hi there mate, the sensor bar dosent need to be plugged into the wii, it only draws power from it, it works by having 4 ir leds on either side that the wiimote can see and then it triangulates its position off them, use your mobile phone camera and point to it while its plugged in to see the lights! it does not need to be plugged into the wii at all just for power, heres how i got roundit!
For those Wii owners with abnormally large living rooms, projector TV setups, or a particular penchant for tricking out their console just 'cause, take heed. Without the need for candles, IR hacks, PCBs, soldering, or even (visibly) voiding your warranty, you to can hack that Wii sensor bar to make it wireless for $8 (or less). Simply head to Radio Shack and snag:
1. Five-pack of 9V battery snap connectors (~$2, part #270-325)
2. Twenty four-pack (single pack) of 22-26 gauge wire butt connectors (part #64-3073)
3. 9V battery
Now just strip your 9V battery connector wires, crimp those to the power pins of your Sensor bar with the butt connectors (battery red to Wii red, battery black to Wii orange). We have no idea how long it'll last -- nor do we make guarantees that it'll work or won't fry your bar -- but peep AVS for some more details on this and other Wii hacks.
or theres this way
The Homemade Wireless Wii Sensor Bar!
From the moment I picked up my Nintendo Wii last Sunday morning, I've been very curious about the design and functionality of the Wiimote and its sensor bar. Of course, I'm not the only one. Through a few links on sites like digg, it has come to other people's attention that the Wii sensor bar both only consists of IR LEDs and also sends no signal between the Wii and the bar... only power.
This had me thinking. It my apartment in Boston, I have a projector, but I feared hooking my Wii up to it because of the length I'd need to have in the cable to put the bar right under the image. Then, I thought, maybe I can make one.
So, I did.
With just a perf board, some wires, a bit of soldering, 4 AA batteries, and 4 IR LEDs, I was able to make this:
Yes, it's ugly. Yes, it's ghetto. But, it is a wireless, battery-powered Wii Sensor Bar. And it works.
First, I measured the distance between the middle of the left set of LEDs on the Nintendo sensor bar to the middle of the right set. That came out to be 7 1/2 inches. It wasn't a perfect measurement, but since the Wiimote triangulates the distance, it's accurate enough. Soldering wire from the positive side of the battery holder to a switch, the switch to the positive end of one of the IR LEDs, then to the next, to the next, to the next, and then back to the battery terminal, it was easily completed.
Placing the IR LEDs.
Soldering some wires together!
Placed on top of my TV showed that it was a success... the Mii plaza, the Wii menus, Wii sports, and Zelda all worked and moved just as well as it had with Nintendo's stock sensor bar. There is no need for a wireless transmitter or an extension cord. Just unplug Nintendo's stock bar, put your homebrew wireless Wii sensor bar in place, and you're good to go.