OLPC XO 1.75 replace one of the 3 usb port with a mini hdmi

John Watlington wad at laptop.org
Thu Jan 20 06:48:05 EST 2011


On Jan 19, 2011, at 6:48 AM, Andrew Puch wrote:

> Is the cost and form factor viable to replace one of the external usb
> ports with a mini hdmi Type C or D port ? 
> 
> When students or teacher give talks it would be nice for them to show to
> the class on the tv what they are doing.
> 
> The type hdmi 1.4 , D connector is 2.8 mm × 6.4 mm, where as the hdmi
> 1.3 type C connector is 2.42 mm × 10.42 mm; for comparison, a micro-USB
> connector is 2.94 mm × 7.8 mm and usb a is 11.5 mm × 4.5 mm.
> 
> http://en.wikipedia.org/wiki/HDMI#Connectors

Hmm.   Most of the schools I've seen with XOs have no TVs, much less
one with HDMI input.

The HDMI pins aren't reused for anything, so this IS theoretically possible.
We didn't budget for HDMI power, however.    We'll think about it.

wad



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