Wednesday grab bag

Another post in an occasional series on the cool stuff people have been doing with their Pis. Sorry for the lack of a post yesterday – total disorganisation on our part. The event we were at yesterday (at which we won a paperweight proclaiming that Eben is Cambridge’s most influential business person, a rather phallic award, and a box of chocolates – hurray chocolates) went on for longer than we’d expected, we didn’t get to do half the things we were meaning to before the end of the day, and we are reminded that it’s probably getting close to time to hire some admin staff, because this diary is becoming a MONSTER.

First up, some competition news. PA Consulting is sponsoring a series of prizes for UK teams. The task is to make something that will make the world a better place, using a Raspberry Pi – you can enter hardware projects or software projects. There are categories for several different age groups from primary school through to university and beyond; this is a competition that adults can enter too. The schools prizes are a generous £1000; for other categories, prizes range from internships to cash prizes. And the first 200 teams to enter will get a free Raspberry Pi – what could be nicer? Read the rules and enter here.

PA Consulting banner

In other competition news, if you submitted an entry to our own Summer Coding Contest (which we’re judging at the moment – we had a lot of really excellent and complicated entries, so it’ll take us another couple of weeks to get through them all), you should have received an acknowledgement email from us. If you haven’t, please email contests@raspberrypi.org.

Yesterday, we learned about the first ever Raspberry Pi supercomputer. A group at Southampton University led by Professor Simon Cox has, with the help of six-year-old son James Cox (the team’s LEGO specialist), built a supercomputer out of Raspberry Pis, a bajillion cables and an awful lot of LEGO. You can read all about it here, and learn how to make your own. Obviously, this is probably not the most economical way to get bang for your MIPS, but it’s a really lucid way to explain how a supercomputer works, and we love it.

Cox pere et fils, and a supercomputer

Prof Cox and James, and the biggest Bramble we’ve seen yet

The Raspberry Pi isn’t just getting a foothold in UK universities. This morning, I was sent this video from the IIIT in Bangalore, an Indian university specialising in information technology. Students there have been making an informational video about setting up the Raspberry Pi. Over to them:

Meanwhile, back in Europe, Ponnuki has a clever little hack to turn a Kindle into a Raspberry Pi e-ink display. E-ink’s something we’ve been very interested in at the Foundation. This kind of very readable low-power display is a really good option for environments where power hard to come by: battery-powered portable systems, solar-powered systems which need a display in out-of-the-way places, and set-ups in developing countries, can really benefit from this sort of technology. You won’t be able to watch video with these refresh rates, but most desktop-type applications are very usable. Right now, it’s very hard to buy such a display as a consumer – they’re usually part of an e-reader device, and even if you’re lucky enough to be able to source one independently, they’re very expensive. We’re watching the sector with interest, and we’re hoping to see prices come down and availability increase – we’re aware of a few companies who are doing really interesting work in this area. But until then, we rather like Ponnuki’s solution.

Raspberry Pi with Kindle as display

Kindleberry Pi. Click the image for instructions on setting up your own.

 


expEYES and Raspberry Pi – an open experimentation platform from India

Liz: Alex Bradbury, one of our volunteers at the University of Cambridge Computer Laboratory (he posts on our forums as ASB), has been talking to other universities about their plans for the Raspberry Pi. I asked him to write a bit for us about one project he’d been telling me about in particular: a hardware/software framework for young hackers and experimenters being developed in India. Over to Alex – and thank you to him and to Dr Ajith Kumar.

Dr. Ajith Kumar of the Inter-University Accelerator Centre, New Delhi recently got in touch with us to share his progress on interfacing the next revision of the expEYES device with the Raspberry Pi. The expEYES (“experiments for Young Engineers and Scientists”) aims to provide a low cost platform for experimentation and education in electronics and physics. The device has 12 bit analog Input/Output, Digital I/O, time interval measurements having microsecond resolution, and several other features accessible from Python. It is packaged with a number of accessories which, with the expEYES software can be used to perform a large number of experiments. For example, the device can be used to study electromagnetic induction, the conductivity of water, to measure gravity by time of flight, alongside many other applications. It aims to enable anybody with elementary Python skills to develop new experiments in addition to the ones already documented.

Ajith and his colleagues at the PHOENIX project have been working on low cost hardware designs to be used in education over a number of years, and all their projects have open, royalty-free designs. The pictures in this post show a new version of expEYES currently under development, aiming for an even lower price point than the original price of $25, or even less under volume production. Their team has been looking for lower-cost alternatives to netbooks for use in conjunction with expEYES, and settled on the Raspberry Pi as a solution. It connects via USB, and Ajith has also designed a version which interfaces through a serial interface using the Raspberry Pi’s GPIO pins.

Much more information about expEYES is available on the project’s website. In
particular, see here for a more in-depth description of the new device and
here for more pictures of the expEYES with the Raspberry Pi. The PHOENIX team
are now working on producing a larger test batch, doing further development on the micro-controller code and then continuing to seek out a path to mass production and global distribution.

 

Ajith is keen to hear your comments and questions, and will be monitoring and responding to the comments of this post.