Part 1 It is not usually long before new Arduino users discover that although the delay() function is easy to use it has side effects, the main one of which is that its stops all activity on the Arduino until the delay is finished (not quite true, I know, but that is usually how the problem present…

Part 2 We have seen how to turn an LED on and off at intervals which is fascinating for maybe a minute or two at most but how about using the same principle to change the brightness of an LED ? I will use an LED on pin 10 in this example as that pin supports PWM output. The basis of the program wi…

Part 3 Here we go then with counting button presses in a 5 second period The program unsigned long startMillis; unsigned long currentMillis; const unsigned long period = 5000; //period during which button input is valid const byte buttonPin1 = A1; //button on pin A1 byte currentButtonState; …

Part 4 Here is a program that will count button presses in a 5 second period but in this version the button has to remain pressed for 20 milliseconds before the button press is counted. Can you guess what we use to time the 20 milliseconds ? unsigned long periodStartMillis; unsigned long currentMi…

Using millis() for timing. A beginners guide

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Using millis() for timing. A beginners guide

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