Problem running DC motor with Johnny Five

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I'm trying to run dc motor mt64to arduino uno using example from johnny five tutorial, but when I run my script, I hear only high pitch sound and the motor's not moving.

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var five = require("johnny-five"),
  board, motor, led;

board = new five.Board();

board.on("ready", function() {
  // Create a new `motor` hardware instance.
  motor = new five.Motor({
    pin: 5
  });

  // Inject the `motor` hardware into
  // the Repl instance's context;
  // allows direct command line access
  board.repl.inject({
    motor: motor
  });

  // Motor Event API

  // "start" events fire when the motor is started.
  motor.on("start", function() {
    console.log("start", Date.now());

    // Demonstrate motor stop in 2 seconds
    board.wait(2000, function() {
      motor.stop();
    });
  });

  // "stop" events fire when the motor is stopped.
  motor.on("stop", function() {
    console.log("stop", Date.now());
  });

  // Motor API

  // start([speed)
  // Start the motor. `isOn` property set to |true|
  // Takes an optional parameter `speed` [0-255]
  // to define the motor speed if a PWM Pin is
  // used to connect the motor.
  motor.start();

  // stop()
  // Stop the motor. `isOn` property set to |false|
});

Any suggestions what I'm doing wrong? The motor is fine. When I change pin ~5 to 5V pin it spins.

Thanks for any help.

2

Please post your code and your schematic.

3

Hi Planet71,
I was going to say, I think we need a few more details! But just took a look at that so called tutorial...

DO NOT do what then say, you are in danger of ruining your Arduino, never try to drive a motor or servo directly from your Arduino, it can not cope with the current demands of a motor, unless a very low current, as the arduino can only supply about 40mA. OK for LEDs but not much else, you need at least a transistor to act as a switch or an H-bridge if you want to reverse it..

The high pitch hummmmm is not a good sign.

and what is that strange code, you don't need a library to run a motor, learn some simple code, it's the only way to learn...

Hope it helps, regards.

Mel.

4

Thank you so much, Cactusface. I've used H-Bridge tutorial, and it works well!

5

That site also encourages destroying pin13 with a directly connected LED too.