Products for USB Sensing and Control
Products for USB Sensing and Control


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4A Stepper Phidget

ID: STC1003_0
Recommended for new designs: This product (or a similar replacement with a compatible form, fit and function) is estimated to be available for ten years or more.

This compact Stepper Phidget gives you control of one bipolar stepper motor from a port on your VINT hub.


Quantity Available: 550

Qty Price
5 $38.00
10 $36.00
25 $32.00
50 $28.00
100 $26.00
250 $24.00
500 $22.00
1000 $20.00

The STC1003 allows you to control a bipolar stepper motor (up to 4A). This Phidget connects to your computer through a VINT Hub.


  • Control position, velocity, and acceleration
  • Current Control - Set the current limit and holding current separately
  • Two Drive Modes - Step mode specifies a target position in 1/16th steps. Run mode rotates continuously at a specified velocity.

Technical Details:

  • Isolation - The VINT hub and the computer will be protected if anything goes wrong with your circuit
  • Polarity Protection - The device will not turn on and will not be damaged if the power supply is connected backward
  • Overcurrent Protection - Onboard fuse to protect the controller in an over-current event
  • Overheating Protection - A built-in heatsink prevents overheating
  • Failsafe Protection - Set the device to turn off if automatically your program becomes unresponsive
  • Power Saving - Separate control over the current limit and the holding current limit

Power Guards

Using motor controllers with large motors can pose a risk for your power supply. If your supply does not have protective features built-in, you can use a Power Guard Phidget to prevent damage from power spikes from back EMF that is generated when motors brake or change direction. We recommend that you use the SAF2000 for any motor with a coil current between 1.5 and 5 amperes, and the SAF1000 for motors above 5A.

Image Part Number Price
SAF1000_0 $60.00
SAF2000_0 $10.00

Bipolar Stepper Motors

The STC1003 can control both unipolar and bipolar motors, but in almost all cases you're better off with a bipolar motor due to their increased power and more precise step angles. If you care about torque, large motors with high gear ratios are your best bet. If you car about speed, motors with no gearbox and high step angles are better. If you want precision, steppers without gearboxes and low step angles are best because while gearboxes do result in smaller steps, they also introduce a flat 1-3 degrees of positional error due to backlash in the gears.

Product Motor Properties Electrical Properties Physical Properties Gearbox Properties
Image Part Number Price Step Angle Rated Torque Maximum Motor Speed Recommended Voltage Shaft Diameter Weight Gear Ratio
3320_0 $16.00 1.8° 520 g·cm 1300 RPM 24 V DC 5 mm 111.4 g
3321_0 $36.00 0.067° 14 kg·cm 50 RPM 24 V DC 6 mm 217.5 g 26 103121 : 1
3322_0 $38.00 0.018° 32 kg·cm 13 RPM 24 V DC 6 mm 243.6 g 99 10442057 : 1
3323_0 $16.00 1.8° 1.2 kg·cm 1000 RPM 24 V DC 5 mm 200 g
3324_0 $16.00 1.8° 3.3 kg·cm 1000 RPM 24 V DC 5 mm 289 g
3325_0 $40.00 0.35° 18 kg·cm 200 RPM 24 V DC 8 mm 457 g 5 211 : 1
3326_0 $42.00 0.13° 30 kg·cm 70 RPM 24 V DC 8 mm 502 g 13 212289 : 1
3327_0 $44.00 0.067° 30 kg·cm 40 RPM 24 V DC 8 mm 503 g 26 103121 : 1
3328_0 $46.00 0.035° 48 kg·cm 20 RPM 24 V DC 8 mm 564 g 50 43974913 : 1
3329_0 $48.00 0.018° 48 kg·cm 10 RPM 24 V DC 8 mm 564 g 99 10442057 : 1
3330_0 $28.00 0.9° 11.2 kg·cm 500 RPM 24 V DC 14 695 g
3332_0 $70.00 0.42° 46.6 kg·cm 165 RPM 24 V DC 12 mm 1.2 kg 4 14 : 1
3333_0 $72.00 0.12° 150 kg·cm 50 RPM 24 V DC 12 mm 1.3 kg 15 310 : 1
3334_0 $74.00 0.023° 240 kg·cm 10 RPM 24 V DC 12 mm 1.5 kg 76 4964 : 1
3335_0 $60.00 1.8° 30 kg·cm 200 RPM 30 V DC 12 mm 1.8 kg
3340_0 $20.00 0.9° 3.3 kg·cm 400 RPM 24 V DC 5 mm 288 g


This Phidget is a smart device that must be controlled by a VINT Hub. For more information about VINT, have a look at the VINT Primer. You can use a Phidget Cable to simply and easily connect the two devices. Here's a list of all of the different VINT Hubs currently available:

Product Board
Image Part Number Price Number of VINT Ports Controlled By
HUB0000_0 $30.00 6 USB (Mini-USB)
HUB5000_0 $60.00 6 Local Network (Ethernet or Wi-Fi)
SBC3003_0 $120.00 6

Phidget Cables

Use a Phidget cable to connect this device to the hub. You can solder multiple cables together in order to make even longer Phidget cables, but you should be aware of the effects of having long wires in your system.

Product Physical Properties
Image Part Number Price Cable Length
3002_0 $2.00 600 mm
3003_0 $1.50 100 mm
3004_0 $3.00 3.5 m
3034_0 $1.50 150 mm
3038_0 $2.25 1.2 m
3039_0 $2.75 1.8 m
CBL4104_0 $1.75 300 mm
CBL4105_0 $2.00 900 mm
CBL4106_0 $2.50 1.5 m

Power Supplies

This Phidget requires a power supply between 8 and 30V DC. We recommend that you use a 12V DC power supply for small steppers and a 24V DC supply for larger ones. If you're not sure, check the data sheet for your motor for the recommended power supply voltage (not to be confused with the coil voltage, which is usually much lower). For best results, we recommend getting a 5 amp supply. Select the power supply from the list below that matches your region's wall socket type.

Product Electrical Properties Physical Properties
Image Part Number Price Power Supply Current Output Voltage Wall Plug Style
3022_0 $10.00 2 A 12 V Australian
3023_1 $10.00 2 A 12 V European
3024_1 $10.00 2 A 12 V North American
3025_0 $10.00 2 A 12 V British
3084_0 $1.50 500 mA 12 V European
3085_0 $1.50 500 mA 12 V North American
3086_0 $10.00 1 A 24 V North American
PSU4013_0 $20.00 2.5 A 24 V
PSU4014_0 $40.00 5 A 24 V
PSU4015_0 $20.00 1 A 24 V
PSU4016_0 $40.00 15 A 24 V
PSU4017_0 $75.00 15 A 24 V
PSU4018_0 $20.00 5 A 12 V

Power Supply Pigtail

You can use a pigtail wire if you want to avoid removing the barrel jack connector from your supply's cord:

Product Physical Properties
Image Part Number Price Connector A Connector B Cable Length Cable Gauge
3031_0 $2.75 Power Jack 5.5 x 2.1mm (Female) 2 Loose Wires 250 mm 20 AWG
CBL4209_1 $2.75 Power Jack 5.5 x 2.1mm (Female) 2 Loose Wires 250 mm 20 AWG

Part 1: Setup

Welcome to the STC1003 user guide! In order to get started, make sure you have the following hardware on hand:

Next, you will need to connect the pieces:

STC1003 Functional.jpeg
  1. Connect the STC1003 to the VINT Hub using the Phidget cable.
  2. Connect the stepper motor to the Phidget's output terminals. See your motor's data sheet or product page for wiring instructions.
  3. Connect the VINT Hub to your computer with a USB cable.
  4. Connect the power supply to the power terminals on the STC1003.

Now that you have everything together, let's start using the STC1003!

Phidget Control Panel

In order to demonstrate the functionality of the STC1003, the Phidget Control Panel running on a Windows machine will be used.

The Phidget Control Panel is available for use on both macOS and Windows machines.


To open the Phidget Control Panel on Windows, find the Ph.jpg icon in the taskbar. If it is not there, open up the start menu and search for Phidget Control Panel

Windows PhidgetTaskbar.PNG


To open the Phidget Control Panel on macOS, open Finder and navigate to the Phidget Control Panel in the Applications list. Double click on the Ph.jpg icon to bring up the Phidget Control Panel.

For more information, take a look at the getting started guide for your operating system:

Linux users can follow the getting started with Linux guide and continue reading here for more information about the STC1003.

First Look

After plugging the STC1003 into your computer and opening the Phidget Control Panel, you will see something like this:

STC1003 Panel.jpg

The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:

  • Serial number: allows you to differentiate between similar Phidgets.
  • Channel: allows you to differentiate between similar objects on a Phidget.
  • Version number: corresponds to the firmware version your Phidget is running. If your Phidget is listed in red, your firmware is out of date. Update the firmware by double-clicking the entry.

The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.

Part 2: Using Your Phidget


Control a medium-sized (4A) stepper motor with the STC1003. With this Phidget, you can set your motor's position, velocity, and acceleration.

STC1003 About.jpg

Explore Your Phidget Channels Using the Control Panel

You can use your Control Panel to explore your Phidget's channels.

1. Open your Control Panel, and you will find the 4A Stepper Phidget channel:

STC1003 Panel.jpg

2. Double click on the channel to open an example program. This channel belongs to the Stepper channel class:

Stepper: Control the stepper position and other motor properties

In your Control Panel, double click on "4A Stepper Phidget":


Part 3: Create your Program

1. Setting up your Programming Environment

2. Phidget Programming Basics

Part 4: Advanced Topics and Troubleshooting

How do I know what channel, serial number, or hub port to use in my program?

Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.

1. Open the Control Panel and double-click on the red map pin icon:

The locate Phidget button is found in the device information box

2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.

All the information you need to address your Phidget

See the Phidget22 API for your language to determine exact syntax for each property.

Rescale Factor

Product Specifications

Board Properties
Controlled By VINT
Controller Properties
Motor Type Bipolar Stepper
Number of Motor Ports 1
Motor Position Resolution 1/16 Step (40-Bit Signed)
Position Max ± 1E+15 1/16 steps
Stepper Velocity Resolution 1 1/16 steps/sec
Stepper Velocity Max 115000 1/16 steps/sec
Stepper Acceleration Resolution 1 1/16 steps/sec²
Stepper Acceleration Min 2 1/16 steps/sec²
Stepper Acceleration Max 1E+07 1/16 steps/sec²
Sampling Interval Min 100 ms/sample
Sampling Interval Max 60 s/sample
Electrical Properties
Available Current per Coil Max 4 A
Supply Voltage Min 10 V DC
Supply Voltage Max 30 V DC
Current Consumption Min (VINT Port) 500 μA
Current Consumption Max (VINT Port) 1 mA
Quiescent Power Consumption Max 200 mW
Replacement Fuse 5A Slow Blow Blade Type, Regular or Micro
Physical Properties
Recommended Wire Size 16 - 26 AWG
Operating Temperature Min -20 °C
Operating Temperature Max 85 °C
Customs Information
Canadian HS Export Code 8471.80.00
American HTS Import Code 8471.80.40.00
Country of Origin CN (China)


Product History

Date Board Revision Device Version Comment
May 2019 0 101 Product Release
May 2019 0 110 Added failsafe timer functionality
Sept 2019 0 111
  • Fixed issue where stepper could stop functioning while still attached
  • Velocity changes that cause the motor to stop now cause deceleration instead of abrupt stop
  • Changing acceleration while the motor is moving now works properly as long as velocity is between -1000 and +1000 steps/sec. Changing acceleration outside of this velocity range can cause unpredictable acceleration behaviour because the device cannot recalculate the accerlation curve fast enough
  • Fixed issues that occured when switching between Run mode and Step mode and vice-versa while the motor is running
October 2019 0 112 Fixed msfollower bug
August 2020 0 113 Fixed crash that made STC1003 unresponsive until power cycle
November 2020 0 114 Fixed crash that could occur at low acceleration

Software Objects

Channel NameAPIChannel
Bipolar Stepper Controller Stepper 0


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Code Samples

Example Options


				Make your selections to display sample code.

Code Samples


Stepper Visual Studio GUI C# Windows Download
Stepper Java Android Download
Stepper JavaScript Browser Download
Stepper Objective-C macOS Download
Stepper Swift macOS Download
Stepper Swift iOS Download
Stepper Visual Basic .NET Windows Download
Stepper Max/MSP Multiple Download

Have a look at our stepper controllers:

Product Controller Properties Electrical Properties
Image Part Number Price Motor Position Resolution Stepper Velocity Resolution Stepper Velocity Max Available Current per Coil Max
1067_0B $90.00 116 Step (40-Bit Signed) 1 1/16 steps/sec 250000 1/16 steps/sec 4 A
STC1002_0 $80.00 116 Step (40-Bit Signed) 1 1/16 steps/sec 115000 1/16 steps/sec 8 A
STC1003_0 $40.00 1/16 Step (40-Bit Signed) 1 1/16 steps/sec 115000 1/16 steps/sec 4 A