Originally Posted by SpeedyHTPC
Need to know how much ma the sensor bar needs. If too little, then you get nothing. I think some had too little amp and it didnt power up.
The sensor bar draws 85mA, and runs from the 12V rail in the Wii via a 50 ohm resistor. Therefore you could perfectly emulate the Wii supply to the sensor bar with any 12V DC supply with a 50 ohm resistor. The redish coloured wire in the sensor bar cable is positive, the copper coloured one is negative. The resistor could be in either wire, it's not important.
I've extended my sensor bar, cut the wire and spliced a telephone cable in the middle. This way I can run the sensor bar over the CAT5 run that goes from my hall cupboard (where the Wii and my media PC is) to the front of the lounge where the screen is.
Rayman complains about sitting too far from the screen (sensor bar) when I'm 3m back on the couch... so I've now built my own sensor bar, of sorts. I've mounted two groups of three standard IR LEDs in my alloy projection screen frame. The groups are 400mm apart (1.5ich times the length of the standard sensor bar) and the three LEDs are 10mm apart. The frame is black, the LEDs are black, as are their bezels so they are almost invisible. I can now play Rayman from my couch perfectly. The only issue is that I have to be fairly centred on the couch relative to the screen because the LEDs are quite narrow beamed. I've ordered some wider beam LEDs from Radio Spares which should be here next week.
As I said above the sensor bar is driven from the +12VA rail in the Wii. There is a 50 ohm series resistor in the Wii to protect it from any shorts or other stupidity. I did the sums and calculated that a 100 ohm resistor in series with three LEDs (in series) puts the right current (40-50mA) through the LEDs to get good output. So there's a 100 ohm resistor for each group of 3 LEDs in my replacement sensor bar.
Originally Posted by stromm
I have a 55" HD RPTV. I got the Wii last Thursday. I can't imagine trying to play it with a front projector system. Most of the time I'm standing up in front of the image and I would think that my body would "shadow" the projection..
I don't have a problem standing 3.5m from my screen playing tennis with my front projector mounted on the ceiling about 4m from the screen. It's awesome.