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Tone Matrix Music Box

Kian Hui Wong Chia Siong Goh Wan Qi Choo Jun Jun Peh. Tone Matrix Music Box. Presenter: Kian Hui Wong. Project Overview. An 8x8 grid-based music synthesizer made with a button pad at the top and some LEDs at the bottom

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Tone Matrix Music Box

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  1. Kian Hui Wong Chia SiongGoh Wan Qi Choo Jun Jun Peh Tone Matrix Music Box Presenter: Kian Hui Wong

  2. Project Overview • An 8x8 grid-based music synthesizer made with a button pad at the top and some LEDs at the bottom • Produces sound and emits light (LED) when user touches the buttons • 3 music playing modes: • Sweep mode • Gravity mode • Memory mode • Several different types of sound: • Guitar, Piano, and Drum beats

  3. Components Chosen for Analysis • Microcontroller (PIC18F64K22) • Switching Regulators(LM2675-5,LM2675-3.3) • LED driver(AS1116)

  4. Microcontroller (PIC18F64K22) • High complexity (64 pin, 8 bit) • Controls LCD, buttons input, audio, LED drivers, accelerometer. • λp=(C1πT+C2πE)πQπL =(0.14*0.98+.032*4)10*1 =2.652 Failures/106Hours • MTTF =106/λp =377074 hours≈43 years

  5. Microcontroller (PIC18F64K22)

  6. Switching Regulator(LM2675) • Possible high temperature • 15V unregulated input • 3.3V, 1Amax regulated output • λp=(C1πT+C2πE)πQπL =(0.02*2.8+0.0034*4)10*1 =0.696 Failures/106Hours • MTTF =106/λp =1436782 hours≈164 years

  7. Switching Regulator(LM2675)

  8. LED driver (AS1116) • Possible high temperature • 3.3V, 335mAtypical when all LEDs are lighted • λp=(C1πT+C2πE)πQπL =(0.4*0.6+.011*4)10*1 =2.84 Failures/106Hours • MTTF =106/λp =352113 hours≈40 years

  9. LED Driver (AS1116)

  10. Definition of Criticality Level • High- Possibility of injury to user • Medium-Device not working, not repairable • Low- Majority of device still working and can be repaired easily

  11. FMCEA chart

  12. FMCEA chart

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