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  Skin conductance, galvanic skin response, electrodermal activity: What is the phenomenon that describes how electricity is conducted across human skin? In this video, we'll take a quick look at the history and the mechanism of electrodermal activity, how it's used, and whether we can trust the results. If you want to know how a lie detector works, how a love tester works, or how an e-meter works, then sit down for a quick primer! ...
I'm a bit of a sucker for retro electronic novelties, and one of the most prolific is the "love tester" device that--in various forms--hearkens back to the early 20th century and the heyday of the penny arcade. These were often an electromechanical device that used some algorithm (or even just a random number generator) to ring bells, flash lights, and indicate either a fortune or--more often--a rating of one's romantic prowess. In the 1960s, Nintendo released their first (in what would prove to ...
I am, by no means, a software engineer. My code is crude at best, but it works   /* * Project Eros * CC-BY-SA Matthew Eargle * AirborneSurfer Productions * for element14 Presents * * airbornesurfer.com * element14.com/presents */ #include <Servo.h> Servo needle;   // create servo object "needle" to move the needle // declare global variables const int numReadings = 10; int readings[numReadings];      // the readings from the analog inpu ...
It's a pretty simple vector design for the face of the unit if you want to build something similar. The STL file is for the needle that attaches to the servo motor. ...