LM35 Temperature Sensor Interfacing with AVR ATmega32 Microcontroller and LCD Display

LM35 Temperature Sensor Interfacing with ATmega32 and LCD Display

33997

In this project, we will learn How to interface a LM35 temperature sensor with AVR ATmega32 Microcontroller and LCD display. Here, we will measure the temperature of the surrounding or any other material to which the LM35 temperature sensor is connected for its temperature measurement and we will display the temperature value in degree centigrade in a 16X2 alphanumeric LCD.

Since the output of LM35 temperature sensor is analog in nature and microcontroller cannot process the analog signal directly. So, first it will convert the analog output of LM35 temperature sensor to digital values using its analog to digital converter and then it process the digital value to convert the digital value in degree centigrade value. Then, the microcontroller will display the temperature in degree centigrade in the 16X2 alphanumeric LCD.

Now, lit a match stick or lighter near the LM35 temperature sensor and see the changes in its output value in the 16X2 alphanumeric LCD.

Softwares Required

Hardwares Required

Name	Quantity
AVR Trainer Board-100 with ATmega32	1pc
AVR USB Programmer	1pc
12V, 1A DC SMPS Adaptor	1pc
LM35 Temperature Sensor	1pc
RG1602A 16X2 Alphanumeric LCD Green	1pc
1 to 1 Connector-Female to Female	6pc
10 to 10 FRC Female to Female Connector	2pc

Circuit Diagram

Video

Connection Guide

The step-by-step connection guide for LM35 Temperature Sensor Interfacing with ATmega32 and LCD Display is as follows

Steps - 1 ( 0f 10 )

Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.
Steps - 2 ( 0f 10 )

Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.
Steps - 3 ( 0f 10 )

Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.
Steps - 4 ( 0f 10 )

Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.
Steps - 5 ( 0f 10 )

Connect the Vs, Vout and GND pins of LM35 temperature sensor with VCC, PA0 and GND pins of PortA header of AVR Trainer Board-100 with a 1 to 1 Connector.
Steps - 6 ( 0f 10 )

Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.
Steps - 7 ( 0f 10 )

Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.
Steps - 8 ( 0f 10 )

Switch on the power with the help of Power Switch of AVR Trainer Board-100.
Steps - 9 ( 0f 10 )

Download LM35 Temperature Sensor Interfacing with ATmega32 and LCD Display Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.
Steps - 10 ( 0f 10 )

Lit a match stick or lighter near the sensor and see the output.

Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.

Steps - 1 ( 0f 10 )
Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.

Steps - 2 ( 0f 10 )
Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.

Steps - 3 ( 0f 10 )
Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.

Steps - 4 ( 0f 10 )
Connect the Vs, Vout and GND pins of LM35 temperature sensor with VCC, PA0 and GND pins of PortA header of AVR Trainer Board-100 with a 1 to 1 Connector.

Steps - 5 ( 0f 10 )
Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.

Steps - 6 ( 0f 10 )
Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.

Steps - 7 ( 0f 10 )
Switch on the power with the help of Power Switch of AVR Trainer Board-100.

Steps - 8 ( 0f 10 )
Download LM35 Temperature Sensor Interfacing with ATmega32 and LCD Display Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.

Steps - 9 ( 0f 10 )
Lit a match stick or lighter near the sensor and see the output.

Steps - 10 ( 0f 10 )