On Tue, 9 Feb 2010 11:14:46 -0800 (PST), "iansmith" said: > I want to be able to have a PIC run a large number of elements that need > higher voltage than the PIC can handle. > > For devices that can be configured to sink, the ULN2003 series works > great > and are cheap at $0.50 to $0.10 depending on quanity. > > Sourcing current seems to be a much more expensive proposition. I found > some MOSFET based devices like UDN2982A that can do 500mA at 50V and are > logic controller which is a plus. But they are $2.00 to $1.50 in quanity > with 8 pins of output. Hi Ian, I have used the TD62783A and they are about a dollar for 8 pins. About the same ratings as the ULN2003 but these are sourcing drivers. Your choice of packaging. Cheerful regards, Bob -- http://www.fastmail.fm - Access your email from home and the web -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist