Digital Thermostat with fan and 3

device control via IR remote.

Project By

Engr Zeeshan Raja

Peshawar Pakistan

Cecos University Of

Engineering And IT



This circuit is based on the Atmel AT89C51 microcontroller. The LM35 temperature sensor provides analogue output. The ADC0804

converts it into 8-bit digital data. I used relays instead of leds connected to port 0.The relays

should be driven by ULN2003 Ic. Use Philips TV remote for this circuit.

Below zip file contains the images of completed project, hex file, circuit diagram and pcb file.

Click here for pcb, Circuit diagram and hex file


For help Please Email me: