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Characterization Report Animation On Bicycle Wheels

Characterization Report Animation On Bicycle Wheels. Spring Sem. 2009 (Single Semester). By : Jonathan Yizchaki David Michaeli Instructor : Ina Rivkin. Project Goals. Implement a digital circuit for showing images/animations using LEDs over bicycle wheels.

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Characterization Report Animation On Bicycle Wheels

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  1. CharacterizationReportAnimation On Bicycle Wheels Spring Sem. 2009 (Single Semester) By: Jonathan Yizchaki David Michaeli Instructor: Ina Rivkin

  2. Project Goals • Implement a digital circuit for showing • images/animations using LEDs over bicycle • wheels. • Usage of uControllerchip as the heart of the system. • Design of hybrid Digital/Analog system. • Design of a designated computer program for interfacing with the circuit. • MINIMAL production cost.

  3. Perception of Vision • The system we build should take advantage of humane perception of vision. • Average rotation rate of bicycle wheel (MTB) is 2.5 RPS (20 kph). • Aligning LEDs over bike wheel diameter causes refresh rate of 5 FPS. • 5 FPS – enough for fluent perception of stable image with high brightness LEDs.

  4. General Structure • A row of high brightness LED lamps aligned over wheel spokes (one diameter length). • A uController generating lighting signals according to pre-programmed image in an external memory unit. • Synchronization using magnetic sensor (Computation of angular velocity and image orientation stabilization). • Designated software for conversion of rectangular images into polar ones and hardware interface (through JTAG). • Multiplexing mechanism for controlling each LED, using matrix alignment method.

  5. 3 1 2 Hardware • Circuit – uController, memory unit, battery, connectors. • Two rows of LEDs aligned over a diameter. • Magnetic sensor – generating electric pulse on every pass by a magnet held on the bike fork.

  6. Hardware (cont.) • uController – the heart of the system. • Memory unit – EEPROM – variety of capacities available. • Battery Slots. • JTAG – animation programming and firmware updates. 3 1 2 4

  7. Time Table

  8. Time Table (cont.) • Week 10 • Final hardware layout. • Firmware and Image programming software design. • Week 11 • Debugging. • Week 12 • Integration. • Mechanical design. • Week 13 • Integration. • Mechanical design. • Week 14 • Final Report. • Final Presentation.

  9. Thank You!

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