Originally Posted by Murukesh
What obvious reasons? Personal experience with three different sets of wireless mice+keyboard combos suggest different to me.
But if a step up transformer would do, then maybe a cell wouldn't be needed, right? A college kid could build one from components from his labs.
USB mouses consumption is lower than keyboards due the size of the circuits, usually keyboards uses a larger micro-controller, some of them with macro capability and other stuff even have external memory
Based on my actual and previews USB Keyboard and Mouse set, usually the keyboard consumes near to 500mA and the mouse near 120mA
for the step-up question, yes, if the phone spits out something trough the USB_VCC, a cell will not be needed. its cheap to built a step-up circuit, if the guy have a protoboard the sky is the limit! but i don't think he can do one as tiny like pololu does
the size of the circuit itself is ridiculous:
and its cheap, i ordered 2 to play a lil bit with it and see what i can do, but since i don't live in the US i don't know how long till it arrives.
Originally Posted by SSMI
Do we know if it outputs any kind of voltage right now? I would be willing to try the step us with some flash memory over the next few weeks but don't know what kinds of changes we would need to make in the kernel.
Sent from my Nexus 4 using Tapatalk 2
For what i was reading in this topic, some one said that the phone output on the USB_VCC is the same output of the battery, 3.7~3.8V
But that step-up booster works in a range starting from 0.8V to the max output (5V)