Their booth will be in the vendor area of the conference, which I believe is open Thursday - Sunday (check the defcon schedule for details). Where to buy - Because Tor does not have a vendor booth this year, I've teamed up with hacker warehouse who has agreed to help sell them at their vendor booth. There is also 3.3v/gnd and other 0.1" holes available for prototyping. There are 0.1" headers for every pin on the xiao. There is one 1.69bis SAO header, finger cuffs used for the GSR sensor, and is run off two AA batts with a boost vreg to 3.3v. The stock firmware also outputs the raw data over serial USB to allow further analysis of the data on a computer. Hardware - It is run off a cortex M0+ arduino based xiao, that you can connect to via USB-C. Use it to interrogate your friends, or to practice how to get through your next fed-job interview The output of these sensors with some statistics is graphed to each of the two 1.3" OLED screens. ![]() These are two of the sensors used in a polygraph machine. The badge has two primary sensors, a GSR sensor and a heart rate sensor. What it does - It acts as a mini lie detector. I received the working boards so it looks like this is happening, here are the details:
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