Hey, watch where you're flicking. That's a computer

Hey, watch where you’re flicking. That’s a computer
M3 with temperature sensor. Credit: Martin Vloet, University of Michigan

Michigan Micro Mote (M3) is the world's smallest computer. How small? It's about the size of a grain of rice. A University of Michigan's March report can tell you that the team behind the computer have come up with a fully autonomous system that can act as a smart sensing system. "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," said David Blaauw, one of the faculty members who achieved the Michigan Micro Mote.

Kaustubh Katdare in Crazy Engineers said on Wednesday, "It requires no special imagination to understand that as more things get connected with each other, the size of computers operating behind the scenes must be smaller." He said "the Michigan Mote opens up new avenues towards the world of Internet of Things (IoT)."

Sensors are the input; radios are the output. Solar cells power the battery with ambient light, said the university report detailing the work and features of this computer. Therein lies a key word in this story, "battery," or what the engineering world refers to as the size/power matchup. "As you shrink down in size," said Blaauw, the percentage of the system tends to be dominated by the battery. It's actually not hard to make chips small, but it is hard to make them low power. We could have very small chips, but we'd still end up with really large batteries."

They use a 1mm2 solar cell producing 20nW. The device can harvest enough energy under to run perpetually. Standby power consumption is 2nA, "a million times less power than the average mobile phone consumes while on standby."

Operating at low power during the "sleep" time is one of the many keys to the success of this technology, said the report.

The computer is built in stacked layers. They communicate through a universal interface protocol, MBus. Just by exchanging one layer with another, a new sensing system is achieved. The computers can collect and transmit data as far as 2 meters; they can monitor a room for motion or anomalies in pressure and temperature, and communicate that data to a base station. Blaauw said the work ahead is getting the sensors to talk to one another and extend range to about 20m. David Wentzloff, another faculty member behind the computer, is leading the effort to increase its ability to communicate over longer distances, said the report.

Hey, watch where you’re flicking. That’s a computer
Cross-Section of the Michigan Micro Mote Imager.

Of what practical use is this computer? A helpful way to get answers is to ask, who would need mini-computer sensing devices? The Michigan group is sending the computer to interested researchers. Home automation and industrial, medical and environmental monitoring are some of the potential application areas that would come to mind and, in the bigger picture, advance the Internet of Things.

Those behind the achievement, said the report, are Michigan David Blaauw, Dennis Sylvester, David Wentzloff, Prabal Dutta and several key graduate students over the years. Some have already founded companies to exploit aspects of the technology.

Explore further

How can we really get to a trillion sensors to power the Internet of Things?

More information: www.eecs.umich.edu/eecs/about/ … igan-Micro-Mote.html

blaauw.eecs.umich.edu/project. … 61f71dd47d9db0a92848

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User comments

Apr 09, 2015
Computers do not 'make decisions'.

Apr 09, 2015
Even the von Neumann computers can emulate the neural network and make a decisions in this way. See for example neural network for Arduino. Atmel or ARM microcontrollers are already a competitive platform for this project, because their input power can be reduced to few microampers with various power-saving regimes and smallest chips aren't much bigger than the grain of rice.

Apr 09, 2015
This is the kind of thing I suggested a long time ago as a solution to tracking asteroids and such in the solar system. These things only need a few more abilities to self navigate in space. Like miniature thrusters, imaging and much farther com range to each other, all stuff we are doing now. Then imagine a cloud of them seeded in the outer solar system to find objects, attach to them and report their position relayed through each other to a central data gathering for processing.

It may not be feasible today but the technology to do it is getting closer every day. I think we need to address the issue of identifying everything that will hit us as soon as possible and observatories will never spot everything, let alone with enough advance warning to do something. We need another solution and I don't think the Space Patrol is coming any time soon.

Apr 13, 2015
Fantastic work !
Anything will be computerized !!
You can put it on a mouse or a flying insect and controls it to move and make what you want, even spying using the energy of the animal !
You can follow each flying migrating butterflies !!
You can put in tumors to spread localized drugs at the right dose and moment !!

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