|Infra Red Jammer Circuit|
Remote jammer circuit can be used to play pranks with your friends and its basically a fun ciruit to try on. And this circuit is very very easy to build and it will take only ten minutes. Also its operation is easy to understand so lets see that hoe this circuit works as a effective remote jammer.
WORKING OF CIRCUIT:
Most of the TV remotes have 38KHz as operating frequency.And a flood of IR beams in the same frequency can easily confuse the TV receiver so that the remote gets jammed.The circuit is nothing but an Astable Multivibrator based on NE555 IC.The output of NE555 is used to drive the IR LEDs. Not only the TV remotes, but any IR remotes operating in the 38KHz frequency region can also be jammed using this circuit.
Here 9V battery is used to power the circuit. And here the POT R4 can be adjusted in order to produce the required frequency used to jam the circuit. The frequency of the above circuit is decided by three major components. They are R1, R3 and C2 Lets do some math to fix the output frequency.
Freq= 1.45 / (R3 +2R1) C2
= 1.45 / (470 + 2*1690)*100*10
= 37.6 Khz
This fixes the frequency of the above circuit and now you are ready to annoy people, Have fun.
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