With a 200 foot depth rated housing and a 6 foot maximum detection range, the Pulse 8X from JW Fishers is the company's top of the line detector. It's heavy duty construction and high sensitivity make ...

Figure 1 shows a way to control a light (or other 120-V ac appliance) with a passive-infrared (PIR) alarm sensor. The original concept was to turn a closet or shop light on whenever someone went into.

The objective of the GoldPic 3 project is to detect coins and jewelry in shallow water and on the beach by optimizing the timing and circuitry for detecting small items. Using readily obtainable low ...