From: "Jeff Verive"
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com>
Subject: Re: Wanted - design/consultation for talking toy project
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Tue, 21 Jan 2003 16:39:37 -0600
NNTP-Posting-Date: Tue, 21 Jan 2003 16:39:39 CST
Of course, if you are simply trying to create tones for a musical melody, no
A/D, D/A or other really exotic stuff is required. It is very simple to
design an electronic music box, with a 4-bit microcontroller and a few extra
components (for timing and for driving a piezo speaker).
"Lewin A.R.W. Edwards" wrote in message
> firstname.lastname@example.org (mark hahn) wrote in message
> > I enjoyed your "give the dog a chip" article, sorry i didn't credit
> > you, i couldn't find the issue.
> Oh, that's no problem, I was just identifying myself.
> > seconds of sound. Unless ADPCM is a lot more efficient at compressing
> > sounds than i thought.
> You'd use 6-8kHz, 4 or 5 bit ADPCM.
> > I haven't seen too many serial eeproms larger than 64k bytes. How
> > would you do a couple of minutes of sound without multiple eeproms?
> Well, firstly: those parts are available up to at least 2MBits.
> Secondly, they can be cascaded. A "start address" is programmed into
> the part. You can cascade by wiring in parallel.