Cell phone signal jammer DIY

Profile Picture
Posted by jammer from the Food and Beverage category at 17 Jan 2024 02:45:10 am.
Thumbs up or down
Share this page:
A cell phone jammer is an electronic device that blocks signal transmission between a cell phone and a cell tower. By using the same frequencies as cell phones, signal jammers can cause strong interference with communications between callers and receivers. Can effectively block signal transmission from networks such as UMTS, 3G, CDMA, GSM and PHS.
DIY Cell Phone Jammer - Components Required
Resistor R1Emitter Loading
Resistor R2Base Biasing
Capacitor C1Frequency Generation
Capacitor C2Feedback
Capacitor C3Feedback
Capacitor C4Noise Reduction
Capacitor C5Coupling
Capacitor C6Coupling
Capacitor C7Decoupling
Transistor Q1Amplification
Inductor L1Frequency Generation

For any jammer circuit, there must be three important sub-circuits:
  1. Transistor Q1, along with capacitors C4, C5, and resistor R1, forms the RF amplifier circuit. This circuit is responsible for amplifying the signal generated by the tuned circuit. The amplified signal is then directed to the antenna via capacitor C6, which effectively blocks any DC current and permits only the AC component of the signal to be transmitted.
  2. Upon activation of transistor Q1, the collector's tuned circuit is also activated. Comprising of capacitor C1 and inductor L1, this circuit functions as a zero resistance oscillator, generating highly amplified frequencies with negligible damping.
  3. The magnetic charge flowing through the inductor diminishes, causing the capacitor to be charged with an opposing or reverse polarity. This cycle is repeated, and eventually, the inductor charges the capacitor until it reaches zero charge.
  4. The oscillation ceases once internal resistance emerges, marking the culmination of this ongoing process. Prior to reaching the collector terminal, the RF amplifier feed passes through capacitor C5, followed by C6. Capacitors C2 and C3 generate random pulses (noise) at the frequency produced by the tuned circuit.
  5. Tuned circuits are enhanced by RF amplifiers to amplify the frequencies they produce. The combined output of the tuned circuit's frequency and the noise signal from capacitors C2 and C3 is then amplified and transmitted.
June 2023
Blog Tags