Simple Mobile Jammer Circuit
Diagram: Cell Phone Jammer Circuit
Explanation: If you understand the above circuit, this
circuit analysis is simple and easy. For
any jammer circuit, remember that there
are three main important circuits. When
they are combined together, the output
of that circuit will work as a jammer. The three circuits are
RF amplifier.
Voltage controlled oscillator.
Tuning circuit.
So the transistor Q1, capacitors C4 & C5
and resistor R1 constitute the RF
amplifier circuit. This will amplify the
signal generated by the tuned circuit.
The amplification signal is given to the
antenna through C6 capacitor. Capacitor C6 will remove the DC and allow only
the AC signal which is transmitted in
the air.
When the transistor Q1 is turned ON, the
tuned circuit at the collector will get
turned ON. The tuned circuit consists of capacitor C1 and inductor L1. This tuned
circuit will act as an oscillator with zero
resistance.
This oscillator or tuned circuit will
produce the very high frequency with
minimum damping. The both inductor and capacitor of tuned circuit will
oscillate at its resonating frequency.
The tuned circuit operation is very
simple and easy to understand. When
the circuit gets ON, the voltage is stored
by the capacitor according to its capacity. The main function of capacitor is to
store electric energy. Once the capacitor
is completely charged, it will allow the
charge to flow through inductor. We
know that inductor is used to store
magnetic energy. When the current is flowing across the inductor, it will store
the magnetic energy by this voltage
across the capacitor and will get
decreased, at some point complete
magnetic energy is stored by inductor
and the charge or voltage across the capacitor will be zero. The magnetic
charge through the inductor will
decreased and the current will charge
the capacitor in opposite or reverse
polarity manner. Again after some period
of time, capacitor will get completely charged and magnetic energy across the
inductor will be completely zero. Again
the capacitor will give charge to the
inductor and becomes zero. After some
time, inductor will give charge to
capacitor and become zero and they will oscillate and generate the frequency.
This circle run upto the internal
resistance is generated and oscillations
will get stop. RF amplifier feed is given
through the capacitor C5 to the collector
terminal before C6 for gain or like a boost signal to the tuned circuit signal.
The capacitors C2 and C3 are used for
generating the noise for the frequency
generated by the tuned circuit.
Capacitors C2 and C3 will generate the
electronic pulses in some random fashion (technically called noise).
The feedback back or boost given by the
RF amplifier, frequency generated by the
tuned circuit, the noise signal generated
by the capacitors C2 and C3 will be
combined, amplified and transmitted to the air.
Cell phone works at the frequency of
450 MHz frequency. To block this
450MHz frequency, we also need to
generate 450Mhz frequency with some
noise which will act as simple blocking signal, because cell phone receiver will
not be able to understand to which
signal it has been received. By this, we
can able to block the cell phone signal
from reaching the cell phones.
So here in the above circuit, we generated the 450 MHz frequency to
block the actual cell phone signal. That’s
what the above circuit will act as a
jammer for blocking the actual signal. Note: This circuit will work in the range of 100
meters i.e. it can block the signals of cell
phones with in 100 meters radius.
Usage of this type of circuits is banned
in most of the countries. Usage of this
circuit is illegal and if you caught by using this circuit, you can be imprisoned
and also should pay large amount in the
form of fine.
This circuit can be used in TV
transmission and also for remote
controlled toys or play things. If the circuit is not working, just
increase the resistor and capacitors
values in the circuit. Increase the
frequency of tuned circuit by using this
formula F= 1/ (2*pi*sqrt (L*C)). Increase
the inductor capacitor circuit components value for increasing the frequency.
