Thanks all for your help.  Using two 555's makes sense to me. (Though I'll =
have it going on the Raspberry far quicker than it would take me to wire th=
at up.)=20

I had a feeling that the 555 wouldn't do what I thought.  I got that becaus=
e when doing the timing calculations it seemed that I needed parts with val=
ues that I just didn't have.  But just a feeling.  That's why I asked.

I'm curious now, how did you know that what I wanted was beyond the 555?

Thanks,
Lindy
________________________________________
From: piclist-bounces@mit.edu [piclist-bounces@mit.edu] on behalf of Dwayne=
 Reid [dwayner@planet.eon.net]
Sent: 11 December 2013 20:32
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Help configuring a 555

That duty cycle is going to be hard to achieve with a single 555
timer.  You are far better off using a pair of 555 timers or the
smallest PIC that you have laying around.


--=20
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