> I need a simple squarewave generator with a range of 0 Hz to
> ~5kHz.  I tried breadboarding a simple 555 circuit, but it's
> horrendously unstable (the freq-counter is not thr problem).
>
> So far in books or on the web, the ones I've seen are built
> around specialized chips (8038, MAX038, XR2206, etc), that are
> not available locally nor at Digikey.
>
> Anyone here know of a simple circuit that will handle this
> requirement?  Accurate freq output is not important, but
> stability is, and sine/triangle is not important, but perhaps I
> could use it sometime in the future.

        Any reason you don't want to use a PIC? Something like this is quite simple
to do, even when doing it by bit banging. TTYL

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