Carl Boyd wrote:
It has to do with the output transistor construction. From a practical
point of view, if your load has to be grounded get the PNP, if the load has
to be tied to the power supply, get the NPN.
--Wow that's the simplest explanation of the difference in the two
I've ever read; thanks! :-)

--
"Steamboat Ed" Haas : Never thought I'd live to see
Hacking the Trailing Edge! : our "iron curtain" crumble...
www.nmpproducts.com
---Decks a-wash in a sea of words---