Digital Input

1 Digital Sensors
2 Digital Input – Switch (single throw)
3 Digital Input – Switch (double throw)
4 Using Digital Input

Digital Sensors

Digital sensors are (more) straight forward (than Analog)
No matter what the sensor there are only two states: On and Off
Signal is always either HIGH (On) or LOW (Off)
Voltage signal for HIGH will be 5V (more or less) on Arduino Uno. Other Arduinos could use different voltages!
Voltage signal for LOW will be 0V on most systems

Digital Input – Switch (single throw)

Digital Input – Switch (double throw)

NO = normally open

C = common

NC = normally closed.

Note :

The limit switch provided in EG1311 has a different order for NO, C, and NC.

The connections in the picture above need to be adapted accordingly.

Using Digital Input

Connect digital input to your Arduino using Pins # 0 – 13 (Avoid pins # 0 & 1 though as they are used for Serial later, and pin #11 and 13 as we are already using it)
Digital Input needs a pinMode function

pinMode (pinNumber, INPUT);

Make sure to use ALL CAPS for INPUT

To get a digital reading:

int buttonState = digitalRead (pinNumber);

Digital Input values are only HIGH (On) or LOW (Off)

http://opensourcehardwarejunkies.com/tutorial-03-digitalread-and-serial-port-communication/

C++	Blocks

C++

Blocks


void setup()
{
  pinMode (pinNumber, INPUT);
}
void loop()
{
  int buttonState = digitalRead(2);
  if(buttonState == HIGH)
  {  // do something
  }
  else
  {  // do something else
  }
}

In Tinkercad, we just need to Start Simulation, and click on the switch to turn it on/off.