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'Need help in Digital Recorder'
2006\03\20@063524 by changhp

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Hi Friends:

I am making a DIgital Voice Recorder which can record sound and save the
audio files on a USB Flash Memory Drive. are there any one particular one
chip can simplely do all the job, or can you give me some suggestions on
which are the chips that I need to buy.


Thank you very much.

Charles
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2006\03\20@065445 by Michael Rigby-Jones

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>-----Original Message-----
>From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu]
>Sent: 20 March 2006 11:17
>To: piclistspamKILLspammit.edu
>Subject: Need help in Digital Recorder
>
>
>
>Hi Friends:
>
>I am making a DIgital Voice Recorder which can record sound
>and save the audio files on a USB Flash Memory Drive. are
>there any one particular one chip can simplely do all the job,
>or can you give me some suggestions on which are the chips
>that I need to buy.

Writing to a USB memory stick is not a trival task.  There is a new standard called USB On-The-Go which is designed to allow simpler access to slave USB devices such as memory sticks.  Google for "USB OTG" and have a look at http://www.lvr.com/usbchips.htm for various manufacturers OTG interfaces.

If you can use a memory card such a Compact Flash or MMC rather than a USB memory stick then things are a lot simpler and a PIC could be used.  There are numerous projects published on the web, as usual Google should reveal everything.

Regards

Mike

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2006\03\20@091357 by M. Adam Davis

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I recently saw a USB host chip that should do what you need.
Unfortunately it wasn't interesting enough to me to take notes.

It indicated that it would easily interface to any microcontroller,
and supported USB keyboards, mice, memory sticks, and some other USB
items.

So while I can't help you find it, rest assured that something exists.

Good luck.

-Adam

On 3/20/06, changhp <.....changhpKILLspamspam.....hotmail.com> wrote:
{Quote hidden}

> -

2006\03\20@134017 by Padu

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From: "changhp" <EraseMEchanghpspam_OUTspamTakeThisOuThotmail.com>
>
> Hi Friends:
>
> I am making a DIgital Voice Recorder which can record sound and save the
> audio files on a USB Flash Memory Drive. are there any one particular one
> chip can simplely do all the job, or can you give me some suggestions on
> which are the chips that I need to buy.
>
>
> Thank you very much.
>
> Charles


Well, not exactly what you were asking but close.

Look at the Micronas 3556B, it has embedded USB functionality.

Cheers

Padu

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