Picture of TV Remote Jammer!
I've had a few scuffles in my house over the TV remote so I decided to do something about it. I built a circuit that will block my TV and any device I choose from getting a signal from the normal remote control. I turn an ordinary remote into a jammer and the remote still works normally! Watch the video to see it work.

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Step 1: What you need...

Picture of What you need...
I chose to use a Sony remote control (SR-P30) because it has plenty of room inside to add my circuit and a 9 volt battery while keeping the remote fully functional.

The circuit parts:

1. Small circuit board
2. (1) 10k variable resistor
3. (1) 555 Timer
4. (4) resistors. 470ohm, 1k, 560ohm
5. (2) high speed switching diodes 1N4148
6. (1) transistor - BC557
7. (2) Infrared LED's
8. (2) 10nf capacitors
9. (1) 9 volt battery

Build the circuit based on the diagram below.

Step 2: Install the circuit...

Picture of Install the circuit...
I hot glued the circuit inside the remote control. I also had to remove 2 posts to make room for the 9 volt battery. Tape down the LED's near the existing LED. I used the existing switch on the remote and wired my 9 volt battery to it.

Step 3: Test it out!

Picture of Test it out!
You may have to tinker with the 10k pot to get the frequency right for the device you are targeting. Adjust the pot while the remote is 'on' and test it with the original remote until the jammer confuses the device. Now, just pull out the remote whenever you need to take control of your device and no one will have any idea what's going on. You can bring this to a friends house and drive them nuts! Have fun, be safe!
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ewilhelm7 years ago
There is a howcast video on YouTube showing how to do this exact thing much better than his video or instructable.
JayPeeeeeee10 months ago

Never thought this would be so cool

(removed by author or community request)
Kipkay (author)  teaaddict3147 years ago
Oh crap, here we go again! Can't I do a single Instructable without someone claiming it is harmful, illegal, immoral or dangerous?? Next time I will do one on how to watch paint dry. But then again you could hurt your eyes doing that. Geez!
aalejo Kipkay1 year ago

let bong pipes out and relax sir lol hahahaha

thetre Kipkay1 year ago
i've got the evil genius book, and i reccomend it t anyone who like these sort of gadgets. it has tons of ideas and easy to hard projects to make. BUT from what i remember, yours doesn't copy the authors idea.
gdawg Kipkay7 years ago
OMG. I heard these things violate FCC rule 332.23.a64 part d, subsection F, paragraph 9. This is so illegal, I can't believe you do these things. According to my research on the internets, this is very un-american, as only communists make these, and kittens die from exposure to the cancer rays. In seriousness: how does this jammer work? Is it basically so 'bright' that the receiver doesn't distinguish the IR signal from the real remote? Sorry, I should go to your website; but at the same time I think an instructable should have more instructions on it, rather than a link to the instructions. This is a cool device nonetheless.
Kipkay (author)  gdawg7 years ago
Thanks for the input. I've added another step, How Does it Work. Let me know if I explained it well enough. Thanks!
would it be possible to make a bug lazer killer (you know like pointing a storong lazer at a bug and watch it cook) you can find that location of the bug in a 3D field useing a sonar device to see anything out of the ordinary feed back ( a distance only sensor will be needed to be triangulated with a second useing the same system, as will a direction only sensor) or a window blocker useing several strong lazers and a similar, but more mission impossible laser field array like the one used in a video of yours for cheap home protection
I looked inside my remote, and i saw a violet/dark purple led.
is it an IR led?
gdawg Kipkay7 years ago
Ah, this is definitely well enough. Thanks!
The FCC does not control infrared, so happy jamming!
It's FCC rule 332.23.a64 part d, subsection F, paragraph 8. Duh.
Kipkay (author)  JamesRPatrick7 years ago
Close. It's FCC rule 332.23.a64 part d, subsection F, paragraph 8a, article 5, section 6b.
Where do you find the rules over 100? On the fcc site it only says 101 and stops.
Hold on, let me check again...Damn, you're right.
no. the sun ( and light bulbs) puts out enough infrared light to do that.....if it where a problem. the receiver is designed to block out ambient light, and pick up only a certain frequency and signal.
VIRON gdawg7 years ago
FCC does not have a rule about it... Perhaps until someone hooks up a remote jammer to a million IRLEDs and turns off all the TV's in the metropolitan area during the big game.
kingannoy VIRON7 years ago
Now thát would be a fun project!
I hate those kinds of people!
hello. i loved your videos man! i have the same taste and i used to wonder , would there be any one of this sort.. strengthening the remote signal is the easiest and can be implemented.
Yhep! those are the type I am trying to remove from nieghbor hood right now,need something safe yet annoying ,know what I mean?
How do you type in superscript and subscript?
do you use html?
badrang4 Kipkay7 years ago
I hear ya budy
Fortunately, what you say is incorrect. This will not, as you claim, "screw up" any television sets. Please delete your comment as it provides misinformation and is highly misleading.
I can't see regular, steady pulses of near IR light doing any damage to a TV, even if he's using three whole LEDs
I agree if this damaged a TV I'd be very surprised. Also if this was harmful wouldn't having more than one IR device in your living room be just as harmful to your TV.
sahmeepee mtxe7 years ago
Only if you cross the streams. That would be bad.
mtxe sahmeepee7 years ago
Yes a total protonic reversal.
Only remote (pun not intended) possibility I see is if steady (or perhaps "dirty", discontinued by being on the edge of useful range or performing flaky because of cold solder points) stream was misinterpreted by TV as some unlisted service command which tweaks some important setting. To many "ifs" in there, though. Besides, even if it was possible, TV repair service would be able to restore it and no material damage would ensue.
agishero2 years ago
why do we need 2 leds, why cant just 1 led be fine??
Plz answer soon kipkay.
more projects visit
hbhb3 years ago
1-these circuit design is something really stupid becuse your Power supply is 9v and diode's turn on in 1v together "two diode" they need 2v so that means voltage applied on output of 555 timer!!!

2-after that the collector current is 1 mA "check whit multimeter or data sheet" and it's not enough for turn on a infrared led it shod be 50 mA at least!!!

3-you shod apply voltage to only one pin of these circuit you apply voltage on both bass and emitter!!!

all these are wrong in electronic theories so....

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