Smart Dust – Example of an Important New Wireless Sensor System Brainchild of Prof. Kris Pister, EECS, UC Berkeley Small devices that can collect information from on-board sensors and transmit it over a wireless network that automatically sets itself up Possible sensors include temperature, relative humidity, illumination, acceleration, magnetic field, pressure, chemical vapors, camera, microphone, … These “motes” have memories, microprocessor, radio receiver and transmitter Commercially available

SmartDust – ultimate size Laser diode III-V process Passive CCRcomm. MEMS/polysilicon Active beam steering lasercomm. MEMS/optical qualitypolysilicon Sensor MEMS/bulk, surface,... Analog I/O, DSP, Control COTS CMOS Solar cell CMOS or III-V Thick film battery Sol/gel V 2 O 5 Power capacitor Multi-layer ceramic 1-2mm Background

Power Battery can last up to 7 days for radio mote, and 2 days for laser mote under full duty cycle (i. e., on all the time) Radio mote battery can last up to 2 years under 1% power duty cycle Solar cell can be used outdoors to support continuous power on

Sensors N S EW 2 Axis Magnetic Sensor 2 Axis Accelerometer Light Intensity Sensor Humidity Sensor Pressure Sensor Temperature Sensor Temperature Pressure Humidity Light Intensity Accelerometer Magnetometer …

RF MacroMote rev4 / weC Mote Sleep mode power drain 1  W (1 microwatt = watts); wake mode power drain 30 mW (milliwatts = watts) Radio communication frequency MHz (MHz = megahertz = 10 6 cycles per second) – like your portable telephone 150KHz clock Serial connection 9600 bps (bits per second) E N S W

Applications: FingerMote Smart Access, TreeMote, Burrowing Bird Monitor, Weather Station, Child Behavior Monitor, Smart Wherehouse Chartless Hospital Instant LAN ……

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