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After considering which sensors would be most appropriate for the types of hand gestures i i want to use i have decided on Flex Sensors and Accelerometers.  These have been purchased from proto-pic.com at a total cost of £61.20 for

2 Triple Axis Acceletometer Breakout – MMA8452Q

Features

• 1.95 V to 3.6 V supply voltage

• 1.6 V to 3.6 V interface voltage

• ±2g/±4g/±8g dynamically selectable full-scale

• Output Data Rates (ODR) from 1.56 Hz to 800 Hz

• 99μg/Hz noise

• 12-bit and 8-bit digital output

• I2C digital output interface (operates to 2.25 MHz with 4.7 kΩ pullup)

• Two programmable interrupt pins for six interrupt sources

• Three embedded channels of motion detection

– Freefall or Motion Detection: 1 channel

– Pulse Detection: 1 channel

– Jolt Detection: 1 channel

• Orientation (Portrait/Landscape) detection with set hysteresis

• Automatic ODR change for Auto-WAKE and return to SLEEP

• High Pass Filter Data available real-time

• Self-Test

• RoHS compliant

• Current Consumption: 6 μA – 165 μA

6 Flex Sensor 2.2″

Features

– Angle Displacement Measurement

– Bends and Flexes physically with motion device

– Possible Uses

– Robotics

– Gaming (Virtual Motion)

– Medical Devices

– Computer Peripherals

– Musical Instruments

– Physical Therapy

– Simple Construction

– Low Profile

– Flat Resistance: 25K Ohms

-Resistance Tolerance: ±30%

-Bend Resistance Range: 45K to 125K Ohms (depending on bend radius)

-Power Rating : 0.50 Watts continuous. 1 Watt Peak

-Temperature Range: -35°C to +80°C

Data Sheets

accel_MMA8452Q

flex22

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