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Finger Mouse

Finger Mouse. Group 20: KyungSik Choi Jae-Hee Hong Brayn Yang. INTRODUCTION. Objective Create a new concept of mouse that is more effective for laptops instead of a touch pad Product Feature Wireless and Compact Device Multi-touch features

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Finger Mouse

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  1. Finger Mouse Group 20: KyungSik Choi Jae-Hee Hong Brayn Yang

  2. INTRODUCTION • Objective • Create a new concept of mouse that is more effective for laptops instead of a touch pad • Product Feature • Wireless and Compact Device • Multi-touch features • General functions of a mouse - moving and clicking

  3. INTRODUCTION (Cont.) • User Benefits • Use the mouse on a wider range of surfaces • High mobility • Move around, and use the mouse in more comfortable ranges anywhere fingers can reach

  4. SYSTEM OVERVIEW • Software: • TI’s MSP430 and cypress • Hardware: • DC/DC Converter • Force and Optical Sensors • MCU • Transmitter and Transceiver

  5. FINGER MOUSE

  6. OVERALL SCHEMATICS

  7. DC/DC CONVERTER • L6920DTR • Transforms and stabilizes voltage to 3V

  8. DC/DC Converter (Schematic)

  9. Force Sensor • Comparator • Clicking voltage: 1.5V • Moving voltage: 2.1V • Threshold voltage : • 1.8V [Input voltage(3V) * 3R/(2R+3R)]

  10. Force Sensor (Schematic)

  11. Force Sensor (Results) • Normally : Output High • Click the force sensor: Output Low

  12. Optical Sensors • Advantages of ADNS-3530 • Capable of detecting high speed motion up to 20 inches per second • Based on optical navigation technology • Compact: 12.90mm x 9.60 mm x 1.69 mm

  13. ADNS-3530 vs. VT-5350

  14. OPTICAL SENSOR SECHEMATIC

  15. OPTICAL SENSOR - PCB

  16. MCU - MSP430F1222 • Ultra-low-power microcontroller • 16-bit CPU, 16-bit registers with great code efficiency • 28 pins with 22 general-purpose I/O pins • Widely used MCU for optical mouse

  17. MSP430F1222 SCHEMATIC

  18. I/O’s of MSP430 • MOSI • Controls the two optical sensors • MISO • Displacement data (X, Y) • MOTION (use of XOR) • Active high during motion detection • SHUT DOWN • NCS • Active low during read operation • CLK • RF data for transmitter

  19. SOFTWARE-MSP430 • MSP430F1222 • wm430_system.c • wm430_transmitter.c • wm430_buttons.c • wm430_led.c

  20. MOSI

  21. RF DATA

  22. TRANSMITTER & TRANSCEIVER • Nordic nRF2402 and nRF2401A • Low-power, low-cost • Optimum range of power supply

  23. TRANSMITTER SCHEMATIC

  24. TRANSCEIVER SCHEMATIC

  25. CY7C63231A USB MCU • To decode to present the mouse information to the mouse driver on the host PC • Outputs corresponding to the USB port

  26. RECEIVER

  27. Challenges • Solderingtoo many small parts • Hard to get it work as a whole unit • Unfamiliarity to Human Interface Device • Budget

  28. Success • Completing individual parts except for the USB dongle • Individual contribution

  29. Recommendations • Finance the budget • PCB and Soldering

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