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Motor - H-Bridge

Breadboard for "Motor - H-Bridge"

docs/breadboard/motor-hbridge.png

Fritzing diagram: docs/breadboard/motor-hbridge.fzz

 

Run this example from the command line with:

node eg/motor-hbridge.js
/*
  IMPORTANT!!! This example is not intended for off the shelf
  H-Bridge based motor controllers. It is for home made H-Bridge
  controllers. Off the shelf controllers abstract away the need
  to invert the PWM (AKA Speed) value when the direction pin is set
  to high. This is for controllers that do not have that feature.
*/

var five = require("johnny-five"),
  board = new five.Board();

board.on("ready", function() {
  var motor;
  /*
      Motor A
        pwm: 3
        dir: 12
   */


  motor = new five.Motor({
    pins: {
      pwm: 3,
      dir: 12
    },
    invertPWM: true
  });




  board.repl.inject({
    motor: motor
  });

  motor.on("start", function() {
    console.log("start", Date.now());
  });

  motor.on("stop", function() {
    console.log("automated stop on timer", Date.now());
  });

  motor.on("forward", function() {
    console.log("forward", Date.now());

    // demonstrate switching to reverse after 5 seconds
    board.wait(5000, function() {
      motor.reverse(255);
    });
  });

  motor.on("reverse", function() {
    console.log("reverse", Date.now());

    // demonstrate stopping after 5 seconds
    board.wait(5000, function() {
      motor.stop();
    });
  });

  // set the motor going forward full speed
  motor.forward(255);
});

 

License

Copyright (c) 2012-2014 Rick Waldron waldron.rick@gmail.com Licensed under the MIT license. Copyright (c) 2015-2018 The Johnny-Five Contributors Licensed under the MIT license.