Programming Arduino: Getting Started with Sketches (Tab) by Monk Simon

Author:Monk, Simon [Monk, Simon]
Language: eng
Format: epub, pdf
Publisher: McGraw-Hill Education
Published: 2016-06-28T16:00:00+00:00

const int inputPin = 5;

void setup()

{

pinMode(inputPin, INPUT_PULLUP);

Serial.begin(9600);

}

void loop()

{

int reading = digitalRead(inputPin);

Serial.println(reading);

delay(1000);

}

Debouncing

When you press a pushbutton, you would expect that you would just get a single change from 1 (with a pull-up resistor) to 0 as the button is depressed. Figure 6-8 shows what can happen when you press a button. The metal contacts in the button bounce. So a single button press becomes a series of presses that eventually stabilize.

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