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External keyboard power usage

257 posts
Thanks Meter: 3
By blackfire74, Senior Member on 25th April 2014, 09:51 AM
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Recently I bought an "Y" OTG cable which has additional charger input. I own a Samsung Galaxy Note 8.0 tablet, and unfortunately it doesn't charge through this cable. Anyway, asking teoretically, if I connect external keyboard through Y cable with charger plugged in, will this keyborad be charged from tablet or charger, or maybe charger is obsolete and keybord will drain battery anyway?
28th April 2014, 05:33 AM |#2  
Thanks Meter: 17
you need a kernel with usb otg + charge support. And a cable that emulates a multimedia / audio dock.

I made one of this cable, with a 65K resistor and works great.

Take a look at and at
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