Lightbar Schematics

As you can see on the schematics, the LEDs get fed 12V through a 300ohm resistor. There are fuses on both pin connectors; I don't know what amperage they are rated for. The source pin of the PWM is pin C5 on the CPU (not 100% sure on the numbering). So, the lightbar is entirely controlled by software (it seems). This means that we might be able to do PulseVU directly from software if we ever get homebrew going on the Wii.

If you want the LEDs to be constantly on, you can just connect TP52 to ground, note though that you will loose the protection of the fuse on that side (shouldn't be a problem).

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