[Blabber] [spam] Tiny Talker pilot kits - at cost

Ananda ananda.das at gmail.com
Fri Nov 4 00:27:55 EDT 2011


sweet. Thanks for the details. Sounds awesome. count me in for two.

On Fri, Nov 4, 2011 at 12:05 AM, Chris Stratton <cs07024 at gmail.com> wrote:

> On Nov 3, 2011 8:13 PM, "Ananda" <ananda.das at gmail.com> wrote:
>
>> Hi, I was wondering, is there an amp and where does it store the audio?
>>
>
> There is a small speaker and a TPA701D amplifier which should provide
> about 200 mW on 3 volts provided by two AAA cells.  The idea is that it
> spends most of its time in microampere sleep mode and then wakes up in
> response to the tilt switch, says something, and goes back to sleep
> (perhaps after a short delay during which it might be more interactive).
> The amp & speaker are loud enough to surprise people in spaces where they
> aren't expecting to hear something, but an outboard amp (and probably more
> filtering) would be required for public spaces.
>
> Storage is a 4 megabyte (32 MBit) spi flash from microchip.  I usually run
> 16 KHz 8-bit mono audio, so that provides 250 seconds of clips.  Firmware
> is in its infancy, but it should eventually be able to handle an arbitrary
> number of clips.   One thing I'd like to try is to record numbers
> separately and make something which can string them together to announce
> sensor readings.  I haven't pursued it yet, but a quick look at the
> attiny85 data sheet seems to indicate that pin 2 - the one that is entirely
> unused and so available for expansion - has an ADC.
>
> Unfortunately I'm way behind on the documentation effort - I've been
> trying to get this and a second project in the production queue since
> there's a two week lead time on the boards, and then go back and fill in
> some of the blanks while waiting for them.  I do apologize that what it is
> / what it does is still rather unspecified at the moment - hopefully that
> will be fleshed out soon.  I'll hopefully be ordering real production
> quantities before long and plan to keep having a substantial discount for
> Hack Manhattan people.  Maybe someday we'll be able to do our own group PCB
> orders and shave at least a few days off the time, since right now the
> boards have to go first to the guy in Oregon who puts the batch together to
> be broken up, and then be re-shipped to all of use utilizing his service.
>
> Chris
>
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