The library gives easy control over the 16 pins of the PCF8575 chips. Base address = 0x20 + 0..7 depending on address pins A0..A2. PCF8575C 0x20 to 0x27 need pull up in input mode. See #36, to be ...

That’s the Rate of Perceived Exertion (RPE) working in your favor—you are working hard, but because you don’t perceive the extra effort, you move past your usual limits without using the ...