I'm the loyal opposition. :)
The op is free to use whatever they like, i simply offer my opinion.
On Dec 16, 2013 3:08 PM, "Jean-Paul Louis" <louijp@yahoo.com> wrote:

> David,
>
> Why bother with an AVR?
> Aren=92t we in a PIClist?
> A six pin SOT23-6 device from 10f200 series followed by a MOSFET
> transistor would take care of the requirements. Low current would not eve=
n
> need the transistor.
>
> My $0.02,
> Jean-Paul
> AC9GH
>
> On Dec 16, 2013, at 2:45 PM, David VanHorn <microbrix@gmail.com> wrote:
>
> > I agree, the 555 is not well suited to this application with real
> > components.  Additionally,  10M resistors are trouble because of humidi=
ty
> > and pcb contamination issues.   If i had to solve this problem,  i woul=
d
> > use one of the six pin AVR controllers like the tiny4 running on the
> > internal r/c oscillator.   You get four I/O pins and far better control
> of
> > the output.  Not as much drive current and a more narrow power range, b=
ut
> > that may not be an issue for you.
> >
> > FWIW.
> > --
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>
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