This is why you need a powered USB hub when using the older CCK to connect multiple USB devices to your iPad or iPhone. It's actually something I get asked about a lot. Hopefully this thorough video will explain it clearly. I even had to get myself a tool for measuring USB power current, just for this video. Yes, we're doing science too! There's nothing more anti-climatic than getting one of those " Accessory Unavailable " pop-ups when trying to be productive on iOS, yet it's something we have to deal with quite often. Then there's the " Accessory may not be supported " one too. So I am also going over the most common dongle connection error cases and I am also explaining why I recommend using the Apple Lightning to USB 3 adapter, over the Camera Connection Kit aka CCK.
ADAFRUIT CHARGER DOCTOR (SWEDEN)► https://www.kjell.com/se/sortiment/dator-natverk/kablar-adaptrar/usb/usb-adaptrar/adafruit-usb-multimeter-p88300
APPLE CCK (Lightning) ► http://www.apple.com/shop/product/MD821AM/A/lightning-to-usb-camera-adapter
LIGHTNING TO USB 3 ► http://www.apple.com/shop/product/MK0W2AM/A/lightning-to-usb-3-camera-adapter
PLEXGEAR USB HUB (SWEDEN) ► https://www.kjell.com/se/sortiment/dator-natverk/datortillbehor/usb-tillbehor/usb-hubbar/plexgear-portable-300-usb-hubb-4-vags-p69259
IKM iRig Pads ► http://www.ikmultimedia.com/products/irigpads/
BEHRINGER UCA-202 ► http://www.music-group.com/Categories/Behringer/Computer-Audio/Audio-Interfaces/UCA202/p/P0484
NOVATION AUDIOHUB 2x4(not used) ► DISCONTINUED PRODUCT
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