1. ESE Lab Computer based Temperature Control Sid Deliwala, ESE Labs

2. http://www.waltonemc.com/Newsletter_Archive/2002_02February.htm

3. Computer based temperature control Advantages Adjustable software controlled temperature range Logging of all acquired data Graphical interface Several sensors can be connected to the controller

4. Requirements Temperature sensor with a voltage output A device to convert sensor output voltage to digital format (daq board) Software (LabVIEW) A hardware interface to turn the heater on/off

5. Project Description Power supply Circuit to turn on/off heater and measure temperature Data acquisition board installed in the PC LabVIEW software

6. Power Supply

7. Protoboard Connections

8. Test the 47ohm resistor

9. Circuit building, temperature sensor LM34 1 microfarad capacitor

10. Circuit building, heater control LM741 op amp pinout 5 volt relay pinout DC fan

11. Final Circuit

12. Computer Interface Data Acquisition Connection On PC

13. DAQ board and analog to digital conversion LabVIEW files have extension.VI (virtual instruments)

15. LabVIEW control diagram

16. What you will get.. Protoboard, jumper wires Parts packet PC based Temperature Control.VI file on the desktop of the PC