This is for all the spies/paranoid people out there. An essential piece of equipment for any spy is an Electronic Bug Detector. You never know what government agency may be trying to listen in on your conversations or trying to secretly video tape you.
The Electronic Bug Detector is basically a broad-band receiver. It picks up frequencies on the FM band between 80Mhz and 150MHz. If a bug with a sensitive microphone is transmitting nearby, the result will be a feedback whistle on the detector. The frequency range of this device is limited and well under what any real surveillance equipment uses. But it is great for detecting small DIY FM transmitters such as my FM Listening Bug.
In this Instructable we will cover: