Electronics, fluid mechanics, and our new Em2.

Electronics, fluid mechanics, and our new Em2.

We’re wrapping up  the pumping part of our redesigned Em2.  The new model will use electronics to control a 12-volt pump and send flow rate data to an LCD display (and also to a PC via USB and possibly wireless connections). We’re using an Arduino board as...

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 at a...

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, chemistry,...

Research and development at LRRD.

Research and development at LRRD.

I’m way overdue on an LRRD progress report:  We’re doing research and development on several fronts, including sensors and methods for full motion controlled models.  In English that means that things like valley slope, water and sediment discharge,...

Recipe for a river; more on the Braudrick flume study.

Recipe for a river; more on the Braudrick flume study.

More on the Braudrick et al. work published last week: NPR’s Science Friday made a nice little video, in which Bill Dietrich used the phrase “recipe for a river.” Click on the image above to see it. The recipe includes two sizes and densities of...