 500mA and it is more than enough for an Arduino UNO.
Arduino Uno and all many other big form factor Arduino boards are equipped with a standard 2.1mm DC power jack. Arduino Uno accepts 7-12V dec through this port and the onboard voltage regulator regulates it down to the required 5 and 3.3V. The centre pin is positive and the outer sleeve is grounded. You can use any 12V AC-DC adapter with proper out voltage and proper connector to power your Arduino board. It is more convenient when deploying your project where it’s not constantly monitored.