Arduino Ultrasonic Range Finder With Lcd Display

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Arduino ultrasonic range finder, with lcd display! by Jan_Henrik on April 3, 2014

Table of Contents Arduino ultrasonic range finder, with lcd display! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Intro: Arduino ultrasonic range finder, with lcd display! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 1: What do you need & Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 2: The Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 3: The Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 4: Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 5: Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Step 6: Finishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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http://www.instructables.com/id/Arduino-ultrasonic-range-finder-with-lcd-display/

Intro: Arduino ultrasonic range finder, with lcd display! Hello, in this project i want to show and explain you a range sensor with ultrasonic and a 20x04 lcd screen. I wrote the code for this project myself and added lots of comments, so that everybody can understand it and use it for other projects (maybe a light range sensor?!). It is easy to build and much more easier to program, it just requires a few cheap parts and can run on battery, for a portable rangefinder. The maximum rated range is 500 cm, the range is measured 20 times per seccond. it is Displayed on a lcd screen which is 20x4 chars big, it has a custom start message, and it can have a custom design while measuring. It will have a backlight LED and can run on every arduino, which has I²C communication. That mean you can run it on an Arduino nano, which is very small. It also requires 5V so it has to be a 5V version of an Arduino.

Image Notes 1. Arduino 2. Ultrasonic sensor 3. Display 20x04 chars 4. Random parts, not necessary but recommend ;P

Step 1: What do you need & Tools We dont need much things, the parts should be less then 15$ (without arduino, with arduino may 25-35$): Parts: Arduino (5-55$) , http://tinyurl.com/pk2wdt3 Ultrasonic sensor (2$), HC-SR04 , http://tinyurl.com/d3ss7tl A 20x4 Display (6$) , http://tinyurl.com/pbk35ry A IIC/I2C/TWI/SP I Serial Interface Board Module (2$) , http://tinyurl.com/nl2tr2k Some wires a Breadboard A USB cable Software: Arduino , www.Arduino.cc wire.h library (should be with the Arduino software) LiquidCrystal_I2C.h library for the Display NewPing.h library for the sensor Tools: what are tools? D: (no tools needed, yay) Additional: a Case...

Image Notes 1. Cables


2. Ultrasonic sensor, module HC-SR04 3. Breadboard 4. Display 20x4 5. Display 20x4 Image Notes 1. IIC/I2C/TWI/SP I Serial Interface Board Module connected to the Display 2. The Display 3. Serial/Part Number 4. Jumper for the backlight LED 5. New output pins: GND VCC SDA SCL

Step 2: The Display Now we need to connect the IIC I2C TWI SPI Serial Interface Board Module to the display, that allows us to easily use the Display with the I²C bus of the Arduino ( nearly every Arduino/Atmel processor can communicate with I²C, it just need a SDA and a SCL pin). Solder the module to the display ( picture 2 ). Take care of the heat, it can easily destroy the display and the module!!!

Image Notes 1. Cables 2. Ultrasonic sensor, module HC-SR04 3. Breadboard 4. Display 20x4 5. Display 20x4 Image Notes 1. IIC/I2C/TWI/SP I Serial Interface Board Module connected to the Display 2. The Display 3. Serial/Part Number 4. Jumper for the backlight LED 5. New output pins: GND VCC SDA SCL


Step 3: The Sensor The ultrasonic sensor is a very good one, its part number is HC-SR04, it is one with a range of 1cm-500cm. It is a good build one, which is easy to handle and to use.

Image Notes 1. Ultrasonic emitter 2. Ultrasonic reciever

Step 4: Assembly Lets assembly it, plug the VCC pins of the Display and the Sensor to the +5V pin of the Arduino, plug the GND pins of the Display and the Sensor to GND of the Arduino. Now plug the TRIG pin of the Ultrasonic Sensor to pin 12 of your Arduino and the ECHO pin to pin 11 of your Arduino. Sensor: VCC -> +5V GND -> 0V TRIG -> pin 12 ECHO -> pin 11

Plug the SDA pin of the display to pin A4 of your Arduino and the SCL pin of the display to A5 of your Arduino Display: VCC -> +5V GND -> 0V SDA -> A4 SCL -> A5



Step 5: Code Now my favorite chapter, because i wrote the code myself, what made my day, beacuse im not such a good programmer :) The code is made for the Arduino Uno, you can find it here: https://github.com/Jan--Henrik/Arduino-ultrasonic-rangefinder I wrote many commands, to help you understanding it. You can add a custom startup message (line 57), also you can add a custom design while measuring ( line 87 ) Feel free to comment bugs, addictions and things to make it better!!! :) Also feel free to comment if you amde the code for other processors (like the Attiny85)!!


Step 6: Finishing SUCCESS!!! :) Now your first self build arduino range sensor should work!! congratulations!! Ideas: Code it for other processors/platforms make a nice case use other parts troubleshooting: Display shows bars: unplug power source, then wait 5 secconds and plug it in again. Sometimes there is a bug, that the display dont refresh :/ may SDA and SCL are reversed Sensor dont work: TRIG and ECHO are switched Display, Arduino and LED´s fade out: you made a short circuit, unplug your power source immediately!!!! Thank you for Reading, feel free to comment and Vote for me in a Contest!!! greets Jan Henrik

Image Notes 1. Cables 2. Ultrasonic sensor, module HC-SR04 3. Breadboard 4. Display 20x4 5. Display 20x4


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Arduino Ultrasonic Range Finder With Lcd Display

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