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SHU – The Running Companion

SHU – The Running Companion. Dan Strauss Kyle Anderson Katie Klacik Brian Baumgartner. Project Overview. GPS, exercise, etc. Definitions. Criticality Low – inconvenient, fairly easy to fix Medium – device is completely unusable, or the component can’t be easily replaced

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SHU – The Running Companion

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  1. SHU – The Running Companion Dan Strauss Kyle Anderson Katie Klacik Brian Baumgartner

  2. Project Overview • GPS, exercise, etc.

  3. Definitions • Criticality • Low – inconvenient, fairly easy to fix • Medium – device is completely unusable, or the component can’t be easily replaced • High – the user’s safety could be at risk • Environment • Ground, mobile

  4. Components • Microcontroller • Boost converter • Inductor • Schottky Diode

  5. Microcontroller • 16 bits • 80 pins • 1.336 failures per 10^6 hours (low?) • MTTF – 7.49E5 hours

  6. Boost • Simple CMOS device • 8 pins • 0.172 failure per 10^6 hours • MTTF – 5.81E6 hours

  7. Inductor • Failure based on temperature • Ambient temperature – 40 degrees • Temperature rise – 55 degrees • 0.06 failures per 10^6 hours • MTTF – 1.6E7 hours

  8. Diode • Based on type and junction temperature • Otherwise, pretty generic • 5.4 failures per 10^6 hours • MTTF – 1.9E5 hours

  9. Battery • High risk device • Relies on resistors and capacitors • Relatively high reliability • Failure could result in user injury • Too late for safety features in hardware • Fuses might have been a good idea

  10. Questions, comments, and whatnot • Now!

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