Lets say Ive got this crazy idea into my head to run two LCD screens off one Powerbook – both spliced from the same feed on the motherboard. How might I go about doing that?
Once again it’s Eudi and Dr. Bob to the rescue: Mirroring two LCDs off a powerbook motherboard is technically an edge case which I don’t believe I’ve seen before… Anyway. In theory, if you had two *identical in every respect* LCDs, you could probably construct buffer circuitry to mirror the same input signal on both of them. The signals you’d have to replicate are low voltage, low power, and extremely timing-critical, so it wouldn’t be easy, and it would probably involve parts not available at Radio Shack. If the LCDs you have differ *at all* in the timings they’ll accept, then it also won’t work. LCD controllers have to be programmed to deal with the idiosyncracies of a given panel, which is why you can’t easily just willy-nilly swap screens between laptop motherboards, and why those controller boards you buy seperately to work with eBay LCD panels are so expensive. You would also have to provide an EDID code that would work for both displays to the host controller.
