I n this project we will monitor temperature and HEART BEAT monitor and will send sms to the saved number if temperature reaches above limited value.In this project we will sense body temperature using LM35 sensor. In brief firstly we convert the temperature into small voltage with the help of lm 35 sensor. LM 35 is temerature sensor convert the temperature in to small voltage at very accurately. Output of the temperature sensor is further converted into digital signal with the help of the ADC. IN this project we use ADC0809 . ADC 0809 is a 8 bit ADC and convert the any analogue signal into digital signal in 100 microsecond. To control the ADC we required a clock pulse, and 4 different signal . All this signal is provided by the controller. IN this project we use ic 89s51 as a main controller. IC 89s51 sense the output from the ADC in hex code. This HEX code is further converted into binary code with the help of program code inside the controller. IN the output device we use LCD display . LCD display display the contents of the display with the help of the ASCII code. ASCII CODE is a special code for displaying the character in the LCD. In the controller we convert the binary code in to ASCII codes with the help of the code conversion program. Temperature sensor by the lm 35 is now display in the ASCII code on the LCD display.a if the body temperature reaches above the critical temperature then it will automatically sens sms on desired mobile no.( saved in Mcrcontroller programming) using GSM modem
All the four zone are connected to the one variable resistor logic or connected to the fan regulator circuit.
Heart beat- First of all we will sense blood circulation using LDR circuit. After sensing the signal we will give it signal conditioning circuit. We will use high Gain ratio amplifiers.. amplifiers will give signal to comparator circuit. Which will give pulse to microcontroller. Microcontroller will sense pulse rate if pulse rate increases above the critical value then it will automatically send sms to the particular number.
We use main resistance of the fan regulator . In the normal fan regulator there is total 5 point for 5 different speed. We use the same resistance for control the speed of the fan or control the intensity of the light.
We will use GSM modem sm300 at 9600 baud rate.
This GSM modem is a highly flexible plug and play quad band GSM modem for direct and easy
integration to RS232. Supports features like Voice, Data/Fax, SMS,GPRS and integrated TCP/IP