Everyone has had something in their home or workplace fridge go missing, and now a do-it-yourself lie detector may help locate the culprit.
A USB polygraph was created by a maker and powered by an Arduino Mini that collects data from sensors and sends it via serial to a computer where a Python program takes that data, graphs it and allows users to save and manage questions and add answer markers to the graphs to be inspected later.
While the polygraph is designed for personal use, its maker, Juan GG Projects, said the polygraph explores how biometrics can be incorporated into Arduino and the developer board may be used to create a more professional model in the future.
The polygraph’s sensors include a galvanic skin response sensor that can measure changes in skin resistance, which can signal that someone is lying. A pulse sensor generates a voltage proportional to changes in pressure resulting from blood flow in a finger, as an indication of changes in blood pressure. Likewise, a breath sensor measures if someone’s breath accelerates during questioning.
To build an Arduino-powered polygraph, get the details at Github.
