o Once we get the DCDC converters, set up
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1: Tentative Project Schedule o Once we get the DC/DC converters, set up a test voltage supply circuit to test isolation. • Modify the VIC design in Dr. Kaczmeric’s paper to fit our needs, determine part numbers of circuit components needed (Yusko, Ebben). • Have a working channel by April 7 (All). • Check out a locker cart from the tool shop in the basement of ECB (Grasse). Difficulties Experienced Everything went smoothly this week; we encountered no significant difficulties. Hours (Running Totals) Team Meetings 24.0 hr Dani 36.5 hr Tony 35.0 hr Erik 35.0 hr Marty 36.5 hr Multichannel Brain Tissue Stimulator Design Team Client: Professor Matt Jones Team Members Marty Grasse (Team Leader) Dani Ebben (BSAC) Tony Wampole (BWIG) Erik Yusko (Communications) March 8 – March 23 (Includes Spring Break) Problem Statement In order to stimulate neurons in a more realistic manner, a controller device is needed to independently control current on 16 electrodes in a multiple-electrode array. The device must use parallel logic from a computer to control the current. The device must be isolated from electrical noise so the measurements are accurate. Last Week’s Goals • Test Texas Instruments VICs, modify our existing gating design based on test results (Grasse, Yusko, Ebben). • Enjoy spring break (All). Summary of Accomplishments • Met to try to test gating solution, had limited success. Over break reworked the gating design, now have a good solution (Yusko, Ebben). • Met on March 22 to firm up plan for how to get a working channel (All). o Goal: Working channel by April 7. From there it will be relatively easy to reproduce the channel and enclose in a rack-mount chassis. • Modified previous signal gating design, now have a good solution. Determined that if this gating solution is used, we need a VIC with a transconductance of 0.2 mA/V (Yusko, Ebben). • Determined that a linear potentiometer will allow us to not worry about keeping output linear. This is accomplished through two internal potentiometers rather than just one (Ebben). • Found a potentially viable DC/DC converter priced at $9 per unit (Wampole). o We will discuss with Burke O’Neal at our meeting whether or not this will work for our purposes. • Updated Website (Wampole). This Week’s Goals • Meet with Burke O’Neal to discuss • DC/DC converter selection. Also check out multimeter, power supply, soldering equipment, and breadboards (Grasse, Wampole). o After meeting, order DC/DC converters.