Slightly OT: Tone Generators

[The Old Crow]

On Tue, 9 Nov 1999, Keith Bailey wrote:

> I am currently studying for my GCSE electronics and was wondering if any
> ofyou cold think of a chip which  could produce a pulsing tone (like when
> lorries reverse) without to much external circitry as it needs to be quite
> small.

  PIC12C508, programmed to sound a gated tone @440Hz or so.  Drive a piezo
buzzer or 1-transistor amp/speaker.  12C508s are far more useful than
555s for these sorts of things.

  --Crow

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