Our biosensor array team worked late into the night on Saturday at Pumping Station: One. With the hackerspace challenge build deadline on Tuesday night, it's definately crunch time!
Thankfully we've got a nice array of working sensors (in the order of signal speed):
GSR (Galvanic Skin Response)
Dan yet again played the role of test subject:
The QRD1114QRD1114 sensor from SparkFun contains an IR LED and a compatible phototransistor. It dectects pulse via the change in the amount of infrared light reflected by finger as blood pumps through it.
We observed a great correlation between EKG and pulse oximetry signals: