PNP vs NPN video: Breaks down the transistors in a very simple instructional tutorial

Hey all!

I found this video to be extremely helpful in describing the difference between PNP and NPN transistors.

Takeaway:

NPN uses a positive signal to allow current to flow through the circuit
PNP uses a ground signal to complete the circuit to allow current to flow through the circuit

http://www.youtube.com/watch?v=F-Cv7CMHoGM