Temperature controlled Fan (AT89S52)

keilUvision for creating hexfile also to write program,and proteus7 professional for executing.

hello ur program is nice one,can u post the algorithm for it

hai, how to connect interrupt to at89s52 and what device i have to choose?

For What purpose That Transformer connected Circuit is used???

sir i need the full repot on this topic... so from where i should download

sir we are not getting ds18s20 in the market. any other alternative? can you reply soon.

You can use Ds1820

OK , Thank you Sir.

Sir we have completed the soldering according to the ciruit diagram that you have put up.
We have following doubts:
1) After switching on the supply you should instantly get a high at RST PIN NO.9 and then continuously low. Is that what should happen? We are getting low voltage only continuously.
(EVERYTIME YOU SWITCH ON THE SUPPLY THE MICROCONTROLLER SHOULD RESET, RIGHT?

2)How to check the ds1820? (it's output we checked on CRO, we are getting a sine wave.)

3)In 7 segment display, both the VCC have to be connected?

4) None of the display of 7 segment is switching on when supply from transformer side is given.

5)the include file is not included in the code and after that hex code is made so will it run?

6)how to check whether the program is burned? What pins should be high or low?

1. Yes its correct.
2. It wont give sine wave, its digital output so you should only get square wave.
3. yes
4. Did you program the chip correctly?
5. Use MIDE . Download it from 8051 Tools link on the top of this page.
6. The display should show the temperature.