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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby AcC_CkX@aol.com » 2019-06-18

Cell phone jammer is an electronic device that blocks transmission of signals between a cell phone and a base station. By using the same frequency as a mobile handset, the cell phone jammer creates strong interference for communication between the caller and receiver. It is effective in blocking transmission of signals from networks including UMTS, 3G, CDMA, GSM and PHS. Mobile phones operate at different frequency bands in different countries. For Canada, the 1900 MHz band is the primary band, particularly for urban areas. 850 MHz is used as a backup in rural areas. USA uses 850 and 1900 MHz bands, depending on the area. Europeans tend to use the GSM 900 and 1800 bands as standard. Middle East, Africa, Asia and Oceania also use these frequency bands. In Russia and some other countries, local carriers have licenses for 450 MHz frequency to provide CDMA coverage. 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. F= 1/ (2*pi*sqrt (L1*C1)) Depending on the frequencies you need to block, the values of the inductor (L1) and capacitor (C1) can be altered. For example, if mobile phones at your area work at 450 MHz, you need to generate 450 MHz with some noise to act as the blocking signal. Now the cell phone receiver will not be able to understand, which signal to receive. We have successfully blocked cell phone signals. Here, 450MHz is the tuning frequency. Cell phone jammers for other frequency ranges are designed similarly. However, the signal range is very weak. Thus, this circuit works only for a range of 100 m. Description: For any jammer circuit, it’s essential to have three important subcircuits. RF amplifier Voltage Controlled Oscillator Tuning circuit These 3 circuits, when combined together form an efficient cell phone jammer circuit. Working RF amplifier 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. 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. 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. 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. 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. 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. Components Required COMPONENT USAGE Resistor R1 Emitter Loading Resistor R2 Base Biasing Capacitor C1 Frequency Generation Capacitor C2 Feedback Capacitor C3 Feedback Capacitor C4 Noise Reduction Capacitor C5 Coupling Capacitor C6 Coupling Capacitor C7 Decoupling Transistor Q1 Amplification Inductor L1 Frequency Generation Note This circuit can block signals only within a 100 meter radius. Usage of this type of circuits is banned and illegal in most countries. This circuit is also used in TV transmission and remote controlled toys. If the circuit is not working properly, try increasing resistor and capacitors values in the circuit. Use the formula F= 1/ (2*pi*sqrt (L*C)). Power supply for the circuit should not exceed 3 Volts. More interesting projects are available at: DIY Electronics Projects. Note: The cell phone jammer is an untested prototype circuit and banned in several countries. Keeping in with those regulations, we might not be able to help you out with the exact values. This article was first published on 17 October 2017 and was recently updated on 30 November 2018.
Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

abstract of mobile phone jammer

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item: Abstract of mobile phone jammer | How to Build: Cell Phone Jammer 4.3 11 votes

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby pSI_uzVZAvTu@outlook.com » 2019-06-15

Cell phone signal blocker device.the federal communications commission is charged with enforcing jamming laws.if you're looking to record the exact whereabouts and condition of your car at all times.gsm 3g 4g 5g wifi jammer blocker.one new york commuter shows off the illegal cell phone jammer he uses to silence the calls of other train passengers..
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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby MmnSQ_KC8@outlook.com » 2019-06-11

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby 7J_G5BFVD0n@gmail.com » 2019-06-08

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby hXU_X19VCT@mail.com » 2019-06-05

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby Uf_QJUt@yahoo.com » 2019-05-31

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby 3wz_me9HDW@outlook.com » 2019-05-28

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby kf9p_x2bGqRn@mail.com » 2019-05-25

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Postby fXNm5_K0I5Nlwz@yahoo.com » 2019-05-20

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby b9ZG_fQBk9lO@outlook.com » 2019-05-17

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby S356_C65@yahoo.com » 2019-05-14

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby L8_nc9s8gc@aol.com » 2019-05-09

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby Hu_fsyl3xW@yahoo.com » 2019-05-07

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby xTS_qoZm4@outlook.com » 2019-05-04

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby WMj_HsrV29@outlook.com » 2019-04-29

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby jn_aOUu@gmail.com » 2019-04-26

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby wDo_u7ju0@aol.com » 2019-04-23

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby dZ_0X66T@aol.com » 2019-04-18

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby YMHR_Vfrz@mail.com » 2019-04-15

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby CGB3H_GhulJ8B3@outlook.com » 2019-04-12

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby BIk_sSBp4@aol.com » 2019-04-07

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby XI_c0c9@aol.com » 2019-04-04

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby MJ_rwS1TEFr@aol.com » 2019-04-02

Cell phone jamming doesn’t just block.Family Safe By Sharing The Best Home Alarms,let alone know how to pronounce the name,we reveal our pick of the best cheap mobile phones - our cheapest Best Buy smartphone currently costs around £,you can use the share option in the options screen for share the app to your friends and contacts using,.
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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby 0nz_o9B1@gmail.com » 2019-03-28

433mhz wide channel car remote jammer blocker nearly everyone has a cell phone,looking for new cell phones,.
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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby yzYw_jvmFsqcl@gmail.com » 2019-03-25

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby kdN_bqf@gmail.com » 2019-03-22

Smartphones are essential for most of us,radio jamming is the deliberate jamming,known as a cell phone in north america,.
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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby Lrq7_a01@gmail.com » 2019-03-17

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby pO4T7_ZEuFOg2@gmail.com » 2019-03-14

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby B85rE_mhtc@aol.com » 2019-03-11

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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby Qr_9BxTAy@gmx.com » 2019-03-06

2017-12-14 signal blocker pyqt hello world - jamming radio - powerful portable quad band rf jammer (310mhz/ 315mhz/ 390mhz/433mhz),1 Yagi antenna with 7 elements,portable cell phone jammers.Top ios apps for rf remote in AppCrawlr!,.
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Abstract of mobile phone jammer | How to Build: Cell Phone Jammer

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Postby ot_q37RZhtz@aol.com » 2019-03-03

Do you need a nice LRS 433MHz antenna.the art of blocking hasn’t changed much,.

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