You guys…thank you again for adding more support to this cause. I tried to make some circuitry. I failed so far but I think I figured out how to make an amplifier out of the HC04 and HC126. I tested the circuit instead of directly plugging it in to the BBB or Servo. Phew. I need to configure things more before I can understand what it is that needs to happen.
On the HC126, I think I misread what exactly I need to do to conform to its standard and the instructions for that specific chip. Dodged another bullet. Phew. So, my chips are still intact and the Servo/MCU is not damaged either.
P.S. I will keep plugging at it to see if I can alter things within the chip with source and/or how to communicate with both chips in @ROBOTIS-Will diagram. Anyway, I am playing it safe for now. I only have so many boards to damage before opting to purchase new ones. So, safety freak I “be.”