1. Group 14 SmartGLove hardware design
Dong-Han Ryu
Yukeun Sim
Shiv Biddanda
Po-Cheng (Robert) Wang

2. Packaging Design & PCB Layout
- Force sensors will be attached under the fingertips
- Accelerometer will be attached on the fingers
- Finger motion is detected using accelerometers
- Finger touch is detected using pressure sensors

3. Battery Charger - MAX1555 - Polymer Li-Ion Battery, 3.7V
- Charge battery from USB bus power

4. Bluetooth
- WML-C40
- Internally step down to 3.3V
- UART interface

5. Buttons&Crystal Resonator

6. Force Sensor - Rs = Sensor Resistance (At no load = 5M)
- Vout = -Vs*(Rf/Rs) Rf = 300K
- Rs = Sensor Resistance (At no load = 5M)
- As force increases on the sensor, Rs decreases
- Maximum Vout = 5V

7. Accelerometer - Both digital and analog output
<ADXL213 Block Diagram>
- 1.2g dual axis accelerometer
- Both digital and analog output
- However, input resistance is very high to use analog output

8. Accelerometer filter - This reduces input resistance
- Voltage buffer
- This reduces input resistance
- Voltage gain is one
- AD8532
- Rail-to-rail input/ouput
- Slew rate : 5V/us

9. PIC18F4550
Battery
Bluetooth
Sensors

10. Questions?