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I'm planning on making a jig to hold and charge an iPad. Specifically, it will hold it in the landscape orientation, and charge it via the smart connector. Where can I find the electrical specification for the smart connector?The specific questions I'm trying to answer are:What voltage(s) and current(s) do I need to provide? (Secondarily, does it negotiate for higher currents like the USB standard?)What is the communication interface? As it's only 3 pins total, I'm thinking it's either a bidirectional communication via 1 pin, or it's modulated somehow to reuse pins. What is the required magnetic setup (polarities, strengths) to align the iPad to the Smart Connector?