I'd say in the build it yourself scheme ... avoid 110 or 220 like the
plague - you can get an unpleasant shock! . Use high intensity LEDs if
at all possible. These can be run from batteries. I don't know about
their output vs. drop in voltage but they consume little power and
should provide a fairly steady output. You can get them at Radio Shack.
You can also get a CdS photocell there.
BTW, the calibrated Stouffer wedge may be expensive. I have not checked
price myself though.
cheers,
andy
PhotoRoy6@xxxxxxx wrote:
In the US to get 220 volts you just run two hot lines to the electrical
outlet. Some clothes dryers and other machinery use to run on 220 volts in the
US.
Roy
