LCD BASED THERMOMETER USING AVR
OBJECTIVE : The main objective of this project is build a LCD based thermometer
COMPONENTS :
1.ATMEGA 8 (DIL285)
2.TEMPERATURE SENSOR LM35
3.LCD 20*4
4.CRISTAL 10MHz
5.CAPACITOR 22pf X 2
6.POTENTIOMETER 10K
7.POWER SUPPLY +5V
DESCRIPTION :
*The LM35 is a precision centigrade temperature sensor
*Which has an analog output voltage
* It has a range of -55ºC to +150ºC and a accuracy of ±0.5ºC
*The output voltage is 10mV/ºC
*The output voltage is converted by the AD convertor of the AVR
* The temperature is displayed on an LCD module
* the thermometer has a range of 0ºC to 40ºC
*If you want to have a readout in Fahrenheit you can use the LM34
HARDWARE DESCRIPTION :
*The ATMega8 uses a crystal as an oscillator for the clock pulses
* At PORT-D of the ATM8 an 20x4 LCD display is hooked to display the temperature in a discrete value and in a analog bar
SOFTWARE DESCRIPTION :
*The software for this project is written in BASCOM AVR
BLOCK DIAGRAM OF LCD THERMOMETER
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