This can be very useful if your code doesn’t repeat, but you want to test it multiple times. Pushing it will temporarily connect the reset pin to ground and restart any code that is loaded on the Arduino. Just like the original Nintendo, the Arduino has a reset button (10). It is sometimes used to set an external reference voltage (between 0 and 5 Volts) as the upper limit for the analog input pins. Most of the time you can leave this pin alone. AREF (9): Stands for Analog Reference.We have a tutorial on PWM, but for now, think of these pins as being able to simulate analog output (like fading an LED in and out). These pins act as normal digital pins, but can also be used for something called Pulse-Width Modulation (PWM). PWM (8): You may have noticed the tilde (~) next to some of the digital pins (3, 5, 6, 9, 10, and 11 on the UNO).These pins can be used for both digital input (like telling if a button is pushed) and digital output (like powering an LED). Digital (7): Across from the analog pins are the digital pins (0 through 13 on the UNO).These pins can read the signal from an analog sensor (like a temperature sensor) and convert it into a digital value that we can read. Analog (6): The area of pins under the ‘Analog In’ label (A0 through A5 on the UNO) are Analog In pins.Most of the simple components used with the Arduino run happily off of 5 or 3.3 volts. 5V (4) & 3.3V (5): As you might guess, the 5V pin supplies 5 volts of power, and the 3.3V pin supplies 3.3 volts of power.There are several GND pins on the Arduino, any of which can be used to ground your circuit. The Arduino has several different kinds of pins, each of which is labeled on the board and used for different functions. They usually have black plastic ‘headers’ that allow you to just plug a wire right into the board. The pins on your Arduino are the places where you connect wires to construct a circuit (probably in conjuction with a breadboard and some wire. Pins (5V, 3.3V, GND, Analog, Digital, PWM, AREF) The recommended voltage for most Arduino models is between 6 and 12 Volts. NOTE: Do NOT use a power supply greater than 20 Volts as you will overpower (and thereby destroy) your Arduino. More on how to program with Arduino can be found in our Installing and Programming Arduino tutorial. The USB connection is also how you will load code onto your Arduino board. In the picture above the USB connection is labeled (1) and the barrel jack is labeled (2).

The Arduino UNO can be powered from a USB cable coming from your computer or a wall power supply ( like this) that is terminated in a barrel jack. Voltage, Current, Resistance, and Ohm's LawĮvery Arduino board needs a way to be connected to a power source.We recommend that you have at least a decent understanding of these concepts before you dive in to the wonderful world of Arduino. However, you will have a much better time learning along side your Arduino if you understand some basic fundamental electronics beforehand. Some useful widgets to use with your ArduinoĪrduino is a great tool for people of all skill levels.

The different varieties of Arduino boards.

What is on the typical Arduino board and why.

What projects can be accomplished using an Arduino.

In this tutorial, we’ll go over the following: The code might not make perfect sense right now, but, after reading this tutorial and the many more Arduino tutorials waiting for you on our site, we'll get you up to speed in no time! You Will Learn Believe it or not, those 10 lines of code are all you need to blink the on-board LED on your Arduino.

Name of arduino programming language