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External keyboard power usage

25th April 2014, 08:51 AM |#1  
OP Senior Member
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Join Date:Joined: Apr 2013
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through Y cable with charger plugged in, will this keyborad be charged from tablet or charger, or maybe charger is obsolete and keybord will drain battery anyway?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, 04:33 AM |#2  
Junior Member
Thanks Meter: 14
26 posts
Join Date:Joined: Oct 2010
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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