Nick Anderson - LeaderNick Thate - CommunicatorBilly Zuleger - BSACAndrew Hanske – BWIGClient: Holly and Colton AlbrechtAdvisor: Dennis BahrDigital Braille WatchMarch 5, 2010 Problem Statement Background Information Preliminary Designs Design Matrix Final Design Future Work Develop a digital Braille watch that…◦ Uses standard Braille numerals◦ Displays military time◦ Is silent and easy to read◦ Is accurate and reliable Preferred written method for visually impaired Size standards◦ Each character consists of 3x2 grid◦ Dots > 0.092 in. apart◦ Characters > 0.245 in. apart ◦ Distances should be uniform Numerals only use bottom 4 positions◦ Four characters required for time displayhttp://www.dotlessbraille.org/AboutBraille.htm Audio watch◦ Disruptive Tactile analog watch◦ Difficult to read◦ Fragile Haptica Braille watch◦ Designed by David Chavez◦ Just concept, no mechanismhttp://www.independentliving.com/departments.asp?dept=134http://www.tuvie.com/haptica-braille-watch-concept/ Four vibrating dots Pros◦ Lacks moving parts◦ Feasible◦ Scalable Cons◦ Difficult to read◦ Power inefficient◦ Client does not approveDesign Option 1: Vibrating DotsMotorMotorMotorMotor Each dot attached to actuating mechanism Pros◦ Proven method◦ Easy to read Cons◦ Many moving parts◦ High power consumptionDesign Option 2: Actuating DotsLitschel, Dietmar, and Christoph Schwertner. Divice for Representing Relief Items. Caretec GmbH, assignee. US Patent 6109922. 2000. Eight rotating platesform display Pros◦ Less moving parts◦ Power efficient◦ Easy to read◦ Aesthetically pleasing Cons◦ Prototype larger thanwatch-sizeDesign Option 3: Rotating DisksScale: 1 – 10 (1 poor, 10 excellent)Weight Design Aspects Vibrating Dots Actuating Dots Rotating Disks0.05 Prototype Cost 8 6 70.15 Aesthetics 4 7 90.25 Ergonomics 3 8 90.05 Safety 10 9 90.10 Durability 9 6 80.15 Accuracy 7 10 100.15 Design Simplicity 9 4 70.10 Scalability 8 6 71 Total 6.35 7.10 8.45 Servos◦ Small and power efficient◦ Can provide desired rotation◦ Controlled by microcontroller Microprocessor◦ Arduino Duemilanove◦ Easily reprogrammable ◦ Thirteen output pinshttp://www.rctankcombat.com/archive/2007-03/jpg00016.jpghttp://www.mitchellpage.com.au/research/wp-content/uploads/2006/04/arduino_extreme_480.jpg Order materials Work on circuitry and hardware specifics Assemble prototype Testing and adaptation Finalize prototype Holly and Colton Albrecht Dennis Bahr Fall and Spring ’08 Braille Watch Design Teams “Arduino Duemilanove.” Arduino. n.d. 2 Mar. 2010. <http://arduino.cc/en/Main/ ArduinoBoardDuemilanove?action=diff>. "Braille Watch". UW-Madison Biomedical Engineering Design Courses – Project Pages. 2008. 11 Feb. 2010. <http://homepages.cae.wisc.edu/~bme300/braille_watch_f08/secure/>. "Haptica Braille Watch Concept". Tuvie Design of the Future. 2009. 25 Jan. 2010. <http://www.tuvie.com/haptica-braille-watch-concept/>. “Size and Spacing of Braille Characters.” Braille Authority of North America. n.d. 27 Jan. 2010.
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