i have a question i ordered some 2n3904 transistors by mistake i should have ordered 3906 iknow one is npn and the other pnp the question is can i reverse these to make them work i am working on a simple 2 led flasher using 2 transistors 2 caps and 4 risistors just a simple circuit but i need about 10 of these circuits i am trying not to reorder the 3906s thanks for any help jerry

 

You need to post your schematic for us to evaluate.

hgmjr

 

set them up pretty much like you would NPN, then just connect ground at the top and +5 at the bottom