On Jul 25, 2010, at 4:34 AM, Olin Lathrop wrote: > keep in mind that your employer's cost to keep you around is more =20 > than you get paid. While in general I agree with Olin here (just get the board =20 professionally made), I'd like to point out that the economics of =20 employing students at a university can be "strange." Salaries may be =20 effectively zero to the employing department (ie paid for as =20 "financial aid" from some other budget), while coming up with real =20 "cash" to pay an outside service to make a PCB might be difficult. I get my single-sided PCB material from eBay: http://stores.ebay.com/PCB-La= minates-Copper-Clad?_rdc=3D1 But there is likely to be a local supplier if you want small =20 quantities of photosensitive board. BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .