Items you will need:
Arduino development board such as this one
What does it do?
This is a simple example of how to use the Hobby Components line hunting sensor module (HCARDU0005). It is a very simple module that requires only one DIOÂ pin (defined as an input) to operate. When the sensor detects a reflective object in close proximity it will pull a DIO pin that it has been connected to LOW. A non reflective or no object in close proximity will cause the DIO pin to go high.
3 VCC (+5V)
/* FILE: ARD_Line_Hunting_Sensor_HCARDU0005_Example
You may copy, alter and reuse this code in any way you like, but please leave
reference to HobbyComponents.com in your comments if you redistribute this code.
This software may not be used directly for the purpose of selling products that
directly compete with Hobby Components Ltd’s own range of products.
THIS SOFTWARE IS PROVIDED "AS IS". HOBBY COMPONENTS MAKES NO WARRANTIES, WHETHER
EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ACCURACY OR LACK OF NEGLIGENCE.
HOBBY COMPONENTS SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR ANY DAMAGES,
INCLUDING, BUT NOT LIMITED TO, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY
/* Define the DIO pin that will be used to communicate with the sensor */
#define LINEHUNTSENS_DIO 2
/* Initialise serial and DIO */
/* Setup the serial port for displaying the status of the sensor */
/* Configure the DIO pin the sensor will be connected to as an input */
/* Main program loop */
/* If the DIO pin is pulled low then an object has been detected */
Serial.println("Object detected !");