>Alternatively put a gif up on a web site somewhere or send it to me direct
>& I'll have a quick look.

I've put the information up on the backend of my website
at  http://members.shaw.ca/gnat/led.htm
That has the schematic for the problem section and a image of the scope
signals.

>If you are using MOSFETS you will need more than 3.3V on the gate to turn
>them on properly. If you have only this voltage to play with you will need
>to change to a bipolar power transistor or arrange a higher voltage gate
>drive supply using a charge pump/aux supply or whatever. It would only need
>a mA or so depending on switching rate.
>
>Richard

Ok I'll dig out my books and get on the net and start looking for a
bipolar. It does need
to be able to handle about 1.7A at a 20% duty cycle. I'm almost stuck on
having to deal with
3.3 as my main supply voltage as going up to 5 will do a number on the cost
of things.It could
be done but I'd rather shy away from doing that unless I have to.

I really appreciate any and all help on this. I haven't had to play with
transistors for quite a few years
so I'm out of touch with what works in the 3.3v regime and what won't.

Cheers

Dave

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