Editing Pulse Necklace 02Aug2009

=Sensebridge Meeting Notes about Pulse Choker=


==Research Links==

[http://www.freshpatents.com/12-lead-ecg-fabric-electrode-belt-system-dt20080313ptan20080064970.php 12 lead ECG fabric electrode belt system patent]

[http://www.springerlink.com/content/7n504t0101723486/  Wearable ECG Monitoring System Using Conductive Fabrics and Active Electrodes]

[http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F4489863%2F4496790%2F04496911.pdf%3Farnumber%3D4496911&authDecision=-203 Preliminary study of dry knitted fabric electrodes for physiological monitoring]

[http://www.google.com/url?sa=t&source=web&ct=res&cd=10&url=http%3A%2F%2Fwww.hitech-projects.com%2Feuprojects%2Fmyheart%2Fpublic%2Fpublic_results_documents%2Fdocuments%2F3rd%2520IEEE%2520EMBS%2520ISSS-MDBS%25202006%2520CDROM%252001-2142.pdf&ei=Ut51SpCXDYL0sgOT7N37CA&rct=j&q=fabric+electrode&usg=AFQjCNGoE7XFKopzaMUlV5hjZ3WhV8ALQg IEEE sensing fabric paper]

[http://www.medicalnewstoday.com/articles/97854.php FDA clearance on Textronic fabric ECG electrodes]

Eric has filled out the "purchase" form on Textronics fabric electrode kit, and will follow up with them in order to get the kit.  Rachel, Chung-Hay and Eric will split the cost.

Chung-Hay found this awesome [http://www.fashioningtech.com/profiles/blogs/a-vest-that-collects heart-rate collecting vest], see more at the [http://www.realitydisfunction.org/heartdonor/ project page]

Someone at the meeting recommended the [http://www.amazon.com/Ramsey-ECG1-Electrocardiogram-Heart-Monitor/dp/B0002NRIOG Ramsey ECG1 heart monitoring kit], see the [http://www.ramseyelectronics.com/downloads/manuals/ECG1.pdf manual, with assembly instructions].  $45, and it's got both audio and o-scope outputs, along with some adjust-ability.  Might be worth buying, even if the Open ECG guy comes through.

Check out this super cool [http://www.kobakant.at/DIY/?p=1548 stretchy fabric cable]

Both the [http://softwear.cc/ Softwear] and [http://www.kobakant.at/DIY/ Kobakant DIY] sites have a whole bunch of awesome information on soft circuits and components.  No doubt there are lots of interesting ideas to be mined!

==Optical Pulse Circuit Experimentation==

We soldered leads unto the emitter/transmitter device, and held it against various body parts:

<ul><li>Neck: no flashing, despite many attempts on both of us</li>
<li>Wrist: Eric got it to work once on his wrist, but generally this fails</li>
<li>earlobe: Eric got it to work a few times, this was actually the most promising area after thumb</li>
<li>Thumb/finger: the original, still very flaky, works maybe 25% of the time</li>
</ul>

==Prototype Armature/Display==

We prototyped a choker today.  We cut a "T" circuit silk screen mask out of a cool piece of flexible plastic, and then painted the silver conductive paint unto the mesh fabric.  Then we soldered multi-color cycling LEDs unto the traces, and wires unto the dongle end, and stuck them into an arduino.

Code:
<pre>
int LeftNeckLED = 6;
int RightNeckLED  = 8;


void setup() {
  pinMode(LeftNeckLED, OUTPUT);  
  pinMode(RightNeckLED, OUTPUT);
   digitalWrite(LeftNeckLED, 1);
   digitalWrite(RightNeckLED, 1);
}


void loop() {
   digitalWrite(LeftNeckLED, 1);
   digitalWrite(RightNeckLED, 1);
   delay(500);
   digitalWrite(LeftNeckLED, 0);
   delay(6000);
   digitalWrite(RightNeckLED, 0);
   delay(30000);
}
</pre>

Photos:

[[Image:Choker_Proto.jpg]]

[[Image:Chung-Hay_Proto.jpg]]

[[Image:Eric_Proto.jpg]]