Wireless Wii sensor bar

[Lee]

http://forums.somethingawful.com/showthread.php?s=&threadid=2188696&highlight=wii+sensor

 

[Tom]

Any source of IR light does the trick.

 

[KDF]

^^ yep seen that a while back.. personally I think the sensor bar that comes with it does a better job and is less likely to burn your house down