Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Having been given several flat bed scanners I am finally going to build an exposure box and was thinking about the light source.

The boards could be as big as 5 x 5 inches down to .75 x .75 inches.

I look at the multi-led solutions and it seems like the non-collimated light might be an issue.

The nail dryer bulb solution might be slightly better but maybe not.

A single point source such as a single high powered led by definition would not be collimated but at least it would be a single point source. But then one has to deal with uneven exposure from viewing angle issues.

Any thoughts based on your experiences would be appreciated, including "Your are over thinking this! Just build the d..n box.".

Thanks,
Arvid