1. 1 Bradley University ECE Department EE452 – Sr. Capstone Project Computer Network Controlled Etch-A-Sketch ® Final Presentation 4/28/05 Dream Team members: Robert Lodesky Arnold Bynum Advisors:Dr. Irwin Mr. Sánchez

2. 2 Table of Contents  Project Summary  Software  Hardware

3. 3 Summary Robert

4. 4 Summary Tina Fred

5. 5 Table of Contents  Project Summary  Software  Hardware

6. 6 Software The letter “a” The letter “a” Header File Header File Input Software Input Software Output Software Output Software Reset Program Reset Program Alphabetical Conversion Alphabetical Conversion

7. 7 What it takes to draw an “” What it takes to draw an “a” a

8. 8 Header File Input conversion output Main reset

9. 9 Pen Reader

10. 10 Serial Port Software (PC) PC Microcontroller CreateFileGetCommState Buffer 984nbdl58 SetupCommWriteFile

11. 11 Serial Port Software (Microcontroller) MicroPac 535 PC CRINITSERINB Reset CRB MR1B Parity Size Reciever controls CSRB CRB

12. 12 r o b e r t Ready Button

13. 13 r o b e r t r* SW3407NW433N3…etc o* NW3012SW4332…etc b* W4213NW3211…etc Solves Conversion Problems

14. 14 Table of Contents  Project Summary  Software  Hardware

15. 15 EAS System Etch-A-Sketch H-Bridge Circuitry Protection Circuitry Motors

16. 16 Hardware  Motor Control H-Bridges H-Bridges LMD 18200 3 amp, 55 volt H-BridgeLMD 18200 3 amp, 55 volt H-Bridge Control speed and direction of motors through microcontroller Control speed and direction of motors through microcontroller C B allows for faster switching if frequency is increased C B allows for faster switching if frequency is increased C C bypasses rail of DC source C C bypasses rail of DC source Agilent E3634A DC Power Supply (EQ-2539)Agilent E3634A DC Power Supply (EQ-2539)

17. 17 LMD18200 Block Diagram

18. 18 Hardware  Motor Control H-Bridges H-Bridges LMD 18200 3 amp, 55 volt H-BridgeLMD 18200 3 amp, 55 volt H-Bridge Control speed and direction of motors through microcontroller Control speed and direction of motors through microcontroller C B allows for faster switching if there is an increase in frequency C B allows for faster switching if there is an increase in frequency C C bypasses rail of DC source C C bypasses rail of DC source Agilent E3634A DC Power Supply (EQ-2539)Agilent E3634A DC Power Supply (EQ-2539)

19. 19 LMD18200 Block Diagram

20. 20 Hardware  Motor Control H-Bridges H-Bridges LMD 18200 3 amp, 55 volt H-BridgeLMD 18200 3 amp, 55 volt H-Bridge Control speed and direction of motors through microcontroller Control speed and direction of motors through microcontroller C B allows for faster switching if there is an increase in frequency C B allows for faster switching if there is an increase in frequency C C bypasses rail of DC source C C bypasses rail of DC source Agilent E3634A DC Power Supply (EQ-2539)Agilent E3634A DC Power Supply (EQ-2539)

21. 21 LMD18200 Block Diagram

22. 22 Hardware  Motor Control H-Bridges H-Bridges LMD 18200 3 amp, 55 volt H-BridgeLMD 18200 3 amp, 55 volt H-Bridge Control speed and direction of motors through microcontroller Control speed and direction of motors through microcontroller C B allows for faster switching if there is an increase in frequency C B allows for faster switching if there is an increase in frequency C C bypasses rail of DC source C C bypasses rail of DC source Agilent E3634A DC Power Supply (EQ-2539)Agilent E3634A DC Power Supply (EQ-2539)

23. 23 LMD18200 Block Diagram

24. 24 Hardware  Motor Control Port Four of MicrocontrollerPort Four of Microcontroller Motor Speed Motor Speed Timer 2 generates PWM signal across P4.0, P4.1Timer 2 generates PWM signal across P4.0, P4.1 Motor Direction Motor Direction P4.6, P4.7 alternate between +5 and 0 voltsP4.6, P4.7 alternate between +5 and 0 volts Protection Circuitry Protection Circuitry Optical IsolatorsOptical Isolators

25. 25 PWM Test Signals

26. 26

27. 27 Drawing an “O”  Look up tables used to draw letters Four look up tables total Four look up tables total Vertical DirectionVertical Direction Horizontal DirectionHorizontal Direction Vertical SpeedVertical Speed Horizontal SpeedHorizontal Speed

28. 28 Letter “O”

29. 29 The End Real Technical Questions? Go To: http://cegt201.bradley.edu/projects/proj2005/lescreen/ Recap: C++ and Assembly software working Hardware functioning properly Drew the letter “O”