[Wear-Hard] Heavy MyVu Crystal Modifications

[Brian Kuriyama]

Alright, so for the sake of knowledge and proving somebody wrong, I set out
and proved myself wrong... To an extent...

This is the decoder used in the MyVu pendant:
http://www.datasheet4u.com/html/T/W/9/TW9910_Techwell.pdf.html

Bad news:
-Package is LQFP
-Registers need to be modified to accept S-Video instead of composite.
-Our own microcontroller would need to be added to the pendant (if you could
find any room) to write to the registers

Good news:
-S-Video is definitely supported
-Traces to the serial communication lines are exposed
-Someone hardcore enough could possibly succeed with this modification.

I personally think that this would be way too much effort since registers
got involved and it wasn't a simple pin mod. The quality from composite
looks pretty decent for the display as is, and I think that going for a
marginal increase in quality with S-Video through this mod is not worth the
effort, but you can decide that on your own when you get your headset.


On Sun, Jun 14, 2009 at 10:02 AM, Olli Markkanen
<olli.markkanen at gmail.com>wrote:

> 2009/6/14 Brian Kuriyama <yosh.five7 at gmail.com>
>
>> It's definitely the same chip, but the chip's package is BGA as described
>> in diagram 12.2. While supporting dvi may not be an issue, wiring it up to
>> the myvu board is impossible. You would have to transplant the chip, which
>> would require very expensive equipment and someone with a lot of expertise
>> in the art of doing so.
>>
>> Also, that "decoder" it mentions in the diagram probably refers to one of
>> the philips decoders it mentions on page 5
>>
>
> Ok, so it looks like no dvi for me then. I'd still disagree on that
> s-video, because that page 10 pic clearly states that the s-video and
> composite wires both use the same decoder, so if it can eat composite, why
> not s-video then?
>
> >Olli,
> >Glad to see you posting on the list! If you're really that close to
> >building a wearable, come here for support and cheering!
> >
> >I'd also love a wearable IRC channel, but never found one. It seems
> >the folks into wearables like mailing lists and asynchronous
> >communication. I've been told that freenode#linuxice has some wearable
> >folks who come in frequently (source: Wirelessdreamer of joy2chord).
> >If you'd like to start a channel on Freenode or any other server I
> >will be a frequent user."
>
> Yeah, I'm so going to build it this summer.
>
> I'm not going to start the channel, at least not yet. I don't use IRC lot
> yet, that will change
> if the wearable works well enough. I'm newbie with it, so I'd just ban
> myself or something.
>
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>
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