[[basicstamps] Speaker Volume]
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Posts: 46,084
I have an LM386 that I plan to use. Also I can dig up some simple transistor
amps from some documents I have around here somewhere. I have 3 SN76477 Texas
Instruments Complex Sound Generators from circa 1978 that I plan to play with
again, and I recall a simple transistor amp was in that data sheet. [noparse]:)[/noparse]
"Allan Lane" <allan.lane@h...> wrote:
> I have a question for the group.
> I'd like to have my Stamp produce tones --
> which I know how to do, thank you,
> but I want it to do it with programmable
> volume, so it can get LOUD if I want
> it to.
>
> Ideally, it would also have a microphone
> so it could listen to itself, me (via a
> whistle), and other Stamps.
>
> What is the best approach? The Piezo
> approach seems limited in controllable
> volume -- maybe I'm missing something?
>
> The Speaker approach seems to take a lot
> of power, which isn't a problem if needed.
>
> I don't have a problem using transistors,
> op-amps, whatever to control the volume,
> I'm just looking for a start. And oh,
> yes, it should be small (3" square max) [noparse];)[/noparse]
>
>
>
>
>
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amps from some documents I have around here somewhere. I have 3 SN76477 Texas
Instruments Complex Sound Generators from circa 1978 that I plan to play with
again, and I recall a simple transistor amp was in that data sheet. [noparse]:)[/noparse]
"Allan Lane" <allan.lane@h...> wrote:
> I have a question for the group.
> I'd like to have my Stamp produce tones --
> which I know how to do, thank you,
> but I want it to do it with programmable
> volume, so it can get LOUD if I want
> it to.
>
> Ideally, it would also have a microphone
> so it could listen to itself, me (via a
> whistle), and other Stamps.
>
> What is the best approach? The Piezo
> approach seems limited in controllable
> volume -- maybe I'm missing something?
>
> The Speaker approach seems to take a lot
> of power, which isn't a problem if needed.
>
> I don't have a problem using transistors,
> op-amps, whatever to control the volume,
> I'm just looking for a start. And oh,
> yes, it should be small (3" square max) [noparse];)[/noparse]
>
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Comments
sounds you can get out of the Stamp pin. With a digital pot you could
probably even adjust the volume level too... I think you can even snag a
copy of their schematic out of their documentation.
Original Message
> I have an LM386 that I plan to use. Also I can dig up some simple
transistor
> amps from some documents I have around here somewhere. I have 3 SN76477
Texas
> Instruments Complex Sound Generators from circa 1978 that I plan to play
with
> again, and I recall a simple transistor amp was in that data sheet. [noparse]:)[/noparse]
> > I have a question for the group.
> > I'd like to have my Stamp produce tones --
> > which I know how to do, thank you,
> > but I want it to do it with programmable
> > volume, so it can get LOUD if I want
> > it to.
> >
> > Ideally, it would also have a microphone
> > so it could listen to itself, me (via a
> > whistle), and other Stamps.
> >
> > What is the best approach? The Piezo
> > approach seems limited in controllable
> > volume -- maybe I'm missing something?
> >
> > The Speaker approach seems to take a lot
> > of power, which isn't a problem if needed.
> >
> > I don't have a problem using transistors,
> > op-amps, whatever to control the volume,
> > I'm just looking for a start. And oh,
> > yes, it should be small (3" square max) [noparse];)[/noparse]