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Analog IR Sensor Interfacing with ATmega16 and LED Display

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The principle of operation of an infrared sensor is based on infrared light that is reflected when hitting an obstacle. An IR receiver (Photo Diode) captures the reflected light and the voltage are measured based on the amount of light received. Infrared sensors are used in a wide range of applications proximity detection, robotic applications for distance and object detection, and color detection and tracking. The output of the IR sensor can be digital or analog. Here, we will use an IR sensor with analog output.

In this project, we will learn How to interface an Analog IR Sensor with AVR ATmega16 microcontroller. Since, the output of the analog IR sensor is analog in nature and these analog signals cannot be processed directly by the ATmega16 microcontroller. So, first this signal needs to be converted to digital value to be processed by the microcontroller. The conversion can be done with the help of ADC of the AVR ATmega16 microcontroller. After converting the analog signal to digital, the microcontroller will display the digital value in the 1×8 LED array. But the LED array can display only 8-bit at a time. So, the 1×8 LED array will first display the lower 8-bit and then the upper 2-bit of the 10-bit digital output with a delay of 500ms. Now, we will place our hand or any other obstacle infront of the Analog IR Sensor and we will see the changes in the output of Analog IR Sensor in the LED array.

Softwares Required

• AVR Studio 4 Software
• WinAVR 2010 Software
• SinaProg Hex Downloader Software
• USBasp Driver

Hardwares Required

Name	Quantity
AVR Trainer Board-100 with ATmega16	1pc
AVR USB Programmer	1pc
12V, 1A DC SMPS Adaptor	1pc
Analog IR Sensor	1pc
1 to 1 Connector-Female to Female	6pc
10 to 10 FRC Female to Female Connector	2pc

Video

Connection Guide

The step-by-step connection guide for Analog IR Sensor Interfacing with ATmega16 and LED Display is as follows