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:

Code Example​

Wiring Example​

Code Example

Wiring Example