Eureka, maybe?  The ultimate flow sensor?

Eureka, maybe? The ultimate flow sensor?

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...

Lily’s first circuit, R&D at LRRD.

Lily’s first circuit, R&D at LRRD.

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,...

How open source happens: hard work.

How open source happens: hard work.

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...

Awesome open-source Emriver instrumentation.

Awesome open-source Emriver instrumentation.

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...

Open source science tools at LRRD.

Open source science tools at LRRD.

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...