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Our objective is to develop a multi-channel brain stimulator. This device must generate stimulation current of 1 mA on 16 separate channels, filter out external electrical noise, and allow each channel to be independently gated on and off as well as adjust the current amplitude on each channel. Such devices are available but exist as a hardware/software packages and are expensive. These packages include many elements that are not necessary for our client’s research.
The circuit is being tested. We have met with a member of the group that worked on this project during a previous semester. Additional research has been conducted.
| Week | Reporting Period Beginning | Activities |
|---|---|---|
| 1 | September 8 | Met with client. |
| 2 | September 15 | Tested previous group’s circuit, met with member from previous group, discussed project with advisor. |
| 3 | September 22 | Read journal article on which project is based, contacted Prof. Jack Ma, met with members of the medical electronics lab. |
| 4 | September 29 | Researched circuit parts able to withstand 1000V, learned about Michigan electrodes. group meeting. |
| 5 | October 6 | Ordered parts and samples, talked to client. |
| 6 | October 13 | Received samples, began PDS, began testing parts. |
| 7 | October 20 | Met with Burke O’Neal and Paul Victorey, tested circuit components, received remaining parts, completed PDS, practiced presentation, researched optical isolators. |
| 8 | October 27 | Completed presentation, met with client, soldered circuit, parts research, purchased optical isolators. |
| 9 | November 3 | Tested transistors, removed inductor, set up switch circuit, tested rectifier circuit. |
| 10 | November 10 | Made changes to power supply, added switch, bought new optical isolator, found potentiometers, |
| 11 | November 17 | Bought more optical isolators, continued testing switch circuit at 20V, rebuilt switch circuit on breadboard |
| 12 | December 1 | Tested transistors, tested switch circuit, soldered switch circuit, began poster, ordered voltage regulator and floating power supply. |
| 13 | December 8 | Tested circuit at 20V, designed capacitive bypass circuit, met with advisor, decreased pulse width, practiced presentation, tested at 120V |
| 14 | December 15 | |
| 15 | December 22 |
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Midsemester Presentation (Oct 27 2006, 622 kb) |
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PDS (Nov 2 2006, 20 kb) |
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Final Poster (Dec 13 2006, 459 kb) |
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Final Paper (Dec 13 2006, 667 kb) |
