1. ECE482 Final Project Spring 03

2. Specification Design a digital thermometer to report the temperature in the room in degrees Fahrenheit. The PC should update the room temperature once each second. A display as simple as the following is acceptable: Present room temperature is 78 degrees Fahrenheit. While you can have this message scrolling downward, it would be better if the message was updated in place. Work in teams of 3 (your choosing). You will demonstrate your project and give a brief oral presentation either before or after the final exam on Mon May 5 (6:30 – 8:10 pm). I would prefer that the presentations take place prior to the exam if possible.

3. Design of a Digital Thermometer

4. LM34 Thermometer IC

5. PC Extender Card

6. Buffering I/O Address Range 300H-31FH

7. Side View of Extender Card

8. Interface Trainer Decoding Circuitry

9. Connector and Cable

10. I/O Port Addresses Decoded by Trainer

11. PC Interface Trainer Module

12. PC Interface Trainer Connection

13. Simple Program to Test Port A

14. 8255 PPI Chip Pinout

15. 8255 Control Word

16. Example 4-5

17. Example 4-6

18. Writing a Character to the Screen

19. Writing a Character String to the Screen

20. Binary to Decimal to ASCII Conversion