When to use a common collector amplifier (3-Transistors)

A common collector amplifier has a gain of only 1. So what's the purpose of it? Let's show how it serves nicely as a buffer! Let's start to find its input and output impedance too. Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore. https://danner.group Video filmed and edited by Cheryl Lim. @randomcheryl