Smart Dust Relevant Links

• Smart Dust Home

  Processor Links

  • Sican 4 Bit Core: 300 uW/Mhz [PDF | HTML ]
  • FSMs: Registers and boolean logic. How to estimate power req. of registers?
    • Here's a homework and solutions relevant to building a simple FSM, in case you can't remember, like me.
  • StrongARM: See Intel StrongARM home. The sa-110 linecard suggests performance numbers of at least 110mW, which is probably WAY out of our range. And this is as low power as they get.
  • Xemics makes low power 8 bit RISC processors (300uW @ 1MIPS). PDF info sheet.
  • TI has a nice page about their low power 16 bit microprocessor (which includes a 1uW standby mode).
  • Analog Devices ADXL-202 accelerometers used in virtual keyboard glove.  Product page. PDF data sheet.
  • Atmel AVR 8-bit RISC processor family, also used in virtual keyboard glove and most macro motes.  Product page.
    
• Acceleration Sensing Glove paper. PDF. Processing requirements: coordinate system transforms, low-pass filter on accelerometer data, vector normalization.
• Ramki and Ashwin's communication protocol 252 report in PS. They've got some interesting bibilographic links here.
• Some capacity numbers for very small batteries.
• Xemics makes some low power radio-on-a-chip products. Unfortunately, they're still 100mW and relatively large.

Some Interesting Numbers

• Micro mirror actuation requirements: 57mA @ 4 V (228 mW). Kind of a lot. From here.
• These aren't the same as corner cube reflectors (CCRs), I guess. Pister claims in this PDF that CCR's can actuate with a power consumption of 1uW.
• The smallest batteries I could find are 5.8mm in diameter and 2.15 mm high -- they offer 33mAh at 1.4 volts.
• A 45x26x7.5 solar cell produces 100mA @ .45V. That's .011 mA (11 uA)/mm^3. See here.
• Sony makes some small lasers which might be useful if mounted on a mote. Unfortunately, they still have power requirements in the 100mW range.

Big Questions

• How do dust motes network together? The CCR based approach is the only one which is demonstrably low enough power, but it requires centralized communcation of the sort we're not (theoretically) considering.

Some links to stuff we've done

• Project Proposal Page
• Scenario 1 Description - simple sensors
• Scenario 2 Description - collecting data from a network of sensors
• Scenario 3 Description - human-machine interfaces
• Scenario 4 Description - Sensor networks capable of simple inferance and notification
• Milk Sensor Writeup
• Acceleration Sensing Glove Writeup