Just adding the Excel BOM files for these boards, both domestic and offshore versions.
Total costs are about $15 for domestic and $5 for offshore. About the usual difference. One huge difference is $6.10 each for OSH Park boards, versus less than a dollar for offshore. I have also included .1" pitch screw terminals for both, though these are not available domestically from what I can see. You can reduce the price by about one dollar a board by eliminating these and going with a lesser expensive option such as DuPont connectors. Another option is to simply solder wires to the board connections. There are lots of choices.
These BOM's are for a full build including bridge rectifier and filter capacitor (not necessary for DC power supply) and an onboard 7808 regulator, which is not necessary for a DC supply up to about 12 VDC. These components should probably all be included for use with an AC supply however.
I can add a pdf version if anyone needs that option. Rod
