Daily Light Integral

Daily Light Integral is a way to measure how much light is available on average to plants for their absorption. Or, as described on Wikipedia, "Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period."

Hot Stuff

Rather than use a cyanoacrylate or superglue, I use hot glue to keep the connections in place.  I used to have a negative perception of using hot glue because it seemed amateur and trashy. After having dismantled many Furbies and Talking Elmos, I see it frequently makes it in the final product.  I’ve since reconsidered, and now, I like hot glue because it is convenient and can be removed later if there is a need to check a connection or replace a part.

Arduino FastLED Library

Using an Arduino Uno to calibrate an RGB LED strip. The purpose of running this example is to determine what settings are needed to use the FastLED library.  For this example I’m using an Arduino Uno. The Uno has a ground pin next to pin 13, so for convenience, I’m using pin 13 as a low-current Vcc for the RGB LED lights strip:

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