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Biosensor Array Galvanic Skin Response (view source)
Revision as of 19:25, 1 May 2011
, 19:25, 1 May 2011no edit summary
http://www.produceconsumerobot.com/truth/content/Truth_Circuit.png
http://www.produceconsumerobot.com/truth/content/Truth_Circuit.png
== Finger cuffs & contacts ==
One key part of GSR is how the two probes will attach to the body to measure skin resistance. All GSR projects I found use the fingers, either one or two.
Options:
* Thumbtack
** The first circuit I built was the [http://www.arduinoevilgenius.com/projects 'Evil Genius...Arduino'] book Lie Detector circuit which used thumbtacks in a breadboard. I also used this when I built the [http://www.chris3000.com/archive/galvanic-skin-response/ Chris3000 GSR] circuit but didn't get very good results.
* Nuts
** [http://courses.cit.cornell.edu/ee476/FinalProjects/s2006/hmm32_pjw32/index.html Cornell EDA] and [http://www.chris3000.com/archive/galvanic-skin-response/ Chris3000 GSR] use nuts soldered onto the ends of wires. I never tried this.
* One Finger Strap
** I ordered the [http://www.makershed.com/ProductDetails.asp?ProductCode=MKSM1&Click=19209 Truth Wristband kit] which came with finger strap which I built. It goes onto one finger and has two silver tabs in it which as the two GSR probes.
* Two Finger Straps
** I built these according to the [http://makeprojects.com/Project/The-Truth-Meter/703/1 Truth Meter] instructions. Velcro tape has copper foil attached with a wire soldered onto it.
Issues:
** Never thumbtack or nut is ideal as one needs to press against or hold onto. Ideally for the biosensor array, one needs to be able to move freely within the classform
== Measuring Actual Skin Conductance ==
== Measuring Actual Skin Conductance ==
