Demo: Blink an external LED

Code run restore

var b = require('bonescript');
var led = "P8_13";
var state = 0;

b.pinMode(led, 'out');
toggleLED = function() {
    state = state ? 0 : 1;
    b.digitalWrite(led, state);
};

timer = setInterval(toggleLED, 100);

stopTimer = function() {
    clearInterval(timer);
};

setTimeout(stopTimer, 30000);

Build and execute instructions

• Connect an LED and resistor as shown being sure to get the anode/cathode orientation correct.
• Run the example code and observe the blinking.
• Alter the frequency and re-run the example.

See also

Topics

• BeagleBone expansion headers
• Digital I/O
• Timers

Related functions

• require
• pinMode
• digitalWrite

Examples

• Blink an on-board LED

Where to buy

• BreadBoard
• External LED
• Jumper wires
• Resistors