NPN Foundations of Technology NPN © 2013 International Technology and Engineering Educators Association, STEM Center for Teaching and Learning™ Foundations.
NPN 2N3904 Collector Base Emitter The flat side faces up.
PNP Foundations of Technology PNP © 2013 International Technology and Engineering Educators Association, STEM Center for Teaching and Learning™ Foundations.
How an NPN Transistor Works
