piclist 2001\01\08\090507a >
Thread: Anyway to create stable 115.2khz pulse
face picon face BY : Olin Lathrop email (remove spam text)

> And I like to know is there anyway to use a 555 timer to generate a
> stable, clean (sharp
> waveform) of 115.2khz.

Yes, but accuracy will be an issue if you want to use this for RS-232
timing.  RS-232 can only tolerate a 5.8% mismatch between the sending and
receiving baud rates at 8 bits per characters.  Of course the mismatch must
be below that in practise because this is the "guaranteed to fail" value.  I
try to stick to half that, or 2.9%.  It will be nearly impossible to
maintain that kind of accuracy with a 555 timer and the associated R/C

Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, .....olin.....spamembedinc.com, http://www.embedinc.com

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