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IT consultant Gordon Henderson gave a demonstration of his Lego PiTrak Mk1.
Henderson's device began life as a Big Trak, a programmable six-wheeled toy from the 1980s. The project calls for the original control board to be replaced with a Raspberry Pi and for the addition of remote control and sensors.
The car uses a Raspberry Pi mounted on an Adafruit Prototyping Pi Plate, with sides built out of Lego.
Image credit: John Honniboll
When it launched in February, supply of the Raspberry Pi failed to keep up with demand. O'Donohoe began setting up Jams as a way for people who hadn't yet managed to get their hands on a Raspberry Pi to see the device in action.
O'Donohoe is now leading efforts to set up an international network of Raspberry Pi groups and Jams. The network has about 35 groups in countries around the world, including the UK, US, Europe, Singapore, Australia and Canada.
"The thing about the Raspberry Jam is that all you need is a space and some people to come together, and I'm just encouraging people to go out and hold one themselves," O'Donohoe told ZDNet. "If people need some guidance, talk to somebody else near them, or go to a Raspberry Jam, see what it's like and then hold one. You could even hold one in your kitchen!"
O'Donohoe is also keen to see more young people and families involved in the Jams, and cited the example of a nine-year-old presenter at an event in Cardiff and a 15-year-old who organised another Jam in Wales.
"We've had some really inspirational settings. And the people bring so much along to these things — hopes and ideas and projects that they've developed."
Image credit: Richard Pitkin/BB Science Park