HB schematic:
http://www.hobby-boards.com/catalog/links/lcd2-r1/LCD%20Driver%20v3.0%20Schematic.pdf
The PIC driven LCD controller is caching button states until its read out -
at least it is written in the specifications. Although I have no idea how
it works in practice...
On Mon, Jan 7, 2013 at 8:22 PM, Thomas Parvais <[email protected]> wrote:
> Hello
>
> Thank you for the idea : bigger screen , no button . However I've many
> info to display . I could also do a kind of roll out
>
> Do you have the schematic for HB LCD ? Not existing anymore on his website
>
>
>
> Thomas
>
> Le 7 janv. 2013 à 18:59, p4trykx <[email protected]> a écrit :
>
> W dniu 07.01.2013 o 10:42 Thomas Parvais <[email protected]> pisze:
>
> Hello
>
> I think Hobby-board does not sell anymore 1-wire LCD.
>
> I'm also interrested by this small LCD to display different measurements
> on the 1-wire bus. buttons can be used, I think, to change displayed values.
>
> fully compatible with OWFS ? perl script can control the "user interface" ?
>
>
> The problem with buttons is that you have to constantly pool the state of
> them. If the LCD is the only device on bus that's not a problem but when
> you read temperature the bus is busy for about 2-3 seconds. You can have an
> endless loop and it works reasonably responsive.
>
> Maybe the better solution would be to buy a bigger 4x20 display.
>
> Hobby bords design LCD is fairly easy. I made a clone of it with a
> universal board.
>
> I only have a photo of an early version made on breadboard but there are
> just few extra components.
> https://dl.dropbox.com/u/96422972/DSC00906.JPG
>
>
> --
> p4trykx
>
>
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