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From Lego robots to hammers and nails, Linux gets embedded

Garage shows where technology is headed
By John Fontana , Network World , 08/08/2008
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The computing industry is familiar with the low-cost lab known as the garage, a historic hot-bed for innovation, and this week LinuxWorld had its own "garage" to showcase embedded Linux.

From a wirelessly controlled Lego robot to a device designed to aid information sharing in third-world countries, a number of small vendors and independent thinkers were on hand to showcase the possibilities inherent in embedded Linux.

The nonprofit organization Literacy Bridge  showed off its Talking Book Device, which uses a low-cost digital audio recorder that also includes playback for distributing the spoken word.

The device, which will cost under $10 and is slated for production in mid-2009, is targeted at developing countries where aid workers must pass on critical and often life-saving information to local people who have no way of taking notes. The Talking Book provides a library of easily retrievable recordings on such topics as helping mothers recognize the symptoms of TB or explaining how best to treat dehydration in their children.

The device features a built-in USB cable for uploading and downloading information either between devices or from external sources. A built-in microphone lets users record conversations or specific instructions. It is powered by batteries available in the regions where it gets used.

"It's a way to replace the Internet for document distribution," says Cliff Schmidt, executive director of Literacy Bridge. "But this is not just about distributing knowledge; it is a library of information."

The Talking Book uses a 16-bit Generalplus 96 MHz microprocessor, similar to those found in talking toys, along with embedded Linux.

The Literacy Bridge plans to develop an emulator version for testing, an authoring application, a kiosk application and a content Web portal where relief workers can download content.

"We are planning a pilot project in two months in Ghana, but we can always use help such as time or financing," says Schmidt.

In contrast, the Linuxstamp project, a general-purpose processor module that includes a standard Linux kernel, an SD card, Ethernet and a USB/serial converter. It can be used in initial product design so users don’t have to build an entire motherboard.

Linuxstamp developer Paul Thomas says the project is an example of "open source hardware" because he makes the instructions for building the hardware freely available. Pre-built modules are also available for $120.

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