[Gta04-owner] [ANN] GTA04 Keyboard prototyp

[Eric André]

----- Message d'origine -----
De: gta04-owner-request at goldelico.com
Date: Mon, 14 May 2012 12:00:06 +0200
Sujet: Gta04-owner Digest, Vol 17, Issue 14
À: gta04-owner at goldelico.com

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>Today's Topics:
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>   1. Re: [ANN] GTA04 Keyboard prototype (Denis Shulyaka)
>   2. Re: [ANN] GTA04 Keyboard prototype (Christoph Mair)
>   3. Re: [ANN] GTA04 Keyboard prototype (Dr. H. Nikolaus Schaller)
>
>
>----------------------------------------------------------------------
>
>Having a 3x4 array of capacitive "buttons" on the back side is
>sufficient for typing (just like we do on a feature-phone - we don't
>even need to learn the layout) and can even be performed using one
>hand. The PCB can be more thin and we don't need any sliding
>mechanism. MPR121 uses I2C 3.3v interface which I guess we've got.

I Would'nt use a capacitive as this surface is allways touched. 
The machine will allways confuse between manipulation and information (typing).
Inmy humble opinion.
Best regards
Eric