I may end up using the 7300 for now until someone comes up with a
board for the TTL converter or a direct plugin for the LCD/Keyboard. I
dont have much time to create designs for this.
If I stick with the 7300 my biggest problem now is to find a way to do
Audio. I need the speaker to be housed in the enclosure. Would you by
any chance know how I could perform this feat. Is a USB speaker
feasible? I just need to play some audio files.
Maybe when you make the daughterboard I will buy a couple off of you.
Thanks again,
--- In "Don W. Carr" <> wrote:
>
> The keyboard attaches to the LCD which has a little micro-controller to
> check for keystrokes and manage the screen. So, you send characters
over the
> serial port to write to the LCD, and when you hit a key, the
> micro-controller detects it and sends it over thej serial port.
Works quite
> well. The particular model I used, supports up to 55 keys (5 rows by 11
> columns), but I only used a 16 key keypad (4 rows x 4 columns), and
thus, 1
> of the row connections and 7 of the column connections were un-used.
But,
> then you just need a straight through cable to the TS7xxx board. In your
> case, the TS7400 only has TTL level serial ports, so you will need
to buy a
> chip to convert the levels if you did not already do so. There was
another
> thread about a chip you can use to do that.
>
> The great thing about this design is that the display can be a long ways
> away. With direct connected LCD and keypad, the distance is very
limited,
> you eat up a lot of DIO, and you have ugly ribbon cable connecting
> everything.
>
> I am going to buy a TS7400 soon and make my own daughter board with
level
> converters for the serial ports, signal conditioning for the DIO and
AI, and
> a zigbee chip. I just need to talk them into programming the FPGA for at
> least one high speed external counter.
>
> Let us know how it comes out. Don.
>
> On 11/16/06, sipnj <> wrote:
> >
> > Hi, thanks for the reply. How did you plug these in to the
board? Did
> > you have to use any hardware between them?
> >
> > Thanks again...
> >
> > --- In <ts-7000%40yahoogroups.com>, "Don
W. Carr"
> > <doncarr@> wrote:
> > >
> > > Since you will not have enough DIO, you should buy a serial LED
> > display with
> > > keypad controller.
> > >
> > > I used the Oribital Matrix 4x40 with serial controller and 4x4
> > keypad. There
> > > are other sizes.
> > >
> > > LK404-55 40 Character x 4 Line Serial Interface LCD $121.00
> > > MA-KPP4x4 Keypad - 4 x 4 Keys (connects to LCD) $15.00
> > >
> > > You should be able to drill a round hole and put a rubber grommet.
> > >
> > > Don.
> > >
> > > On 11/15/06, sipnj <jon.macaroni@> wrote:
> > > >
> > > > Sorry if I am asking too many questions. I like the 7400 WIFI
> > BOX but
> > > > I need to add a speaker, an alphanumeric LED display and a matrix
> > > > keypad as well as a couple of push buttons and status LEDs.
> > > >
> > > > What do I need to get in order to connect these items to the
board. I
> > > > know I will have to do some cuttin and rilling to the box. Would I
> > > > need a lot of electronics to connect these items?
> > > >
> > > > Is there a schematic somewhere I can vie how these could be
added? I
> > > > prefer as much plug in as possible.
> > > >
> > > > Any suggestions would be appreciated.
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Dr. Don W. Carr
> > > J. G. Montenegro 2258
> > > Guadalajara, Mexico
> > > +52-333-630-0704
> > > +52-333-836-4500 ext 2930
> > >
> >
> >
> >
>
>
>
> --
> Dr. Don W. Carr
> J. G. Montenegro 2258
> Guadalajara, Mexico
> +52-333-630-0704
> +52-333-836-4500 ext 2930
>
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