This allows a TSCM specialist the ability to `blink` a Spectronics bugging device on for a second or two to detect it, and then to shut it back down before the eavesdropper catches on to the fact that his bugging device has just been caught. There is a small number of 12 bit `house` activation codes that can be run though in less than a second, bu
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t they are only 6-8 in total. If you can`t hit it with the basic sequence then you will have to run though the full 12 bit sequence which will till take you less than ten minutes. The signal is transmitted at 433. 92 MHz as a AFSK data stream so most of you will have no problem getting the bug to give itself up (cracks about Prom dresses not withstanding). The entire RF TRANSIT section shuts down when these things go into sleep mode, but the RECEIVE section stays awake on monitors the command channel all the time. The bugs are EXTREMELY easy to find them if you can use the bypass codes (less than a second), or the full sequence (less then 10 minutes) due to the small size of the activation key, and known activation frequency. You can also find these little bugs by purchasing 8 ea car alarm remote (12+ bits) and simply pressing the button of each remote in sequence. You will need to reprogram in each of the remote activation codes into the remote, but your only talking about a sequence that is two bytes long (please stop laughing at such a simple method to find them). A company called Oregon Scientific and Davis Instruments makes a line of Wireless Digital Thermometers that operate on the same frequency as, use the same bit stream as, and operate similar to these Spectronics Eavesdropping devices. The only problem with these thermometers is that if you have a Spectronics eavesdropping system nearby you run the risk of...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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