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Kinetic Energy Harvesting

Kinetic Energy Harvesting. Weekly Advisor Meeting November 13, 2013. Electrical Progress. Basic LED visual indicator circuit designed Red (>1.65V) Yellow (>2.25V, >2.35V) Green (>2.45V, >2.55V) Cap overvoltage protection parts chosen 1.8V and 3.3V boost power supply designed

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Kinetic Energy Harvesting

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  1. Kinetic Energy Harvesting Weekly Advisor Meeting November 13, 2013

  2. Electrical Progress • Basic LED visual indicator circuit designed • Red (>1.65V) • Yellow (>2.25V, >2.35V) • Green (>2.45V, >2.55V) • Cap overvoltage protection parts chosen • 1.8V and 3.3V boost power supply designed • Both operational when cap voltage > 1.2V • All parts ordered, arriving Thurs • Will be built this weekend • Possible 5V supply for next semester November 13, 2013

  3. Mechanical Progress • Steel hand crank fixture made • Gear analysis • Stress factors • Material strength • Intermediate ratios • Fewer gears, better efficiency • Gears are expensive • Current best option: Amazon (~$180) • 3D printing ($5/in^3) • Gears, shafts, pillow block mounted bearings to be ordered ASAP November 13, 2013

  4. Integration • Wooden frame built for mounting gears onto • Approx 36”x20”x18” • Not concerned with turnstile shape yet • Cross supports will be added once gears have been chosen November 13, 2013

  5. Efficiency Testing • Test system needed to determine efficiency • Energy in: • Energy out: W= (CV^2)/2 • Efficiency is the ratio between them Pulley Turnstile arms Hanging mass November 13, 2013

  6. To Do • Figure out what we need to test system • Assemble circuits (Est. 3+ hours) • Select gears • Purchase gears • Mount gears/shafts onto frame • Measure efficiency • Assignments... November 13, 2013

  7. Assignment Schedule • Individual build summary paper (11/14) • Two weeks exactly until final report (11/27) • Thanksgiving break – no weekend meeting • Final presentations begin (12/3) • Final poster (12/4) • Poster competition (12/5) • Establish website presence • Next Semester – switch to ECE requirements • No more weekly papers November 13, 2013

  8. Concerns • Time to ship, build, and test before final report • Funds quickly decreasing • Prof. Sup: choosing optimal motor speed • Prof. Sup: design not complex enough • No time to recover if parts don’t fit together November 13, 2013

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