We wrote up a video about speeding up Arduino code, specifically by avoiding DigitalWrite. Now, the fact that DigitalWrite is slow as dirt is long known. Indeed, a quick search pulls up a Hackaday ...

The Arduino Mega's PWM pins are digital output ... send another analogWrite() function with a different value or call a digitalWrite() or digitalRead() on pin D11. However, in most codes with ...

Did you know that you can use Arduino to turn on an LED when you press a button? Well, it is true, you can do this! Leaving the joke aside, let me show how you can achieve this. You will need the ...