Just the heads up, I got one of those Adjustable Output DC Converter Step Up for aliexpress, and it works.
kept the original wii port, opened the sensorbar, soldered a 2 wire cable to + and gnd spot on the pcb, once plugged in, I put a multimeter on vcc and gnd on the wii sensor bar pcb, then slowly turned the screw until I got 7.25V (remove your screwdriver to check the real voltage, because you and the screwdriver add an offset of like 7mV)
why 7.25V ? this is the value I got from the same spot with the wii sensor bar plugged in via the wii sensor port, so just gotta match that.
Current draw is like 430-450mA on the usb(3) port.
gotta admit, I forgot to try to hook it up the usb plug to a wii or wiiu to try if it worked...
only drawback is if I plug both the usb (pc) and wii sensor bar plug (wii/wiiu), I'll probably just fry the leds lol.
There isn't a single Sensor Bar to USB adapter? Because if there was, you don't need to go through this hardmodding stuff.
I personally have no idea where to get a wii sensor bar port, to make an adapter, so maybe that's one issue. it's expansive to produce such a port, compared to the cost of 10leds and a usb port. (also it might be Nintendo proprietary)
(that being said, you can just buy this
https://www.aliexpress.com/store/pr...sensor-bar-extension/2925115_32828570875.html
cut the cord, get this
https://www.aliexpress.com/item/7W-...t-DC-Converter-Step-Up-Boost/32825148673.html, solder + and gnd to each other, and you're done, 5$ adapter
for a cleaner result you can always put it in a box
https://www.aliexpress.com/store/pr...n-control-box-switch/2658110_32758663445.html )
second issues is that you'll need more voltage than a usb1/2 cable can deliver on it's own to power the 10 leds in a sensor bar.
so you'll need a step up conveverter like I did, to do this right.
problem is, 3rd party manufacturing USB wii sensor bars want to maximize their profit, but can't power all 10leds on usb 5v without addind something more expansive than 10leds and a usb plus, so they just put 6leds or even less and hope for the best. (Nintendo put 10 for a reason lol)