Spy device detector series#

R2, R3 ensures the op amp inputs act like differential inputs for detecting minute changes in the received electrical signals.

C1 ensures stability to the op amp and avoids stray pick ups.

A2 further amplifies the frequency 10 to 100 times depending on the resistor R4.The output from A1 is sent to the next op amp A2 via C2, which blocks the DC ad allows only the picked AC frequency.The antenna picks up the electrical the disturbances, sends it to the op amp amplifier A1, which amplifies it 10 to 100 times depending on the value of the feedback resistor R1.

Spy device detector series#

Since the two amplifiers are joined in series the total gain is highly enhanced making the circuit highly sensitive to RF interference.īasically the amplifiers work through the following steps: The A1 and A2 stage are identical and both are configured as high gain inverting amplifier circuits. Although the IC has 4 op amps in-built, only two op amps are actually implemented for the bug detector application. The circuit is basically built using the quad op amp IC LM324. Pictorial Presentation Circuit Description NOTE: the sensitivity of the circuit can be adjusted to much higher levels either by increasing the 2M2 resistor value, or by adding two more op amp stages in series with the above design, since we already have two extra op amps in spare inside the IC. The complete circuit diagram can be seen below: Video Test Result However, the circuit idea presented here is not only cheap to build, it also accomplishes the job with utmost perfection.

Identifying such hidden unwanted surveillance system can be impossible without using costly and sophisticated equipment. The hidden spy devices could be inside beds, cupboards, tables/chairs, flower pots, or in fact anywhere a normal individual would least suspect. The bug detector circuit presented here is exclusively developed by me, and can be used for detecting, pinpointing any hidden wireless device or unwanted surveillance planted in a room. Also called anti spy RF sniffer, these are usually used to scan and detect hidden electronic surveillance, that may be installed to secretly monitor a 'target' or an opponent and secretly learn about their plans.īug devices are mostly used by detective agents, police, and secret agents for tracking the behavior of a suspected criminal, or a personal client.