Meadow.Foundation.Motors.Stepper.Uln2003

Uln2003
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

ULN2003 is a high voltage, high current Darlington array containing seven open collector Darlington pairs. The ULN2003 is often packaged on board used to control stepper motors.

Code Example

Uln2003 stepperController;

public override Task Initialize()
{
    stepperController = new Uln2003(
        pin1: Device.Pins.D01,
        pin2: Device.Pins.D02,
        pin3: Device.Pins.D03,
        pin4: Device.Pins.D04);

    return base.Initialize();
}

public override Task Run()
{
    stepperController.Step(1024);

    for (int i = 0; i < 100; i++)
    {
        Resolver.Log.Info($"Step forward {i}");
        stepperController.Step(50);
        Thread.Sleep(10);
    }

    for (int i = 0; i < 100; i++)
    {
        Resolver.Log.Info($"Step backwards {i}");
        stepperController.Step(-50);
        Thread.Sleep(10);
    }

    return base.Run();
}

Sample project(s) available on GitHub

Wiring Example

To wire a ULN2003 to your Meadow board, connect the following:

ULN2003	Meadow Pin
GND	GND
VCC	3V3
INT1	D01
INT2	D02
INT3	D03
INT4	D04

It should look like the following diagram:

Class Uln2003

This class is for controlling stepper motors that are controlled by a 4 pin controller board.

Assembly: Uln2003.dll

View Source

Declaration

public class Uln2003 : IDisposable

Implements:
System.IDisposable

Properties

AngularVelocity

Sets the motor speed to revolutions per minute.

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Declaration

public AngularVelocity AngularVelocity { get; set; }

Mode

Sets the stepper's mode.

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Declaration

public Uln2003.StepperMode Mode { get; set; }

IsDisposed

Is the object disposed

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Declaration

public bool IsDisposed { get; }

Methods

Stop()

Stop the motor

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Declaration

public void Stop()

Step(int)

Moves the motor - If the number is negative, the motor moves in the reverse direction

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Declaration

public void Step(int steps)

Parameters

Type	Name	Description
System.Int32	steps	Number of steps

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

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Declaration

public void Dispose()

Dispose(bool)

Dispose of the object

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Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	Is disposing

Implements

• System.IDisposable