The Bug detector is a highly sensitive transmitter detector designed to detect transmitters with an output power as low as 10mW, even from a distance of approximately 15 feet. This […]

In this post we discuss several different types of electronic touch switch circuit, which can be used to toggle an electrical load simply by touching a piece of metal connected […]

This non contact inductive current sensor circuit is designed to detect an alternating current (AC) flow within any circuit and its cables, without undergoing any direct contact with the conductor, […]

This High-Gain Current Sensor circuit can be deployed to detect the availability of low-level current flowing though a PCB’s copper lines or traces. Two straight-pin probes are utilized to form […]

The final circuit we will see deploys the ceramic sensor that is readily available. If you have experienced the difficult to detect the source of a low noise knock or […]

Sound triggered switches are employed in several applications, a few common illustrations being voice controlled tape recorders, baby alarms, burglar alarm systems, and VOX (voice managed switching) techniques of radio […]