1. D EVICE C HARACTERIZATION WITHIN V IRTUAL L AB USING L AB VIEW Supervisor : Prof. Joseph John Department of Electrical Engineering Vaibhav Singh (Y4466) Vikas Kumar Sharma (Y4482)

2. O BJECTIVES To perform the device characterization experiments using a computer interface. To carry out characterization experiments from any remote computer on the network.

3. D EVICE C HARACTERIZATION Studying the characteristics of a device Used in prediction of device behaviour in various circuit conditions Helpful in circuit designing

4. V IRTUAL L AB Conducting the experiment in Lab 1. Circuit 2. Power supply 3. Function Generator/ Potentiometer 4. Multimeter, CRO etc. Using computer interface 1. Circuit 2. Power supply 3. DAQ card 4. LabVIEW Remote access from another computer

5. A DVANTAGES OF V IRTUAL L AB Can play with circuit parameters Get real-time plots on the computer Experiments can be done from anywhere Educating large number of students Cost savings

6. D EVICES USED BJT o One of the most basic and extensively used semiconductor device JFET o Similar to MOSFET in characteristics.

7. E XPERIMENTAL S ETUP Computer Device circuit NI PCI DAQ card 6221 NI BNC 2120 connector LM 324, LM 741 as Voltage follower CD 4051 Analog Mux/Demux, HJR1-2C relay Power Supply

8. C IRCUIT D IAGRAMS BJT circuitJFET circuit

9. C OMBINED C IRCUIT D IAGRAM

11. E QUATIONS

12. F RONT P ANEL

13. B LOCK D IAGRAM

14. R ESULTS - BJT

15. R ESULTS – JFET

16. R EMOTE C OMMUNICATION Host Computer in Lab A computer in Remote location Device selection,Circuit Parameters (Resistance values) Results and Graphs

17. R EMOTE C OMMUNICATION DSTP (Data Socket Transfer Protocol) Web Publishing Tool

18. A DVANTAGES OF W EB P UBLISHING T OOL OVER DSTP DSTP requires IP address of the user who wants to communicate. DSTP use UDP while Web Publishing Tool uses TCP/IP. Web Publishing Tool does not require full installation of LabVIEW and it can be accessed through web browsers as it uses http.

19. F UTURE W ORK Other devices like MOSFET, medium power transistor can be used in project with small modifications. Other experiments can be implemented in the same manner.

20. T HANK YOU Q UESTIONS ???