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|     Written By: Tom Bonar     |     Date Posted: 04-30-2014    |
The Arduino micro-controller is one of the most popular development boards for electronics enthusiasts. With the ability to control components such as buzzers, LED’s, servos, motors, and LCD’s, Arduinos have become the go-to selection for users that are looking to start into electronics, firmware coding, or automation. So with all these item types at your finger tips, what good is it to have control over so many components, if there are no sensors to trigger different functions in the Arduinos firmware?

The MaxBotix Inc., MaxSonar sensor line has become a very popular sensor for operation with the Arduino micro-controller. With three simple interfaces, it is easy to connect a MaxSonar to an Arduino.

In this article, I will be providing: links to components needed, wiring diagrams for all outputs, and Arduino sketch files for all compatible MaxSonar sensors. With that being said, let’s get coding!
 

Table of Contents

 

List of Materials Needed

Setting Up the Arduino

Wiring Pictures

 

Arduino Coding Part 1

    Useful Information
    Arduino Comments
    Code the Input & Variables
 

Arduino Coding Part 2

    Code Setup
    Code Section to Read Sensor
 

Arduino Coding Part 3

    Code Debug Section
    Code Void Loop
    Review the Code
 

Code Downloads

    LV-MaxSonar Code Downloads
    XL-MaxSonar Code Downloads
    HR-MaxSonar Code Downloads

Setting up the Arduino

This section assumes the Arduino Ultimate Starter Kit mentioned in the List of Materials is being used. This kit includes breakaway headers, LED's, a breadboard, a buzzer, jumper wires, an Arduinio Uno, and several other components.

1.) Install the Arduino software to your computer
2.) Solder a 7 pin header to the MaxSonar, I used a 90 degree header found here,
     so the sensor faces away from the Arduino.
     For instructions on soldering, SparkFun has a great tutorial seen here.
3.) Place the sensor on the breadboard, make sure to leave room for wiring and other components.
     3a.) Place a red jumper between the sensor V+ and the + strip on the breadboard.
     3b.) Place a blank jumper between the sensor GND and the (-) strip on the breadboard.
4.) Wire the Arduino to the breadboard
     4a.) 5V to the + strip on the breadboard (allows power to multiple devices at one time)
     4b.) GND to the (-)strip on the breadboard (grounding for multiple devices at once)
     4c.) Wire Arduino signal input to the breadboard row with the sensor output signal.
5.) Connect the Arduino to the computer. Please allow time for the computer to install the Arduino Drivers.

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Wiring Images

Wiring an Arduino for Analog Voltage Wiring an Arduino for Pulse Width

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