Andy asked:

>Does anybody know of any small (handheld) commercial strobes?  I need
>something that's no bigger than a medium-sized DMV which has an adjustable
>frequency light.  It doesn't need to be especially bright, as it's
>primarily for indoor use.
>
>I need to see if a rotating wheel is running true.  Speed would be a few
>hundred RPM to up to 60K, but I don't expect that in one package.
>

I think you can do this with a PIC. The new white LEDs are very, very
bright. These are the ones with a single junction, not the ones with three
RGB diodes. I've pulsed them at rates that would equate to a few hundred
RPM. Make a PIC-based variable pulse-rate, LCD readout, penlight size
timing light....

Reg Neale