![]() ![]() Afterwards, connect the center pin to A0. Once again, connect the outer pins to 5V and GND. Arduino MEGA 2560 Analog Input Pin Potentiometer ConnectionĪn equivalent circuit to the above connects a potentiometer to an Arduino MEGA 2560 as shown below. Use any other colored wires for positive and GND voltages when red and black are not available. Both of these colors are used by convention and preferred when available. Use black wire for GND or 0V connections. Use red wire for positive voltage connections if available. Potentiometer Connected to an Arduino Uno A0 Analog Input Pin By comparison, the Analog Read Serial example uses a trim pot type potentiometer and a breadboard. For an alternate circuit, see the Analog Read Serial example on the Arduino website. Finally, the middle potentiometer pin, or wiper, connects to analog input pin A0 via a blue wire. Thereafter, the other outer potentiometer pin connects to an Arduino GND pin via a black wire. The Arduino Uno 5V pin connects to one potentiometer outer pin via a red wire. The following image shows a potentiometer connected to an Arduino Uno. Arduino Uno Analog Input Pin Potentiometer Connection Finally, connect the middle pin of the potentiometer to the A0 analog Arduino pin. ![]() Secondly, connect the opposite outside pin to GND of the Arduino. Firstly connect a wire from one of the outer pins of the potentiometer to 5V on the Arduino. Dupont Wires Connected to a PotentiometerĬonnect each male pin to the Arduino as shown next for an Uno and then MEGA 2560. The following image shows one wire connected per pin. Plug the socket ends of the three male-to-female Dupont wires onto each of the pins of the potentiometer. Connect the Dupont Wires to the Potentiometer and Arduino The first page of this Arduino tutorial for beginners lists the above wires and potentiometer. Arduino examples usually use a 10k potentiometer. The value of the potentiometer for this tutorial can be anywhere from around 5k to 20k. This means that it is a 5kΩ, or 5,000 ohm linear potentiometer. Face the shaft with the pins pointing down to see the marking. ![]() Dupont Male-to-Female Wires and a Potentiometer for Connecting to an Arduino Analog Inputī5K is the marking at the top of the above potentiometer. Specifically, this is a 5k potentiometer. The following image shows three 10cm male-to-female Dupont wires at the top. To clarify, these wires are male-to-female Dupont wire. Use Dupont wires with a pin on one end and a socket on the other to connect a potentiometer to an Arduino board. The other end of the Dupont wires connect directly to the Arduino pins or connectors, as explained next. Basically, the Dupont wires connect to the potentiometer pins. The easiest way to connect a potentiometer to an Arduino is to use Dupont wires. Connect a Potentiometer to an Arduino Analog Input On the other hand, digital input pins only read two logic levels of 0 or 1. Ten bit binary values represent the voltages read. Therefore, A0 to A15 are sixteen pins and not fifteen.Īrduino analog input pins read voltages between 0V to 5V by default, with a certain resolution. As explained above, pin numbering starts from 0. Hence A0 to A5 are six pins.Īrduino MEGA 2560 boards have sixteen analog input pins, labelled A0 to A15. Because pin numbering starts from 0, there are actually six pins. At first glance A0 to A5 looks like five pins. Arduino Analog Input PinsĪrduino Uno boards have six analog input pins, labelled A0 to A5. The potentiometer varies or changes the voltage on the Arduino analog input pin. Use a potentiometer in this part of the Arduino tutorial for beginners in order to read an analog input with Arduino. In addition, it provides basic information on potentiometers. This article shows different potentiometer symbols used in circuit diagrams. The potentiometer article on this website has more information on potentiometers for beginners. Turn the shaft or screw of the potentiometer to change its resistance. PotentiometerĪ potentiometer is a variable resistor. In addition it is important to know what an Arduino analog input is. What is a Potentiometer and Analog Input?īefore reading an analog input with Arduino, it is important to know what a potentiometer is. ![]()
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