This link feature a video starting at a specific time: https://youtu.be/t0UOSIUve9E?t=16m24s
For a common collector configuration, The teacher chooses the emitter voltage (output voltage) to be the half way between Vcc and gournd, Why?
Also, He does not explain why he choosed 5mA as a quiescent current?
What considerations should I take care of while choosing those values?
If I'm using PN2222A transistor and I want to drive 8-ohm speaker as a load (audio amplifier). What would be the values of emitter voltage and quiescent current ?