TV Remote Jammer | 555 Timer Projects | Final Year Engineering Projects

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Remote Jamming Device
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Remote Jamming Device
Introduction

• The project develops a remote jamming device
  which can jam the TV remote rays. It develops IR
  rays of 38 KHz usually emitted by a standard TV
  remote. The rays developed are powerful enough to
  overshadow the IR receiver in TV. This system is
  built by using a 555 Timer in the astable mode
  which is made to produce the higher power pulses
  in the range of 38 KHZ emitted by an IR diode.
  These rays while aimed at TV receiver disables
  the IR sensor built in the TV. Thus, while any
  number is pressed on the TV remote, the IR rays
  sent will not have any effect on TV.

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Remote Jamming Device
Block Diagram
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Remote Jamming Device
Hardware Components

• IR LED
• Timer IC
• Transistors
• Preset
• Switch
• Diodes
• Capacitors
• Resistors

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Remote Jamming Device
Light Emitting Diode

• LED is a two lead semiconductor light source.
• These are typically small (less than 1 mm2 ) and
  integrated optical components may be used to
  shape the radiation pattern.

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Remote Jamming Device
Switch

• Switch is an electrical component that can
  "break" or "make" an electrical circuit.
• The mechanism of a switch removes or restores the
  conducting path in a circuit when it is operated.

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Remote Jamming Device
Operating Principle Of Jammer

• The circuit is nothing but an astable
  multivibrator based on NE555 IC.
• The output of NE555 is amplified using a PNP
  transistor SK100 to drive the IR LEDs.
• Not only TV remotes, but any IR remotes
  operating in the 38KHz frequency region can be
  also jammed by using this circuit.

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Remote Jamming Device
Circuit Description

• Most of the TV remotes have 38KHz operating
  frequency.
• A flood of IR beams in the same frequency can
  easily confuse the TV receiver and this is the
  operating principle of our jammer.
• The output of NE555 is amplified using a PNP
  transistor SK100 to drive the IR LEDs
• Circuit can be adjusted to exactly match the
  jammers frequency to the remotes frequency. This
  adjustment is very essential for effective
  jamming.

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Remote Jamming Device
Purpose of project

• The main purpose of this circuit is to jam the
  sensor of the TV receiver at a particular
  frequency on a desired channel.
• As it jams the TV receiver, it prevents the IR
  receiver from sensing any other signal from the
  TV remote.
• It will also allow the user to jam the volume at
  a fixed range, to avoid irritation by loud noise
  and also prevents from turning TV, ON or OFF by
  remote.

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Remote Jamming Device
TV Remote Jammer Circuit Design

• The circuit is designed to produce a 38 KHz
  signal.
• The main component in this circuit is 555 Timer.
• Here, it is operated in astable multivibrator
  mode.
• In this circuit, 2nd and 6th pins are shorted to
  allow the triggering after every timing cycle.
• These two pins are grounded through the
  capacitor.

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Remote Jamming Device
TV Remote Jammer Circuit Design

• 4th pin is connected to supply to avoid sudden
  resets.
• 3rd pin of 555Timer is the output.
• The current through the IR-LED is limited to
  100mA.

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Remote Jamming Device
TV Remote Control Jammer Circuit Diagram
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Remote Jamming Device
Principle

• TV remote control jammer is for sending a
  constant IR pulse with the carrier frequency of
  the transmitter.
• Hence the result will be non-accepted signal from
  the receiver and therefore no action will be
  taken.
• Basically the TV remote emits a sequence of
  pulses when you press a button.
• IR transmitter is fixed to the surface of the TV
  remote.

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Remote Jamming Device
Principle

• This IR transmitter emits the pulses in unique
  configuration for each button.
• IR receiver which is arranged to TV will receive
  these sequences of pulses that are transmitted by
  TV Remote and identify which button is pressed in
  TV remote.

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Remote Jamming Device
How to Operate this TV Remote Control Jammer
Circuit?

• Connect a 9v battery to the circuit.
• Now adjust the circuit to produce 38 KHz signal.
• And press the TV remote buttons.
• You can observe that TV will not receive any
  commands from remote.

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Remote Jamming Device
How to Operate this TV Remote Control Jammer
Circuit?

• Disconnect the battery from circuit and press TV
  remote buttons again.
• Now you can observe that TV will receive the
  commands from Remote.

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Remote Jamming Device
Advantages

• The circuit will not affect the signal receiving
  capacity of the TV.

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Remote Jamming Device
Disadvantages

• Circuit should be tuned correctly to 38 KHz
  frequency to get accurate results.

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Remote Jamming Device
Applications

• It jams TV on single channel, as it does not
  provide any type of interruption while watching
  the TV. 

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Remote Jamming Device
Conclusion

• TV remote jammer circuits have both advantages
  and disadvantages, these can be considered as
  good and bad both depending on the signal
  intended to be jammed. Further the project can be
  enhanced by using powerful IR diodes such that it
  can be operated from a long distance.

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