> No, it doesn't really save power for same brightness. With switching=20
> loss multiplexing fast enough to avoid flicker when moving head,
> power loss might be higher!

I was given the project by the customer, who's in a bit of a flap. And
it's what you might know as a 'hospital pass'

A couple of months ago he asked if I could modify one of my circuits
to do what he wants. I told him yes but I was busy for a couple of
days. He said he was in a hurry and went to someone else. Fair enough,
I'm already busy so didn't miss out on anything

Then he comes back to me last week with a prototype that doesn't
work very well at all. The reason ? It's been programmed using
PICAXE Basic. It is soooooooo slow (I believe PICAXE Basic
executes at about 1k IPS), so requests are missed and LED lighting
is confusing, as they are multiplexed with a very slow refresh rate,
with no fine control possible. There's your flicker !!

The 'big meeting' with a potential quantity user is next week. I should
be able to scratch something together with a TQFP 18F4520 if the
TQFP 18F43K20 isn't here by then

Joe

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