have you looked at the IRF7342's? They're the P-channel version of the IRF7341, a chip I'm very fond of, and they're only $1 in qty1. They're not through-hole, but you can surfboard them and still putter around. I found it a lot cheaper to make my own surfboards by using PCB-Express or similar and creating a whole variety of smt configurations (in this case soic8) surrounded and attached to a standard dip configurations (DIP8) then when you get them, cut them out (outside, that dust is nasty), put the SMT component on, solder leftover LED legs through the holes and stick 'em on your breadboard. If this doesn't make any sense drop me a mail, I'll send you a piccie. DougM On Tue, Feb 9, 2010 at 1:43 PM, Bob Blick wrote: > > 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 > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist