Cell Phone Signal Jammer DIY

ashokarunplay

signal jammer produce an anti - frequency signal .hence,mobile cannot identify the correct signal.so the signal will jammed automatically.[br][br]FORMULA:-[br]The use of different frequencies makes it difficult to have a jammer for all frequencies. However, the below mentioned formula can be used to calculate the required values.[br][br]F= 1/ (2*pi*sqrt (L1*C1))[br][br]Depending on the frequencies you need to block, the values of the [a href="https://electronicsforu.com/videos-slideshows/electronics-basics-coilsinductors"]inductor[/a] (L1) and capacitor (C1) can be altered.[br][br]COMPONENTS REQUIRED:-[br][br]1.Resistor R1 for Emitter Loading.[br]2.Resistor R2 for Base Biasing.[br]3.Capacitor C1 for Frequency Generation.[br]4.Capacitor C2 for Feedback.[br]5.Capacitor C3 for Feedback.[br]6.Capacitor C4 for Noise Reduction.[br]7.Capacitor C5 for Coupling.[br]8.Capacitor C6 for Coupling.[br]9.Capacitor C7 for Decoupling.[br]10.Transistor Q1 for Amplification.[br]11.Inductor L1 for Frequency Generation[br][br]CIRCUIT DIAGRAM:-[br][img src="/storage/emulated/0/Download/Mobile-Jammer-Circuit-Diagram-1.jpg"][br][br]WORKING:-[br]Working[br][br][ul][li]RF [a href="https://electronicsforu.com/tag/amplifier"]amplifier[/a] circuit comprises of the transistor Q1, capacitors C4, C5 and resistor R1. This RF circuit amplifies the signal generated by the tuned circuit. The amplified signal is given to the antenna through capacitor C6. It blocks DC and allows only the AC component of the signal to be transmitted.[br][/li][/ul][ul][li]When transistor Q1 is turned ON, the tuned circuit at the collector turns ON. The tuned circuit consists of capacitor C1 and inductor L1. This acts as an oscillator with zero resistance. It produces very high frequency with minimum damping.[br][/li][/ul][ul][li]When the circuit is ON, voltage is stored in the capacitor. Once the capacitor is completely charged, it allows charge to flow through the inductor. When current flows through the inductor, it stores magnetic energy corresponding to the voltage across the capacitor. At a certain point, the inductor reaches its maximum and the charge or voltage across the capacitor turns to zero.[br][/li][/ul][ul][li]Now the magnetic charge through the inductor decreases and the current charges the capacitor in opposite or reverse polarity. The process repeats and after a while, inductor charges the capacitor and becomes zero.[br][/li][/ul][ul][li]This process runs till internal resistance is generated and the oscillations stop. RF amplifier feed is given through capacitor C5 to the collector terminal before C6. The capacitors C2 and C3 generate pulses in a random fashion (noise) at the frequency generated by the tuned circuit.[br][/li][/ul][ul][li]The RF amplifier boosts the frequency generated by the tuned circuit. The frequency generated by the tuned circuit and the noise signal generated by the capacitors C2 and C3 is combined, amplified and transmitted.[br][/li][/ul][br]