#Sparkfun arduino uno pinout how to
#Sparkfun arduino uno pinout code

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 вЂAnalog InвЂ™ 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 вЂheadersвЂ™ 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.

#Sparkfun arduino uno pinout how to

More on how to program with Arduino can be found in our Installing and Programming Arduino tutorial.

#Sparkfun arduino uno pinout code

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. Every Arduino board needs a way to be connected to a power source.