This article is about a simple 0-100 C digital thermometer with 1 C resolution using 8051. The circuit is based on LM35 analog temperature sensor, ADC0804 and AT89S51 microcontroller. LM35 is an analogue temperature sensor IC which can measure a temperature range of -55 to 150 C. Its output voltage varies 10mV per C change in temperature.

For example, if the temperature is 32 C, the output voltage will be 32 x 10mV = 320mV. ADC 0804 is used to convert the analogue output voltage of the LM35 to a proportional 8 bit digital value suitable ....etc

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GSM based Control System by pic microcontroller implements the emerging applications of the GSM Technology. Using GSM networks, a control system has been proposed that will act as an embedded system which can monitor and control appliances and other devices locally using built-in input and output peripherals.

Remotely the system allows the user to effectively monitor and control the house Appliances and equipment s via the mobile phone set by sending commands in the form of SMS messages and receiving the appliances status. The main concept b ....etc

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detail information on interfacing of lm35,adc 0808 and ic555 for temperature sensor on [email protected] ....etc

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introduction
Digital thermometer is a good choice for beginners who just left the world of microcontrollers, because it provides an opportunity to learn using sensors to measure real world signals are analog in nature is. This article describes the project as based on microcontroller and temperature sensor LM35 PIC16F688. Is analogous to the LM35 sensor that converts the temperature to a proportional analog voltage. The output signal from the sensor is connected to one of the inputs of the ADC in a PIC16F688 microcontroller to obtain an equival ....etc

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to get information about the topic automatic temperature controlled fan circuit full report,ppt and related topic refer the page link bellow
http://seminarsprojects.net/Thread-automatic-temperature-controlled-fan

http://seminarsprojects.net/Thread-automatic-temperature-control-of-vaccum-brazing-furnace-by-using-plc-full-report

http://seminarsprojects.net/Thread-temperature-controlled-fan-project

http://seminarsprojects.net/Thread-fan-speed-control-circuit ....etc

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To get full information or details of lm35 temperature sensor please have a look on the pages

http://seminarsprojects.net/Thread-automatic-temerature-controlled-fan-using-lm35-temperature-sensor

if you again feel trouble on lm35 temperature sensor please reply in that page and ask specific fields in lm35 temperature sensor ....etc

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By using a digital thermometer LM35 year tempIntroduction
Digital thermometer is a good choice for beginners who only stepped into the world of microcontrollers, because it provides the opportunity to learn using sensors to measure real-world analog signals that there is in nature. This article describes such a project based on a PIC16F688 microcontroller and temperature sensor LM35. LM35 sensor that converts analog year ambient temperature to a proportional analog voltage. The output signal from the sensor is connected to one of the inputs of ....etc

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can i have a copy of your code and a schematic diaram. thank you ....etc

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Abstract

The project is based on the working of temperature controller using LM35 and fan ascooler. The circuit automatically senses the temperature and works normally within a particulartemperature range. Above that range the sensor produces a signal and automatically turns on thecooling fan to control the testing temperature. 0-100 C electronic temperature controlled relay isa circuit using which the temperature can be controlled with the help of a LM35 temperaturesensor.The LM35 series are precision integrated-circuit temperature sensors ....etc

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ldr on pic16f877a with mikroc

void main()
{
TRISC = 0; //Configure PORTC as ouput

TRISA.RA0=1; // Configure as input pin for negative input of Comparator 1
TRISA.RA1=1; // Configure as input pin for negative input of Comparator 2
TRISA.RA2=1; // Configure as input pin for positive input of Comparator 1
TRISA.RA3=1; // Configure as input pin for positive input of Comparator 2
TRISA.RA4=0; // Configure as output pin for output of Comparator 1
TRISA.RA5=0; // Configure as output pin for output of Comparator 2

CMCON=0x05; // 'Tw ....etc

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