[Gta04-owner] 3D printed GTA04 case

[NeilBrown]

On Tue, 3 Jan 2012 09:44:23 +0100 Boudewijn <wankelwankel at yahoo.com> wrote:

> On a sidenote, whether in wood or in other materials, I thought of adding 
> contact points for recharching in other ways than USB. Actually that would be 
> to use it as VoIP handset, in a similar manner as DECT phones in a cradle. 
> Obviously it is to be connected to TPS65950, but I do not really see where to 
> connect it exactly. According to USB-OTG on page 81 of [2], 5V is connected to 
> VBUS/R8, but I can't find that on OMAP power (p79) or Clock and Charger (p78, 
> where I see POWER in the middle of the diagram at pins 7/8, connected to 
> VAC/N5). Is it safe just to wire 5V to the USB-OTG connector and have recharge 
> pads at the bottom of the case? 

The correct place to connect external power would be VAC.
It should be at least 400mV more than the battery and less than 7V.
so 5V or 6V would be fine.

Probably best to attach it at pins 7/8 of the connected that the serial cable
goes in to.

You probably could just connect 5V to the USB port as that is all a USB
charger would do, but I think it would be better to use VAC if you can.

NeilBrown



> 
> 
> Boudewijn
> 
> [1] http://www.eos.info/en/products/materials/materials-for-plastic-
> systems/pa-22002201.html
> [2] http://projects.goldelico.com/p/gta04-main/downloads/37/get/

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