TV Remote Jammer!
4 Steps
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...

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.
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ewilhelm says: Apr 1, 2008. 9:37 AM
thepaul1993 says: Aug 29, 2008. 6:43 AM
cool
agishero says: Mar 13, 2013. 11:35 PM
why do we need 2 leds, why cant just 1 led be fine??
shashankgutha says: Aug 12, 2012. 2:45 AM
more projects visit
http://www.excellentminds.in
hbhb says: Mar 30, 2012. 1:30 PM
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 transistor...in these circuit you apply voltage on both bass and emitter!!!

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

MaknItHappen says: Jul 21, 2012. 4:55 PM
Spell Check?
Higgs Boson says: Apr 17, 2012. 7:09 PM
This is awesome. But my sister figured out what I was doing, and would not let me continue to hold the remote up. I am going to try and add more infrared LEDs so that it doesn't need to be aimed as precisely and looks less suspicious.
ILOVEPONIES!!!!! says: Mar 25, 2012. 8:20 PM
Kip you forgot the 180ohm resistor in the "What you need" section
hbhb says: Mar 28, 2012. 1:50 PM
when some one say's " i use pcb " that means 180ohm resistor cant be forgotten?!
h b says: Feb 24, 2012. 4:50 AM
hi
i build these circuit whit pcb and it dosen't work!
when you push a button on tv remote you can see LED's light whit mobile camera on top of the tv remote... it show's that LED work ...but in these circuit not?!
sneitzke38 says: Aug 29, 2011. 10:34 PM
What 555 chips could I use I am using the 555CN (from radio shack) and my circuit is not working I have it on breadboard right now and am not sure what isn't working

Thanks.
planetroverrobo says: Nov 13, 2011. 4:48 PM
I have it on a breadboard to with a 555CN and is not working etheir. Did you get your fixed and if you did can you tell me how you did yours?
highvoltageguy says: Oct 4, 2011. 8:29 AM
if you like epoxy then use loctite epoxy works like magic
markee2 says: Sep 14, 2011. 11:34 PM
got similar circuit schematic but fewer parts. dont know if this one works or not. Or which one is better..   circuit copied from
http://www.simple-electronics.com/2011/09/tv-remote-jammer.html

cdousley says: Jan 16, 2010. 8:54 AM
could i use a diffrent tranistor i cant get this one
robot1398 says: Aug 18, 2011. 8:35 PM
yes, but it should be PNP
PoisonMondo says: Jan 23, 2010. 1:34 AM
can you use a different pot value cause a 10k \$9.00 here
robot1398 says: Aug 18, 2011. 8:34 PM
only 10 inr in india
hyudryu says: Apr 7, 2010. 6:26 PM
It only costs around 2\$ at my store. They sell a LOT of stuff.
http://www.halted.com/commerce/catalog/spcategory.jsp;jsessionid=BD906DB46CE24400663B07230F9C0CA2?category_id=1122&czuid=1270689974389
I go there physically. Its located near my house so i dont have to pay shipping
roy1931 says: Jul 7, 2011. 5:25 AM
"We've been jammed sir!"
"Raspberry!..."
SPACEBALLS!!!!
mwagner63 says: Jul 27, 2011. 10:07 AM
Only one man would dare give me the raspberry! LONESTAR!!!!!!!
shalu38 says: Jun 30, 2011. 5:52 AM
can anyone plz specify abt the sign of the capacitor
AgentClank says: Jun 18, 2011. 12:24 PM
where does the 9v negative connect to? and why is there a GND at the bottom?
bkaspersky says: May 1, 2011. 8:12 AM
would these work? http://www.cricklewoodelectronics.com/Cricklewood/product.php?productid=20865&cat=0&page=1
bkaspersky says: May 1, 2011. 1:37 PM
help?
B.F.L.M says: Jun 3, 2009. 4:15 PM
How do yo adjust the frequency??????
tledgerwood says: Apr 24, 2011. 10:49 PM
luudvig says: Apr 7, 2010. 3:11 PM

how could I get a longer range? the one I've built only works when I bring it close to the tv..

tledgerwood says: Apr 24, 2011. 10:27 PM
you can use tin foil to make a "reflector". Just place behind the LEDs in a three- wall configureation (or a U) and it should up the range if you point it at the set and remove any obstructing materials can't do too much harm. be careful not to short the LEDs out and g-luck!
Arcagelinos says: Apr 2, 2011. 3:46 AM
The other remote controls IR leds make a stronger signal at that the ones on this circuit
hyudryu says: Apr 7, 2010. 6:27 PM
Use HIGH powered IR leds or use IR leds and IR laser of low power
Arcagelinos says: Apr 2, 2011. 3:44 AM
Kipkay you forgot to put on the resistors the 180ohm resistor
though everyone should realize it from the 4 resistors.
Really nice prank BTW. ty
hyudryu says: Apr 7, 2010. 7:32 PM
Too bad i dont have a oscilloscope Or i would know if it works. I tried it with a visible LED and it just turns on. I will try using a speaker and see what i get later...
Arcagelinos says: Apr 2, 2011. 3:28 AM
It just turns on because our eyes cant see its flicker.
Bruno153 says: Mar 14, 2011. 1:37 PM
There's a video from Howcast showing how to make this same project.... i wonder why....
Airsoft 007 Sniper says: Dec 21, 2010. 3:36 PM
yo kipkay ive watch loads of your videos but this one is not always a good idea my tv and im sure plenty others have buttons on the front
matstermind says: Sep 27, 2010. 6:16 PM
lasertag use?
ASCAS says: May 27, 2010. 6:56 AM
Hi ! I like your projects and makemagazine.

I tried the project and it's great !!!!!!     :)
But I was wondering why not just add a switch on the remote's IR LEDs in series instead of making a jammer circuit that would take some time.
matstermind says: Sep 27, 2010. 6:16 PM
because a jammer has many other uses too
Paladinsfo says: Mar 21, 2010. 9:12 AM
Oh NUTS! dunno worry about ones and zeros or weird pot adjustments...just wire up and exclusive OR/Modulo two adder and a shift register to get a pseudo random sequence going...three chips will five over 8 million 388 thousand possible combination's for someone to look at.
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