1. Introduction 12 VDC to 120 VAC Inverter Juan Tello This presentation will probably involve audience discussion, which will create action items. Use PowerPoint to keep track of these action items during your presentation In Slide Show, click on the right mouse button Select “Meeting Minder” Select the “Action Items” tab Type in action items as they come up Click OK to dismiss this box This will automatically create an Action Item slide at the end of your presentation with your points entered.

2. Summary Background How the circuit works? Simulation Testing Applications Conclusion

3. The Circuit

4. Schematic using Simplorer

5. Simulation Output

6. Half Circuit R4 & C2

7. Just One Cycle

8. Half Circuit D1 & R1

9. One Cycle

10. Half Circuit VCE2 & TV1

11. One Cycle

12. Half Circuit One Cycle

13. Half Circuit Analysis During Positive Cycle D1 is closed Q2 is open C1 is discharging T2-V1 is negative voltage

14. The Other Half Circuit

16. Simulation Summary During Positive Cycle Bottom Top D1 is closed D2 is open Q2 is open Q1 is closed C1 is neg. C2 is zero T2 is neg. T1 is Neg. Const.

17. Simulation Summary During Negative Cycle Top Bottom D1 is closed D2 is open Q2 is open Q1 is closed C1 is neg. C2 is zero T2 is neg. T1 is Neg. Const.

18. Real Circuit—Top View

19. Real Circuit—Bottom View

20. Transformer from a Microwave

21. Transformer and Circuit

22. Testing the circuit

23. Oscilloscope

24. Oscilloscope closed up

25. Measuring with a Voltmeter

26. Problems and Solutions Capacitors of 68uF were replaced with 2-33uF and 1-2.2uF Steel wire was used in the primary winding on transformer instead of copper wire Frequency = 1.3kHz No solution Vp-p = 40V No solution

27. Application Automobile -TV’s -DVD’s -VCR’s -Other household appliances

28. Conclusion Advantages -Low cost -Easy to built Disadvantages -Reliability -Efficiency

29. Conclusion (continuation) Who makes this product Future work - Further investigation to solve present problems: frequency, output voltage, load variation