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

Remote Jamming Device

http://www.edgefxkits.com/

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.

Introduction


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Block Diagram










Hardware Components

IR LED Timer IC Transistors Preset Switch Diodes Capacitors Resistors











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.











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.











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.











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 jammer’s frequency to the remotes frequency. This adjustment is very essential for effective jamming.











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.











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.











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.

TV Remote Jammer Circuit Design












TV Remote Control Jammer Circuit Diagram










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.











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.

Principle











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.











Disconnect the battery from circuit and press TV remote buttons again.

Now you can observe that TV will receive the commands from Remote.

How to Operate this TV Remote Control Jammer Circuit?











Advantages

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











Disadvantages

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











Applications

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











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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