Controller Circuit

Gauging of temperature hardly often is required in so many activity, for example to monitor peripheral, room, and other. With gauging of temperature in real time hence can be taken decision related to condition of area of happened so that is formed condition of area wanted. Gauging peripheral of temperature can be made by being based on microcontroller and temperature censor. Microcontroller can be program to take data from temperature censor and presents it at display peripheral.

In making this peripheral, required some components in the scheme. Component required is:

1. System Circuit a Minimum Of Microcontroller

Mikrokontroler is a IC which can be program to do things determined in program. One of mikrokontroler which popular is Atmel 89S51. This microcontroller will be used as brain from temperature gauging system. In this project, minimum system circuit used a system product a minimum of mikrokontroler AT89S51 ready for use with 8 Kbyte non-volatile memory ( EEPROM) menyimpan program to and data, 4 port input/output (I/O) with capacities 8 beet every its(the port, LCD port with built-in routine ( for character LCD with driver HD44780 or which kompatibel), and serial port RS-232.

2. Temperature Censor

Temperature censor used is LM35DZ. LM35DZ has gauging reach of temperature between 0 - 100 degree Celciuses with increase of 10 mV for every degree Celcius. For example at temperature 0 degree of celcius hence its(the strain is 0 mV while at temperature 30 degree of celcius hence its(the strain is 300 mV or 03 V.