Arduino Nano - Heating Element

This tutorial instructs you how to control a heating element with Arduino Nano. Subsequently, you will be able to apply this knowledge to create a heating system in a separate tutorial.

Hardware Preparation

1	×	Arduino Nano
1	×	USB A to Mini-B USB cable
1	×	Relay
1	×	Heating Element
1	×	12V Power Adapter
1	×	DC Power Jack
1	×	Jumper Wires
1	×	Breadboard
1	×	(Recommended) Screw Terminal Expansion Board for Arduino Nano
1	×	(Recommended) Breakout Expansion Board for Arduino Nano

Or you can buy the following sensor kits:

1	×	DIYables Sensor Kit (30 sensors/displays)
1	×	DIYables Sensor Kit (18 sensors/displays)

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Additionally, some of these links are for products from our own brand, DIYables.

Overview of Heating Element

The Heating Element Pinout

The heating element typically has two pins:

The Positive (+) pin (red) should be connected to the 12V of a DC power supply
The Negative (-) pin (black) should be connected to the GND of a DC power supply

How to Control Heating Element using Arduino Nano

If a 12V heating element is supplied with 12V power, it will generate heat. In order to regulate the heating element, a relay must be placed between the Arduino Nano and the heating element. The Arduino Nano can then control the heating element through the relay.

If you are unfamiliar with relays (pinout, how they work, how to program them, etc.), please refer to the Arduino Nano - Relay tutorial for more information.

Wiring Diagram

This image is created using Fritzing. Click to enlarge image

Arduino Nano Code

The code below will cause the heating element to be switched ON every five seconds and OFF again after five seconds have passed.

/* * This Arduino Nano code was developed by newbiely.com * * This Arduino Nano code is made available for public use without any restriction * * For comprehensive instructions and wiring diagrams, please visit: * https://newbiely.com/tutorials/arduino-nano/arduino-nano-heating-element */ #define RELAY_PIN 2 // The Arduino Nano pin connected to the IN pin of relay module // The setup function runs once on reset or power-up void setup() { // initialize digital pin D2 as an output. pinMode(RELAY_PIN, OUTPUT); } // The loop function repeats indefinitely void loop() { digitalWrite(RELAY_PIN, HIGH); // turn on heating element 5 seconds delay(5000); digitalWrite(RELAY_PIN, LOW); // turn off heating element 5 seconds delay(5000); }

Detailed Instructions

Connect your Arduino Nano to the computer using a USB cable.
Launch the Arduino IDE, select the appropriate board and port.
Paste the code into the Arduino IDE.
Click the Upload button in the Arduino IDE to send the code to the Arduino Nano.
Check the temperature of the heating element.

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Code Explanation

Check out the line-by-line explanation contained in the comments of the source code!

Video Tutorial

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