FEATURES

Power Transistor (BD135)

-BD135 is used for controlling the DC brushless fan with sufficient current.

Temperature Sensor (LM35)

-In this project, two LM35s are used for two difference temperature. Vs of the LM 35 are given 5v and    the Vout pins are connected to AN0 and AN1 (PIC16F873A) separately.

PIC16F873A (Microcontroller)

This powerful (200 nanosecond instruction execution) yet easy-to-program (only 35 single word instructions).CMOS FLASH-based 8-bit microcontroller packs Microchip’s powerful PIC® architecture into an 28-pin package and is upwards compatible with thePIC16C5X, PIC12CXXX and PIC16C7X devices. The PICF873A features:

·         256 bytes of EEPROM data memory

·         Self programming

·         An ICD

·         2 Comparators

·         5 channels of 10-bit Analog-to-Digital (A/D)converter

·         2 capture/compare/PWM functions

·         The synchronous  serial port can be configured as either 3-wire Serial Peripheral Interface(SPI™) or the 2-wire Inter- Integrated Circuit (I²C™) bus

·         A Universal Asynchronous Receiver Transmitter (UART)

All of these features make it ideal for more advanced level A/D applications in automotive, industrial, appliances and consumer applications.