Crowtail- Button
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Contents
Description
The Crowtail-Button is a momentary push button which rebounds on its own after it is released. The button outputs a HIGH signal when pressed, and LOW when released.
Model: CT0002BT
Features
- Easy to use momentary ON/OFF button
- Uses Standard 3-pin Crowtail Cables to connect to the Crowtail - Base Shield
- Dimensions(mm):20.0(L)x20.0(W)x11.4(H)
Usage
Button control LED
1.Hardware connection
2.Upload the following sample sketch to make the LED turn ON and OFF based on input from Crowtial - Button:
/*
Button
Turns on and off a light emitting diode(LED) connected to digital
pin 5, when pressing a pushbutton attached to pin 4.
*/
// set pin numbers:
const int buttonPin = 4; // the number of the pushbutton pin
const int ledPin = 5; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}
3.Press the Botton, you will see the LED lights up.
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