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Cellphone Network Jammer Circuit Using NE555 Timer

Olayiwola Joy Oluwabukola & Aliu Olaniyi Habib, Volume 3 Issue 1, July 2022 Pages 164-171, Published: 2022-07-25


Cellphones have been a significant way of communication, but sometimes they are also utilized as an instrument to commit crimes thereby affecting the security of the community. Cell phone usage at gas stations and oil refineries is dangerous and terrorist organizations can also make use of cellphone for bomb detonation. Cellphone network jammer helps to solve this problem by disrupting the network in different ways to maximize its effectiveness. Cellphone jammers consist of 3 major parts: the radio frequency amplifier, the voltage-controlled oscillator, and the tuning circuit. The jammer design comprises capacitors, resistors, inductors, transistors and NE555 clock IC to interrupt signal (noise) and also amplifies the generated signal to the lead of 800 MHZ to 1.4 GHZ in other to equal the signal of the cellphone range by the base position. The program and the calculi command will be examined to achieve the intended design. The concept of implementation, if fabricated accordingly, shall breathe fit of interrupting the GSM 900 and GSM 1800 signals coincidentally. The cellphone jammer device efficiently blocks local phones in a given range and can be used in examination halls, conference rooms, and even courtrooms