Hi Chris,

> For example, I intend to
> play with Sean Alcorn's book circuit because now I can watch any
> effects on
> the PIC carefully before declaring it a good design.

As I pointed out in another post, it's not my design, but one of Paul
Benford's. I simply posted it to know if this was the circuit that
Roman was referring to in an earlier thread. However, this is of
interest to me, as my next project will involve speed control using a
triac. I am still not sure if Roman is referring to the Power Supply or
the zero cross detection. But I have a similar, but slightly more
advanced power supply in about 6 different products, and we have
produced tens of thousands of these products without any failures. The
oldest are approaching 3 years old, and therefore far outperform older
analogue circuits we had previously. I've also seen these types of
supplies used in many reliable commercial products.

> I'm already thinking about load inductance......

Are you referring to the load switched with a triac? I will use a choke
in my prototype. I will be interested to hear what you find in your
investigations. I too have built myself a Bitscope recently.

Best Regards,

Sean

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