A Tape-less Measuring Tape

Made by adamt03 / Displays / Environmental Sensing / Productivity / Sensors / Weather

About the project

an arduino hooked up to an ultrasonic sensor reading to an LCD display.

Project info

Difficulty: Easy

Platforms: Arduino

Estimated time: 1 hour

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

	Arduino Uno - R3	x 1
	I2C 1602 Arduino LCD Screen	x 1
	Ultrasonic Sensor Hc-sr04	x 1
	jumper wires - generic	x 1
	Half-size Breadboard	x 1
	9V Battery Holder makes it modular	x 1
	elastic bands holding it together but if you wanted to have this as more than just a proof of concept then you could come up with a more robust method.	x 1

Software apps and online services

arduino create (web editor)

Hand tools and fabrication machines

	small phillips screwdriver to adjust the LCD contrast.	x 1
	a to b cable for uploading the code	x 1
	an actual measuring tape to test and ensure its working properly.	x 1

Story

i was given an arduino to mess around with, i remembered someone giving me some random electronics they found which contained the ultrasonic sensor(i only realized what it was after seeing other arduino sensors and realizing the similarities.) so i put it all together and made my project.

Code

A tape-less measuring tape - code

i did use other code like an example LCD test sketch and a serial output code for the sensor before putting them together myself.

#include<UltraDistSensor.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);

UltraDistSensor mysensor;
float reading;

void setup() {
    lcd.init();                      // initialize the lcd 
    lcd.backlight();
    Serial.begin(9600);
    mysensor.attach(12,13);//Trigger pin , Echo pin
}

void loop() {
    reading=mysensor.distanceInCm();
     lcd.setCursor(0,0);
     lcd.print("Distance : ");
      lcd.print(reading);
      lcd.print("cm");

    delay(250);
}