Hi all, quick question here. As part of a sophomore seminar class, I have this little task to complete. I currently want to send a series of 4 bits through an IR LED that will reach a GaAs photo transistor. What I'm doing is using a shift register to load in the binary value (via a parallel link) to the shift register. Then I will clock the chip and output the same value serially. Now, my question is, how do I interface the shift register and my transmitting LED circuit...? For my LED circuit, I'm thinking about something like (schematic drawing... these parts are in series)... Vdd --- IR LED --- Resistor --- GND. I'm not too sure how to interface the two.