Eureka, maybe? The ultimate flow sensor?

May 19, 2010

Lily and I’ve been kicking around different ways to digitally sense flow for the last week, including making our own little propeller/turbine sensor.  Today as we cranked on finishing a proposal we’re working on with NCED and Winona State, I glanced...

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Lily’s first circuit, R&D at LRRD.

May 19, 2010

A big day.  Lily hooked up her first electronic circuit, and hacked some microprocessor code.  My work was interrupted by exclamations of “YES!” and “COOL!” from the lab. Lab sounds I like to hear. Lily has strong skills in biology,...

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How open source happens: hard work.

May 17, 2010

The top photo shows a little windmill at which I’ve been tilting. We’re working on what I hope will be (just like the 1969 version I once owned) the VW Beetle of stream tables.  A practical, dependable, scientifically robust, open source, and...

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Awesome open-source Emriver instrumentation.

May 10, 2010

After quite a few weeks of work we managed today to hack thoughtfully meld a bunch of code and electronics to produce a device that can do three things: 1.  Control a 12-volt pump’s speed and flow output, and 2.  precisely measure that output in...

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Open source science tools at LRRD.

Apr 30, 2010

Here you can see the first operational version of a small Arduino-based flow meter we’ve built based on this open source design. Parts cost is roughly $75.  Compare that with at least $600 for similar commercial models.  And this one can be built from...

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