hello fellow bio-tinkerers, hi sebastian,
i have been developing simple laser-cut shields for arduinos. or also stand-alone units to measure light-absorbtion through the standarized cuvettes:
sorry for the lousy docu sofar...
http://hackteria.org/wiki/index.php/DIY_spectrophotometer#BabyTurbiduino_aka_Daphna-2-MIDI_Converter
laser cutting seems to me more useful for this application. good precision and much faster production. the cut sides of the wood is nice black and light absorbin/non-reflecting. and the device can be assembled layer by layer, embedding the LED and sensors into an optical channel.
at the moment we are using something like a digistump clone, we call it babygnusbuino, based on attiny85 and compatible to arduino ide. it can send/receive data as a midi-device and costs less than 5$. but we have been thinking of additionally communicating to the device using an audio-protocol, meaning we could use the line-in of a smart phone to read the data.
more soon,
marc
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