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Power Functions IR Sender

Control your LEGO® Power Functions motors using your micro:bit or Calliope-Mini, an infrared LED and MakeCode. This extension turns your device into a remote control for your Power Functions devices.

A project using this extension is documented on hackster.io

Installation

Open MakeCode and select '+ Extensions' in the 'Advanced' menu. You need to enter our project URL https://github.com/philipphenkel/pxt-powerfunctions in the search field, hit return and then select the powerfunctions extension.

Documentation

powerfunctions.connectIrLed

Configures the infrared LED pin. A 940 nm emitting diode is required.

powerfunctions.connectIrLed(AnalogPin.P0)

Parameters

pin - analog pin with an attached IR-emitting LED

powerfunctions.setSpeed

Sets the speed of a motor.

powerfunctions.setSpeed(PowerFunctionsMotor.Red1, 3)

Parameters

motor - the motor
speed - the speed of the motor from -7 to 7.

powerfunctions.brake

Brakes then float. The motor's power is quickly reversed and thus the motor will stop abruptly.

powerfunctions.brake(PowerFunctionsMotor.Red1)

Parameters

motor - the motor

powerfunctions.float

Floats a motor to stop. The motor's power is switched off and thus the motor will roll to a stop.

powerfunctions.float(PowerFunctionsMotor.Red1)

Parameters

motor - the motor

powerfunctions.setMotorDirection

Configures a motor direction.

powerfunctions.setMotorDirection(PowerFunctionsMotor.Red1, PowerFunctionsDirection.Right)

Parameters

motor - the motor
direction - the direction of the motor

MakeCode Example

basic.showIcon(IconNames.Heart);
powerfunctions.connectIrLed(AnalogPin.P1);

powerfunctions.setMotorDirection(
  PowerFunctionsMotor.Blue1,
  PowerFunctionsDirection.Backward
);

input.onButtonPressed(Button.A, () => {
  powerfunctions.setSpeed(PowerFunctionsMotor.Blue1, 3);
});

input.onButtonPressed(Button.B, () => {
  powerfunctions.float(PowerFunctionsMotor.Blue1);
});

basic.forever(() => {
  led.plotBarGraph(input.lightLevel(), 255);

  if (input.lightLevel() > 200) {
    powerfunctions.float(PowerFunctionsMotor.Blue1);
    basic.pause(5000);
    powerfunctions.setSpeed(PowerFunctionsMotor.Blue1, 2);
    basic.pause(3000);
  }
});

Disclaimer

LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this project.

License

Licensed under the MIT License (MIT). See LICENSE file for more details.

Supported targets

for PXT/microbit