Engineer-Joe posted:...If they draw 5ma and G posted a limit of three MTH LEDs per circuit, function, channel, whatever?
I have to guess that the MTH LEDs draw 20ma X3 max =60ma / 5= 12 per channel max?? Maybe 10 for safety?
Is this limit something that MTH sent out in some kind of service-bulletin? I think it's important to establish the actual capabilities of the PS3 lighting circuits since that's apparently how you're going to be driving these micro-LEDs.
AFAIK the PS3 LED outputs are "programmed" within the soundset on an engine-by-engine basis. That's how you get that EVO chasing pattern if you load an EVO soundset. Thus, the soundset also controls the brightness on a per-output basis since, as you point out, you do not see resistors in the wiring of the PS3 LEDs. I think there needs to be a parallel effort to understand the PS3 lighting output capabilities. For example, one can reasonably speculate that the output driving the Headlight LED might be driven "harder" than another output which drives a relatively dimmer indicator like, say, a number board or whatever.
As I recall, for PS2 (6V bulbs) there were occasional discussions about co-opting unused lighting outputs. There too, the "trick" was to find a soundset that had the programming to properly drive the unused (i.e., unused in the stock engine) wire.
