Apple Display Connector Adapter Board
I picked up an Apple Cinema Display at a garage sale for a few bucks. I noted that it had no apparent power connection, but the cable terminated in what appeared to be a DVI connector. Once I got it home, I realized that wasn’t the case. Not only was the connector not DVI, but it was a proprietary connector type called the Apple Display Connector (ADC) that carried digital video data in DVI format along with USB and power. Apple used it on late G3 and G4 Macintosh computers with an ADC video card. Several companies made adapters that supplied power, but they are rare these days and often expensive, such as this Apple-branded one on Amazon.
I looked for several options and found this DIY ADC Adapter article on Tony’s Look, It’s Another Blog. He hand-wired an adapter that worked, but I wanted to do it tidier and with a circuit board; also to improve my skills. Alex also wired a circuit board that he sells on BatchPCB, but in a related Instructable, he notes that he updated to version 1.1 to correct a wiring bug, yet the BatchPCB board appears to say “1.0″ on it (I tried contacting him but without success.) In addition, his version did not include VGA which I wanted to add, and I wanted an Altoids-tin ready board.