Next, I attached two FSRs (Force Sense Resistors). FSRs work by squeezing the rounded ends. The Arduino was programmed to light the LEDs as dimly or brightly according to how much pressure I was applying to the FSRs.
I’m still getting a grasp on how the circuitry works, and learning to read schematics. Learning to read a diagram that does not spatially correspond to the components is challenging, but it’s making more sense as I assemble and disassemble the components.