> PITA doing that with 555 timers, etc. A breeze with the PIC.
>

I did kind of the same thing with a torch.
Amid snickers from people I explain to that this is a microcontroller
based torch they stop laughing and want one when I explain the
processor cost around $3 (12c672), it manages a lead acid battery
(turning off bulb before 5.3v... (6volt battery)), has soft start and
displays the state of charge on a tri-colour led. Parts cost around
NZ$8 + SLA battery + Eveready Dolphin Torch.
One of the simpler apps I have made but about the most satisfying to
have the Best torch that money cant buy.
I make them for family members, complete with water-proof charging
dock.
Lance Allen
Uni of Auckland
New Zealand