Introduction: Wii Wire Less Sensor Bar Under $10!

Picture of Wii Wire Less Sensor Bar Under $10!

Dont you hate when you use a projecter for your wii and have to strech the sensor bar wire to the projection screen? Now you can make your own wire less one for under $10!

Step 1: Part 1

Picture of Part 1

to make this you'll need just a trip to your nearest radioshack or other electronic store!

1x 2 AAA battery holder

2x high output infrared led

1x switch

some wire





soldering iron

Step 2: Put Evrything Together

Picture of Put Evrything Together

put everything together like this

Step 3: Tape Card Board on the Top and Bottom to Hide the Wires

Picture of Tape Card Board on the Top and Bottom to Hide the Wires

tape card board on the top and bottom to hide the wires


nodoubtman (author)2012-03-03

No transistor to amplify the IR LED? this cannot work
good effort!

tomtortoise (author)nodoubtman2012-06-11

You o know a transistor amplifies signal, the sensor bar isn't a signal, it just used the LED's as a reference for the wiimote to orient it with the screen, thus, no transistors needed

scotty3785 (author)2008-08-08

Resistor? Is it on holiday?

meeboy (author)scotty37852008-08-08

you dont neeed one if your using 2 AAA

flyingpumpkin (author)meeboy2010-01-08

You need one 4.7-ohm resistor for a series of 4 1.28V 100mA radioshack high intensity IR LEDS

find out how to calculate it here:

 A LED is NOT a resistor it is a DIODE.  that means if the voltage fluctuates the current and resistance can be nearly anything.  It will eventually FRY.

Current Limiting Resistors are ALWAYS necessary with an LED.  sure it will work for a few days - until there is a power fluctuation and then you fry one of your LEDs, and that causes the voltage to increase across all of them and then fry the next one... and the next one...  just like christmas lights.  IT's called THERMAL RUNAWAY. 

Unless you want to turn your LED (Light Emitting Diode) into a SED (Smoke Emitting Diode) or friode, just stick a resistor on the front end of the circuit.

There is a very nice explanation here:

and some LED basics here:

mrwolfe (author)flyingpumpkin2011-05-15

Not necessarily. What isn't stated in the above links is that all diodes (LED's included) have what's known as Bulk Resistance as well as forward voltage.

In the case of a silicon diode, the bulk resistance is small and decreases with curent, and the forward voltage drop is about 0.6v. Put 1.5v directly across a silicon diode and you'll have blue smoke in a matter of milliseconds. This is because, even though the diode forward voltage acts to reduce the effective voltage across the diode, the bulk resistance is so small that the remaining 0.9v or so causes LOTS of current to flow (Look up Ohms Law).

LED's aren't made of silicon. They're made of exotic compounds such as Gallium Aluminium Arsenide (GaAlAs), and Gallium Indium Phosphate, so their bulk resistances and forward voltages are much higher than for Silicon. It is possble to use a LED without a current limiting resistor IF the bulk resistance and forward voltage drop are high enough. Break open any cheap LED torch keyring and you will probably find just a LED - no resistor.

That all said, I wouldn't advocate using a plugpack to drive a LED without a resistor. This is because most cheap plugpacks only give you their rated voltage at the rated current.  At lower loads, they put out much higher voltages. Check a 5v plugpack without any load on it and you'll most likely see 9v or so.

If you want to try running a diode directly from a battery it should work as long as you have the right diode. This is because the battery voltage doesn't change much under load. In the spirit of these forums, experiment! After all, the worst you can do is turn a 50c diode into blue smoke!

hondaman900 (author)2011-04-20

There's a more developed version of this on Kickstarter
Seems to be a more complete system. I like their father-son kit idea.

account3r2 (author)2010-12-27

the real sensor bar has 10 IR leds

nbagf (author)2010-04-06

 you can use my immage if you want instead of your ugly on (no offense).

X4X4X4X4 (author)2009-06-15

The IR leds are at 1.5v, each. One battery provides 1.5v, so no need for a resistor.

flyingpumpkin (author)X4X4X4X42010-01-08

You always need a resistor with an LED....

LEDs require a current limiting resistor, so that the current doesn't fluctuate eventually frying your led after long term use.

breakz (author)2008-09-01

Hey!! u need a resistor in series otherwise u'll burn out ur L.E.Ds...around 47ohms or sumthin should be ok..

Lance Mt. (author)breakz2009-11-03

 No, he doesn't. Fro mthe looks of things he's using a simple 1.5v IR powered by a AA, being 1.5v itself

Lance Mt. (author)2009-11-03

 Ok, i'd like to clear things up on how this works. 

The wii-mote is a Infer Red (IR) camera which tracks distance to the TV via the LED's he has. They are IR LED's set up at the same distance from each other as the Nintendo sensor bar. 

All he has done is given its own power supply. The only reason you need to plug it into the wii is because of power.

I like this, but I've built mine into my TV case mod. Useful that. 

To Meeboy, I'd suggest adding this somewhere in your instructions please. Or at least change the wording. Add it as another step so people at least understand why they're doing this. 

 -Cheers, Chris

lil Smart Kunt (author)2008-08-09

Dude my brother is only 4 years old and he draw and write better then you no affence though...

pmn9393 (author)lil Smart Kunt2009-08-19

He probably doesn't speak proper english though, just like you.

meeboy (author)lil Smart Kunt2008-08-09

i didnt have time and was using ms paint

ReCreate (author)meeboy2009-01-11

you know that you can like draw text into an image in ms paint ...right its that big A in the toolbar

lolcat360 (author)lil Smart Kunt2008-12-30

look who's talking!

awang8 (author)lil Smart Kunt2008-10-16

He was in a hurry and probably didn't have a posh tablet. Can your brother draw on a computer?

junior640661 (author)2009-04-06

instead of using a separate switch y dont you buy a AAA battery holder with a built in switch which is ready for wiring and buy resistors

Crypto (author)2008-12-26

Also, can you detail exactly how far apart the two LEDs should be placed? It makes a difference (albeit it can be slight), as the wiimote location in space is determined by its relationship to the two LEDs...and that algorithim is written assuming the LEDs are a set distance apart. If you added that and followed the advice given in an earlier comment, this could be an extremely nice instructable, and a real money saver for some.

twist2b (author)2008-10-03

I love the idea. But an official wireless bar is $25. SO your only saving about 15. BUT, if you could update this instructable I would suggest: 1. add a resistor, your hurting mr. led :'( 2. get some more pictures (that are more clear aswell) 3. explain how it works with the wii 4. use a small box or something to make it look nicer. Cardboard is really sketchy/gehto. Overall though that was really amazing idea. Keep up the work man!

Darkshot (author)2008-08-11

MACRO IS GOOD TOO *nods head*

rakol1 (author)2008-08-06

or use a candle lol

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