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Open graphing calculator: Beagleboard + R
Posted: August 6th, 2010, 12:46pm MDT by Mike Szczys
It looks like we missed the boat on this one but just in case you missed it everywhere else on the Internet, last Saturday [Matt Stack] introduced the world to a completely open source calculator. This marries two heartily tested open source projects; the R Project for Statistical Computing and the Beagleboard. The hardware side [...]
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Miniscule intervalometer
Posted: August 6th, 2010, 11:00am MDT by Mike Szczys
Calling this intervalomemter small would be a glaring understatement. It’s tiny enough to fit inside the plastic cover for a 2.5mm jack for use with a Canon DSLR camera. We should point out that the image we put together is a bit misleading. The picture of the jack is version 1 of this circuit and [...]
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Dummy loads and heat sinks
Posted: August 6th, 2010, 8:54am MDT by Mike Szczys
In [Dave's] latest episode of the EEVblog he takes a look at constant current dummy loads. These are used to test power supply designs and instead of just chaining resistive loads together every time he’s decided to look into building a tool for the job. What he ends up with is a reliable constant current [...]
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Make your own Mindstorm sensors
Posted: August 6th, 2010, 7:29am MDT by Mike Szczys
[Stewart Allen] acquired a Mindstorm kit about a month ago and he’s already building his own sensors for it. He wanted a more accurate range finder with a narrower measurement field than the stock sensor. Mindstorm has the option to communicate with sensors via an I2C bus. [Stewart] set up an ATtiny45 to act as [...]