BUG DETECTOR


Posted on Feb 4, 2014

This rf detector can locate low-power transmitters (bugs) that are hidden from sight. It can sense the presence of a 1-mW transmitter at 20 feet, which is sensitive enough to detect the tiniest bug. As you bring the rf detector closer to the bug, more and more segments of its LED bar-graph display light, which aids in direction finding. The front


BUG DETECTOR
Click here to download the full size of the above Circuit.

end has a two-stage wideband rf amplifier, and a forward-biased hot-carrier diode for a detector. After detection, the signal is filtered and fed to IC1, an LM3915N bar-graph driver having a logarithmic output. Each successive LED segment represents a 3-dB step.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Circuit Diagram 6 zone alarm independent
DOGM128 with Arduino Hardware
Simple Deadband Generator Targets Push-Pull Drivers
relay flasher circuit
input impedance booster circuit
powerful dc to ac converter schematic
Hewlett-Packard HP-200C audio oscillator
BA313 ALC circuit diagram of a sound recording
Discrete components sound and light control stairs delay switch circuit 4



Top