Fab Academy at AS220 Labs

May 18, 2010 10:25 PM

Final project notes

by Noah Bedford

I initially wanted to do reverse-osmosis water desalination, but then I discovered forward osmosis, which uses ammonia salt to pull the water through membrane, detailed in this page about Yale's evaporative draw-solution system, but then Shawn emailed me a link to Ion Concentration Polarization, which reduces filter clogging, and decided to switch to making an ICP water filtration device with shrinky-dinks In the mean time I noticed that water desalination isn't very fabby, so decided to tack on a PPM/Ph meter and use feedback to calibrate the device.

I then proceeded to accomplish nothing. I don't know how to attach electrodes to anything small, and DuPont doesn't provide samples of Nafion, so I'll have to order some, and right now I'm just concentrating on getting parts together for the salinity meter, but that's a well-documented project I haven't done any research of my own on.

I'm considering switching to building a long-range capacitative+inductive RFID meter with an SD card to do a generic survey of RFID at this point, I guess I didn't panic early enough.

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