1. 2-Axis Electroencephalogram Controller Dr. Boris Hyle Park Group F Joseph Steven Fletcher Ryan Alan LaCroix Gary Matthew Stroup Kenneth Gerard Sugerman

2. Presentation Overview  Purpose –Compatible with pre-existing devices  Proposed Solution –NeuroSky –Electrode Placement –Conditioning Circuit  Results –Prototype –Device Use

3. Purpose  Produce a two dimensional Electroencephalogram (EEG) controller for widespread application –Mechanical arm –Hands free light for Dentist –Wheel Chair Adapted from www.toysrus.com Adapted from www.fotosearch.com/bthumb http://blogs.static.mentalfloss.com

4. Purpose  Electroencephalogram (EEG) –Measure net brain activity through voltage measurements by surface electrode –No physical movement necessary

5. Purpose  Interface Device –EEG Measurements  Brain Activity –Device of choice http://www.ipmc.cnrs.frwww2.latech.edu ?

6. Project Overview http://www.ipmc.cnrs.frwww2.latech.edu Measure Brain Activity (EEG) Translate into signal usable by a device (wheelchair, robotic arm, etc)

7. Proposed Solution  Reverse engineer two existing inexpensive products –Force Trainer –MindFlex www.unclemilton.com http://mindflexgames.com

8. Proposed Solution  2 Independent Axes –3 Levels of control Off Med High Off Med High Adapted From http://blogs.static.mentalfloss.com/blogs/archives/22329.html?cnn=yes

9. Project Overview http://www.ipmc.cnrs.frwww2.latech.edu Measure Brain Activity (EEG) Translate into signal usable by a device (wheelchair, robotic arm, etc)

10. Electrode Placement Plan ~1in ~4 in ~5 in ~2.5 in  Frontal Lobe –Devices already located  Premotor Cortex –Motor Control (Ohno et al)  Occipital Lobe –Visual stimuli? (Quick, D)

11. MindFlex

12. Force Trainer

13. Electrode Placement  Force Trainer –Occipital Lobe  Mindflex –Frontal Lobe ~1in ~4 in ~5 in

14. Project Overview http://www.ipmc.cnrs.frwww2.latech.edu Measure Brain Activity (EEG) Translate into signal usable by a device (wheelchair, robotic arm, etc) What inputs can a device read

15. Device Interaction  Three Levels of Control Per Axis

16. Microcontroller  What is a Microcontroller –Small computer  Memory  Processing Core  Programmable inputs –true, false

17. Purpose  One Channel  Three Levels  Two Channels  Two Level

18. Project Overview http://www.ipmc.cnrs.frwww2.latech.edu Measure Brain Activity (EEG) Translate into signal usable by a device (wheelchair, robotic arm, etc) What do the Brain Activity Measurements give us

19. Proposed Solution  Existing Products –Force Trainer –MindFlex  Commonalities –NeuroSky Chip www.neurosky.com

20. NeuroSky  NeuroSky chip output –DC Motor Control  Pulse width Modulation Fan HighFan MediumFan Off

21. Neurosky  Increase Brain Activity  Increase Pulse Width Fan High http://www.ipmc.cnrs.fr

22. Project Overview http://www.ipmc.cnrs.fr www2.latech.edu Measure Brain Activity (EEG) Translate into signal usable by a device (wheelchair, robotic arm, etc)

23. Conditioning Circuit  Two Characteristics –Pulse width to Analog Voltage Magnitude –Analog to Digital (2 bit)  Prototype: Brain Operated Remote Interface System (BORIS) –BORIS-1 –BORIS-2

24. Conditioning Circuit  Pulse Width to Analog Voltage Magnitude (BORIS-1&2)

25. Conditioning Circuit  Analog to Digital High Cutoff 3.25V Low Cutoff 2.2V

26. Conditioning Circuit  Analog to Digital –BORIS-1  LabView Script with ELVIS-1

27. Conditioning Circuit  Analog to Digital –BORIS-2  Voltage Comparator  Supplied Source/Drain

28. Prototype  BORIS-1 –Tethered –External Power Source –Requires a Desktop PC http://mindflexgames.com www.unclemilton.com

29. Prototype  BORIS-2 –Wireless –Battery Powered

30. High Cutoff 2V Low Cutoff 1.5V High Cutoff 3.25V Low Cutoff 2.2V Results (BORIS-2) Force TrainerMindFlex

31. How to use the Device  Output –Pin1/2  Axis 1 –Pin3/4  Axis 2 Microcontroller

32. How to use the Device  Output –Pin5  GND –Pin6  +9 Volts –Pin7  -9 Volts –Pin8  Digital off –Pin9  Digital on Microcontroller Supply Voltage Drain Voltage

33. Future Work  BORIS-3 –Floating cutoff values –Use the NeuroSky chip only  As opposed to integrated into a MindFlex/Force Trainer circuit board –Have circuit printed on a circuit board  Improved efficiency (size, power)

34. Conclusion  Successful in the Proof of Concept –Developed a 2-axis EEG Controller  Live Demonstration

35. Acknowlegements  Dr. Boris Hyle Park –Assistant Professor, Bioengineering  Hong Xu –Development Engineer  Ron Poutre –FunFly Hobby  Dr. Jerome Schultz –Department Chair, Bioengineering

36. Abolfathi, Peter Puya. Toyota makes a wheelchair steered by brainwaves. 2 July 2009. http://www.gizmag.com/toyota-wheelchair-powered-brain-waves/12121/. 8 April 2010. Blain, Loz. Honda’s Brain-Machine Interface: controlling robots by thought alone. 2 April 2009 http://www.gizmag.com/honda-asimo-brain-machine-interface-mind-control/11379/. 8 April 2010. Galan, F. et al. “Continuous Brain-Actuated Control of an Intelligent Wheelchair by Human EEG”. ftp://ftp.idiap.ch/pub/papers/2008/galan-grazBCI2008-2008.pdf. Human EEG”. ftp://ftp.idiap.ch/pub/papers/2008/galan-grazBCI2008-2008.pdf. Murph, Darren. Thought-control research brings mental channel changing ever closer. 24 Feb. 2010. http://www.engadget.com/2010/02/24/thought-control-research-brings-mental -channel-changing-ever-clo/?icid=engadget-iphone-url. 8 April 2010. Ohno, K. et al. Analysis of EEG signals in Memory Guided Saccade Tasks. Nagoya Institute of technology. http://www.springerlink.com/content/q647qh703mpl4352/fulltext.pdf. 8 April 2010. Provost, Sheldon, J. Lucas McKay. “A real-time EEG Based Remote Control of a Radio -Shack Car”. http://www.lems.brown.edu/~scp/eegremotecontrolcar.pdf. -Shack Car”. http://www.lems.brown.edu/~scp/eegremotecontrolcar.pdf. Quick, Darren. What’s on your mind-microelectrodes offer poke free brain control. 3 July 2009. http://www.gizmag.com/brain-microelectrodes/12141/. 8 April 2010. Quick, Darren. Brain to Brain communication over the internet. 6 October 2009. http://www.gizmag.com/brain-to-brain-communication/13055/. 8 April 2010. The Local. “Scientists develop helmet to control toy cars via brain waves”. Science & Technology. 19 Jun 2008. http://www.thelocal.de/sci-tech/20080619-12577.html. Technology. 19 Jun 2008. http://www.thelocal.de/sci-tech/20080619-12577.html. Dr. Boris Hyle Park Assistant Professor, Bioengineering A211 Bourns Hall, Riverside, CA 92521 Hong Xu, Development Engineer in Bioengineering at UCR A217 Bourns Hall, Riverside, CA 92521 Phone: 951-827-7235 Ron Poutre Ron Poutre Funfly Hobby 6950 Indiana Avenue Suite #1, Riverside, CA 92506 References

37. Questions? http://www.istockphoto.com

38. Floating Cutoff Values