EDN
As part of the quest to give computing devices smaller, more efficient designs, University of Michigan researchers have spent over a decade working to develop what they believe is the world’s smallest complete computer, built on a cubic millimeter scale. The Computer History Museum in Mountain View, CA, which currently houses an exhibit focused on the Micro Mote, estimates that close to 150 of the computers could fit inside a single thimble.
University of Michigan faculty members David Blaauw, Dennis Sylvester, David Wentzloff, and Prabal Dutta, as well as several graduate students, have developed tiny computing units (on a millimeter scale) that are capable of harvesting solar power to utilize wireless communication, pressure and temperature sensors, and even still image and video processing.
“To be ‘complete,’ a computer system must have an input of data, the ability to process that data – meaning process and store it, make decisions about what to do next – and, ultimately, the ability to output the data,” says David Blaauw, a professor of electrical engineering and computer science at the University of Michigan. “The sensors are the input and the radios are the output. The other key to being a complete computer is the ability to supply its own power.”
The main impediment to creating such small devices is not shrinking the functioning parts but creating a power source. Professor Prabal Dutta, also a professor at the University of Michigan, told Sharp Europe blog Humans Invent, “If you look at a laptop or mobile phone, the battery dominates the volume of the device so we’ve had to spend a lot of effort on figuring out how to reduce the power needed for all the parts. You can’t plug these things in or recharge them because they are so small.”
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Solar cells in the Michigan Micro Mote power the battery with ambient light – including indoors where no natural sunlight is present – in theory allowing the computers to run forever.
Each unit, part of a category of technology referred to as smart dust, is assembled in layers and is capable of being customized to a particular function. Because space was not available for a keyboard, mouse, or display, the research team had to develop a different way to communicate with the M3. The operator is able to send information to the computer by strobing light at a high frequency. Once the Micro Mote processes the data, it uses conventional radio frequencies to send the information to a central computer.
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I can imagine all kinds of applications for these....
