IR Circuits (Infrared)

I will be showing a video with the basics behind figuring out a mystery component and also building a Infrared Receiver and Transmitter Circuit using:
1838B IR Receiver
IR LED
LED
220R Resistor x2
9V Battery
And just one wire this time

Music:
Chase of Nobility - https://www.youtube.com/watch?v=fWlpAK_cABE
Comically Large Song - https://www.youtube.com/watch?v=hC4gm0nF5hc
Supreme Royalty - https://www.youtube.com/watch?v=fj-rBs9S-ro