I’ve seen an Apple iPad Dock connector to VGA Adapter to connect to a monitor or projector, and MaxiVista allows the iPad to become a second monitor. It is very similar to the iDisplay.

I’m not certain what you want to use this secondary monitor for, but you can use your home Wi-Fi network for extending your Windows desktop to your favorite Apple portable device. You might want to get a low-budget stand for your iPad, though.

It costs about $9.99, but the required Windows utility is free.

Source

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