How about an electronic digital timer. The kind you plug into a wall
outlet having programmed it to turn on , say a table lamp, to convince
the burglars someone is at home. These can be programmed in 1 minute
increments.
Simple,low cost and readily available. Could be programmed to do a 10
minute warm up for the fluoro tubes, then off for a minute to place
the PCB then on for the
desired exposure. It would turn off by itself so you could walk away
and have 24 hrs or a week to return before the cycle repeated if it
did not have the one time event option.
May be inconvenient for doing many exposures unless it has the
settable countdown feature,as mine does. I can set it for, say, 3
minutes and it will only provide power to the lamps for 3 minutes.
Additionally it has other uses around the home when needed.
Here's mine, available in New Zealand/Australia
http://www.kambrook.com.au/product.asp?id=50Regards
Warren
"Howard"wrote:
>
> I need a timer for my uv light box that i have just made this week
> range from about 0 to 10 mins would do the trick.
>
> Anyone got any diagrams and pcb layouts (single side) for making one ?
>
> something like, counts down then switchs off and sounds a buzzer ??