Why not use this brand new FOSS, more powerful, similarly priced board instead.
On Saturday, September 7, 2013 3:17:15 AM UTC-7, Marc Dusseiller wrote:
-- https://mchck.org/about/ MC HCK (pronounced: "McHack" [mæk hæk])
Generating audio would also be easy, as either modem (FSK) or tones (DTMF). The bit rate for data is very low so DTMF would be fine.
This board (Freescale, 32-bit) would be more capable than the MSP430 (TI, 16-bit). Either way, there is no flash room for usb-host stack of a USB bluetooth dongle so that is not in scope. A dedicated radio chip (non-USB) would be very interesting, there are details on the mc hck site.
--
## Jonathan Cline
## jcline@ieee.org
## Mobile: +1-805-617-0223
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On Saturday, September 7, 2013 3:17:15 AM UTC-7, Marc Dusseiller wrote:
hello fellow bio-tinkerers, hi sebastian,the topic of cheap turbidity meters popped up again in another discussion.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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