I am looking for new applications for my PIC based phase angle controllers
and have seen older UV systems that used old analog phase angle controllers
to control lamp current. It is possible to phase control a higher secondary
voltage directly, but I'm hoping to find a way to keep the SCR's on the
Primary side - it gets more & more difficult to isolate the PIC's supply
from the line voltage as it increases, and the primary side is the lowest
point to do so.

PWM at moderate frequencies is also supposed to be a good method, but I'm
really interested in finding how the newest generation of electronic
ballasts works. I'm sure this would make for an interesting PIC project....


C
>
>> Is there anyone on the list that has experience with UV lamp ballasts?
>
>
> What kind? The high power arc type used for UV curing?
> The short-arc type used for commercial PCB exposure?
>
> The fluorescent ones (germicidal, black light etc.) are just the same as
> the same wattage/size of regular fluorescent bulbs.


What would you like to know? I got experience with high power ones used
for UV curing.
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