[TI-H] Re: Speaker
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[TI-H] Re: Speaker
If you're smart, use a PIC16F628, it has built-in UART, and is cheaper than
a 16F84 while 100% pin-compatible
--peter-martijn
----- Original Message -----
From: "Tim Comport" <thetechplace@lycos.co.uk>
To: <ti-hardware@lists.ticalc.org>
Sent: Thursday, May 01, 2003 3:07 PM
Subject: [TI-H] Re: Speaker
> >From memory, Cullen began work on connecting a PS/2 keyboard
> to the calc long before TI even hinted of releasing an external
> keyboard (? I wonder ?). Anyway, I think this is a great idea and
> maybe very useful if you used a 'portable' keyboard; such
> as a stowaway or rollable keyboard. In fact, after reading of Cullen's
> efforts I began work on a version which made use of the 89's silent
> link capabilities (so that you wouldn't need any on-calc software);
> but since I bought a PPC I haven't really done any more work on this.
> I completed an 'expensive' prototype and had the intentions of
> converting
> my design to use a cheap PIC. You can see my progress on my site at
> thetechplace.cjb.net
> if you want the source for the BASIC Stamp e-mail me.
>
> Good luck with your efforts,
>
> Tim
>
>
> -----Original Message-----
> From: ti-hardware-bounce@lists.ticalc.org
> [mailto:ti-hardware-bounce@lists.ticalc.org] On Behalf Of Nick Peaden
> Sent: Tuesday, 29 April 2003 9:31 AM
> To: ti-hardware@lists.ticalc.org
> Subject: [TI-H] Re: Speaker
>
> OK just wondering. I had soldered one together and remember hearing that
> the
> speaker was purely inductive and not good for the link port, but I
> haven't
> had any troubles... BTW... has anyone read up on the TI-PS/2 Keyboard
> connection by michael vincent and Cullen Logan. Tech docs are at
> http://www.psikan.com
> ----- Original Message -----
> From: "Nivek" <nivek_ent@yahoo.com>
> To: <ti-hardware@lists.ticalc.org>
> Sent: Monday, April 28, 2003 6:44 PM
> Subject: [TI-H] Re: Speaker
>
>
> > i used to make and sell speakers for TI calcs, what i did was bought a
> > 3.4mm? (whatever size the plug is on the link cables) from Radio Shack
> > and connected them to a Piezo buzzer, i didn't have any problems.
> hope
> > this helps
> >
> > Kevin
> > --- Nick Peaden <Nitrocloud@earthlink.net> wrote:
> > > I've heard that using a small broken headphone for a calc speaker
> > > (I'm on 89) would cause damage to the link port due to purely
> > > inductive loads. Is this true? Is a piezo buzzer better? Should I
> > > make a TI-89 TSR program driver for the PS/2 keyboard connection
> that
> > > Cullen Logan and Michael Vincent have made? Why haven't I heard much
> > > from this list?
> >
> >
> > =====
> > Nivek_ent@yahoo.com
> > Track where your money goes! See Where It's Been!
> http://www.WheresGeorge.com
> >
> > __________________________________
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>
>
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