Amazon.com : DIY-JEK Stud Finder Wall Scanner, Upgraded 6 in 1 Electronic Stud Detector Sensor with LCD Display & Audio Alarm for Wood Metal AC Live Wire Detection, Joist Pipe, Copper Tube
$2 cable tracer circuit - YouTube
Homemade Non Contact Voltage Tester! - YouTube
JS-60 DIY Kit Metal Detector Kit Electronic Kit DC 3V-5V 60mm Non-contact Sensor Board Module DIY Electronic Part Metal Detector
DIY Silicon Photodiode Particle Detector directly from CERN - Electronics-Lab.com
Simple Broken Wire Detector
DIY Particle Detector | S'Cool LAB
Build your own Live Wire Detector for Contactless AC Voltage Detection
How to make a cheap Cable Finder - DIY Tutorial - YouTube
Minimal metal detector made with an Arduino and a coil of wire | Arduino Blog