Just a quick update on the Bluetooth Polygraph project. More description is coming soon - possibly full documentation before the Waterloo Maker Faire this weekend - but this'll have to do for now. The PCB has been assembled, and two of the three sensors tested: The pulse sensor (actually a Pulse Sensor Amped) and the GSR sensor (based on / blatantly copied from Make's Truth Meter) both work nicely over Bluetooth. A processing app is currently graphing the data on a strip chart. I still have to build the respiration sensor, and get the app working on my Nexus 7, but I've already tried [ Read More ]
