> On a one off for personal use it may be fine, but there are many that
> would refuse to put such a device on the market.

I don't agree. It's simply a matter of "horses for courses". I am
manufacturing industrial timers with timing accuracies of better than
+/- 3% - previously the best we could even dream about with equivalent
analogue circuits was +/- 10% - and that was before degradation of
components over the life of the product.

There are thousands of applications where timing accuracy is not
critical and the PICs (and other) MCUs with inbuilt oscillators will
find their way into those if they have not already.

I am sure that when I shut off the compressor in your A/C unit, you do
not care if I wait 300 seconds or anywhere from 291 to 309 seconds
until we allow it restart again?

In my situation, the accuracy of the clock has a direct effect on the
accuracy of my products, and therefore the published specifications of
those products. But they are certainly acceptable specifications and
far superior to what were in the marketplace before (comparing apples
with apples, of course). But there are a host of applications out there
where timing is not as critical as even our application!

The internal clock gets my vote - for the hobbyist and certain
production applications.

Regards,

Sean

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