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Hey, great idea, it'd be super awesome to have a USB-capable
pulse-oximetry device. I haven't heard of such a thing, at any
price, though you're probably right that expensive ones exist. I
once hacked a cheap ($30) finger-clamp one in order to get out the
heart-beat information, but basically all I did was wire into the
LED display - it had a little display with 5 LEDs serving as a kind
of bar-graph display for the signal from the heart, so all I did was
wire into the 3rd and 4th LED, and feed that into the digital pins
on my microcontroller. Easy hack. But I imagine it wouldn't be
that much harder to find e.g. the control circuitry for the display
and reverse it to get out the characters that are being shown (and
thus the oxi-reading). Feed that into a new Uno arduino and you
could write the USB-interfacing stuff. I'd love to help but sadly
I'm in Toronto now. Hopefully someone will step forward to help you
out!<br>
<br>
Eric<br>
<br>
<br>
On 6/1/11 8:31 PM, Kevin Burton wrote:
<blockquote
cite="mid:BANLkTime8fiHq4UbUPuYWpVX6sPRKkuibw@mail.gmail.com"
type="cite">Hey gang.
<div><br>
</div>
<div>Long story short. I'm a data/fitness/compsci geek.</div>
<div><br>
</div>
<div>I've been aggressively tracking all of my body telemetry as
part of my long term project to improve my health (and live at
peak physical condition).</div>
<div><br>
</div>
<div>Here are a few links:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://feedblog.org/2011/04/19/on-polysomnographs-apnea-oximeters-ant-and-data-recorders/">http://feedblog.org/2011/04/19/on-polysomnographs-apnea-oximeters-ant-and-data-recorders/</a></div>
<div><a moz-do-not-send="true"
href="http://feedblog.org/2011/04/17/reflecting-on-my-recent-sleep-experiments/">http://feedblog.org/2011/04/17/reflecting-on-my-recent-sleep-experiments/</a></div>
<div><a moz-do-not-send="true"
href="http://feedblog.org/2011/03/29/the-horrible-problem-of-synchronized-fitness-data/">http://feedblog.org/2011/03/29/the-horrible-problem-of-synchronized-fitness-data/</a></div>
<div><a moz-do-not-send="true"
href="http://feedblog.org/2011/03/19/my-quantified-self/">http://feedblog.org/2011/03/19/my-quantified-self/</a></div>
<div><br>
</div>
<div>I'd like to now build a cheap home polysomnograph.</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://en.wikipedia.org/wiki/Polysomnography">http://en.wikipedia.org/wiki/Polysomnography</a></div>
<div><br>
</div>
<div>I did a bunch of research and a professional ONE NIGHT visit
to a sleep clinic to get a polysomnograph is $2500.</div>
<div><br>
</div>
<div>So what I want to do is basically buy a cheap oximeter to
measure blood oxygen and heart rate.</div>
<div><br>
</div>
<div>A recent paper was released showing that oximetry is the
leading indicator of apnea and that this $2500 polysomnograph is
just a waste of money (I can find the link if someone wants it
but I have to track it down).</div>
<div><br>
</div>
<div>But these oximeters are cheap... $24.</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.google.com/products/catalog?client=safari&rls=en&q=oximeter&oe=UTF-8&um=1&ie=UTF-8&tbm=shop&cid=312759277086602921&sa=X&ei=I9nmTZ3zEoT0swPxpOSKCw&ved=0CJIBEPMCMAE#ps-sellers">http://www.google.com/products/catalog?client=safari&rls=en&q=oximeter&oe=UTF-8&um=1&ie=UTF-8&tbm=shop&cid=312759277086602921&sa=X&ei=I9nmTZ3zEoT0swPxpOSKCw&ved=0CJIBEPMCMAE#ps-sellers</a></div>
<div><br>
</div>
<div>The problem is that none of them have PC integration support.
There is a chinese company that has one for USB but Windows
only drivers and it's $150.</div>
<div><br>
</div>
<div>These are designed to be spot monitors.</div>
<div><br>
</div>
<div>I think the reason is that the market for more professional
ones is like $500-1000 for "professional" home monitoring.</div>
<div><br>
</div>
<div>What I'd like to do is buy one of these cheap ones and mod
the hardware to interface with USB and then publish the specs on
how to mod them.</div>
<div><br>
</div>
<div>I'm not a hardware hacker though... nor do I have any real
motivation to work on hardware. This is a one time project.</div>
<div><br>
</div>
<div>Any pointers? I can do the software and analytics component
of this and will volunteer myself as a guinea pig. I just need
a USB interface for the oximeter data..</div>
<div><br>
</div>
<div>Kevin</div>
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