1. Shiv Yukeun Donghan Robert

2.  Project overview  Project-specific success criteria  Block diagram  Component selection rationale  Packaging design  Schematic and theory of operation  PCB layout  Software design/development status  Project completion timeline  Questions / discussion

3.  HID for touch-based control  Move mouse cursor, other applications  Wearable glove  Three fingers – touch sensors/accelerometers  Bluetooth communication  UART interface  Battery powered  Rechargeable through USB connector

4.  Communicate “mouse commands” wirelessly via a Bluetooth interface.  Move cursor using motion of a single finger.  Encode and decode gestures  Distinguish among cursor movement, mouse clicks, and gestures via finger-tip sensors.  Charge battery and manage battery power

5.  Microcontroller MicrocontrollerPIC18F4550ATMega640 ManufacturerMicrochipAtmel Operating Frequency4kHz - 48MHz1MHz - 16MHz SRAM Memory2048 bytes4096 bytes Flash Memory32k bytes64k bytes Number of I/O pins35 pins32 pins Operating Voltage2.5V - 5V2.5V, 2.7V, 3V, 3.3V ADC1316

6.  Bluetooth Module BluetoothWML-C40RN-24E ManufacturerMitsumiRoving Networks Frequency2402 - 2480MHz Power supply3.2V - 3.4V3.3V Current consumption90mA50mA max Transmission rate2178kbps max721kbps Receive sensitivity-82dBm-80dBm Output level20dBm (class 1)4dBm (class 2) Dimensions 13.2(w) x 18.8(L) x 2.05(H) mm 20.32(w) x 50.8(L) x 4.08(H) mm

7.  Battery/Battery Charger IC  MAX1555  Manufacturer: MAXIM  Designed to charge Lithium polymer batteries  Input range:  USB: 3.7V to 6V 100mA charge  AC adapter: 3.7V to 7V 350mA charge  Can charge with either USB and/or AC adapter  Cheap and small

8.  Accelerometer AccelerometerADXL213LIS3L01AL ManufacturerAnalog DevicesSTMicroelectronics # of axes23 Voltage3.3V - 6.0V2.4V - 3.6V Output MethodsPWM / AnalogAnalog Sensitivity1.2g2g

9.  Touch Sensor  FlexiForce  Manufacturer: Tekscan  Sensitivity: 1 lb/25lb/100lb  Slim and easy to interface  Acts as a variable resistor

10.  OKW Ergonomic Enclosure  150mm x 100mm x 40mm Main PCBBreakout-boards/Sensors

11. Force Sensor X-Y Accelerometer 222 Bluetooth Module Battery Charger Battery USB Main PCB X-Y Accelerometer X-Y Accelerometer Computer Bluetooth Receiver Bluetooth Receiver 2 Breakout Board 1 Breakout Board 2 Breakout Board 3

12.  Microcontroller Bluetooth Battery Charger Touch Sensors Accelerometer Sensors ICD 2 LED Crystal Oscillator

13.  Breakout Board (Accelerometers) Three breakout boards for accelerometers Main purpose of this is to reduce noise Cx and Cy determine the bandwidth 0.1uF will be used Bandwidth = 50 Hz Noise = 17.91mV which is 0.35% of maximum output voltage

14.  Accelerometers Input impedance should be lower than 2.5Kohm Voltage Follower circuit To reduce input impedance 5V Rail-to-rail Single supply

15.  Touch Sensor To ATD Without load, Rs is 1Mohm An inverting operational amplifier Different voltage levels – different resistance values R F = 300Kohm Vout = -5 * ( 300Kohm / Rs )

16.  Touch Sensor Generate -5V DC voltage inverter Vout = -5 * ( 300Kohm / Rs ) To generate positive voltage output

17.  Battery Charger USB POWER USB Detection Charge Status DC POWER Battery Battery LED Schottky diode

18.  Switch

19. Analog MICRO Bluetooth Charging USB Power

23.  Microcontroller  Bluetooth  Accelerometer  Touch Sensor  Windows Driver

24.  Week 9 – Finish PCB layout, Accelerometer code  Week 10 to 11 – Bluetooth, Force Sensor code, Windows Driver  Week 12 – Windows Driver, Soldering  Week 13 – Packaging, integration  Week 14 – Testing / Documentation  Week 15 to 16 – Testing / Wrap up / Documentation

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