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


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8A Stepper Phidget

ID: STC1002_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.

Control the position, velocity, and acceleration of one high-power stepper motor with this Phidget.


Quantity Available: 980

Qty Price
5 $76.00
10 $72.00
25 $64.00
50 $56.00
100 $52.00
250 $48.00
500 $44.00
1000 $40.00

Get moving with this powerful Bipolar Stepper Phidget. With a maximum power supply of 30V, it can provide up to 8A of current to each stepper coil. The result is that you can control the position, velocity and acceleration of one large bipolar stepper using a port on your VINT Hub (See the Connection & Compatiblity tab for a list of hubs). Steppers are especially popular in applications where accurate positioning is important.

Safety and Protection

The Stepper Phidget comes with a number of safety features, since motors have a reputation of damaging unprotected circuits with current spikes when a motor stalls or changes direction under heavy load. There's a fuse socket with a 10A automotive fuse to protect your Phidget in just such an occasion, and the power terminals are polarity protected in case the power supply gets wired up backwards. The VINT port on this Phidget is isolated from the power circuit, so you don't have to worry about damaging your hub or computer if something goes wrong. Ensure that this Phidget is in a well-ventilated area if you plan on running it close to maximum specifications.

Power Saving Options

For power-conscious users, we also allow for separate control over the current limit and the holding current limit. If you know your motor will be stationary for long periods of time, but still needs a small amount of holding torque to maintain its position, you can set the holding current appropriately without interfering with the running current limit.


warning Make sure the power supply is unplugged before attaching or removing wires from the terminal blocks. Failure to do so could cause permanent damage to the Phidget.

Related Videos

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 $95.00
SAF2000_0 $10.00

Bipolar Stepper Motors

The STC1002 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 426 RPM 12 V DC 5 mm 111.4 g
3321_0 $36.00 0.067° 14 kg·cm 120 RPM 12 V DC 6 mm 217.5 g 26 103121 : 1
3322_0 $38.00 0.018° 32 kg·cm 35 RPM 12 V DC 6 mm 243.6 g 99 10442057 : 1
3323_0 $16.00 1.8° 1.2 kg·cm 2150 RPM 12 V DC 5 mm 200 g
3324_0 $16.00 1.8° 3.3 kg·cm 2150 RPM 12 V DC 5 mm 289 g
3325_0 $40.00 0.35° 18 kg·cm 904 RPM 12 V DC 8 mm 457 g 5 211 : 1
3326_0 $42.00 0.13° 30 kg·cm 295 RPM 12 V DC 8 mm 502 g 13 212289 : 1
3327_0 $44.00 0.067° 30 kg·cm 174 RPM 12 V DC 8 mm 503 g 26 103121 : 1
3328_0 $46.00 0.035° 48 kg·cm 63 RPM 12 V DC 8 mm 564 g 50 43974913 : 1
3329_0 $48.00 0.018° 48 kg·cm 34 RPM 12 V DC 8 mm 564 g 99 10442057 : 1
3330_0 $28.00 0.9° 11.2 kg·cm 2150 RPM 12 V DC 14 695 g
3331_0 $20.00 1.8° 11 kg·cm 2150 RPM 12 V DC 14 686 g
3332_0 $70.00 0.42° 46.6 kg·cm 375 RPM 12 V DC 12 mm 1.2 kg 4 14 : 1
3333_0 $72.00 0.12° 150 kg·cm 116 RPM 12 V DC 12 mm 1.3 kg 15 310 : 1
3334_0 $74.00 0.023° 240 kg·cm 25 RPM 12 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
3336_0 $80.00 1.8° 106 kg·cm 1500 RPM 30 V DC 58 5.2 kg
3340_0 $20.00 0.9° 3.3 kg·cm 2344 RPM 12 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)
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

Power Supplies

This Phidget requires a power supply between 10 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 Voltage Min Power Supply Voltage Max Power Supply Current Wall Plug Style
3022_0 $10.00 11.4 V DC 12.6 V DC 2 A Australian
3023_1 $10.00 11.4 V DC 12.6 V DC 2 A European
3024_1 $10.00 11.4 V DC 12.6 V DC 2 A North American
3025_0 $10.00 11.4 V DC 12.6 V DC 2 A British
3084_0 $1.50 11.4 V DC 12.6 V DC 500 mA European
3085_0 $1.50 11.4 V DC 12.6 V DC 500 mA North American
3086_0 $10.00 22.8 V DC 25.2 V DC 1 A North American
PSU4013_0 $20.00 22.8 V DC 25.2 V DC 2.5 A
PSU4014_0 $40.00 22.8 V DC 25.2 V DC 5 A
PSU4015_0 $20.00 21.6 V DC 26.4 V DC 1 A
PSU4016_0 $40.00 21.6 V DC 28.8 V DC 15 A
PSU4017_0 $75.00 20 V DC 26.4 V DC 15 A
PSU4018_0 $20.00 11.4 V DC 12.6 V DC 5 A

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

Getting Started

Welcome to the STC1002 user guide! In order to get started, make sure you have the following hardware on hand:

Next, you will need to connect the pieces:

STC1002 Functional.jpeg
  1. Connect the STC1002 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.

Now that you have everything together, let's start using the STC1002!

Using the STC1002

Phidget Control Panel

In order to demonstrate the functionality of the STC1002, 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 STC1002.

First Look

After plugging the STC1002 into your computer and opening the Phidget Control Panel, you will see something like this:

STC1002 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.

Stepper Motor

Double-click on the Stepper object, labelled Stepper Phidget, in order to run the example:

STC1002 Stepper Example.jpg

General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:

  • Toggle the Engage button to provide power to the motor coils.
  • By default, motor position, velocity, and acceleration are measured in sixteenths of a step. If you want to use different units, change the value in the Rescale Factor textbox.
  • Use the Target Position slider to set a new target position. Change the Acceleration and Velocity sliders to speed up or slow down the STC1002's approach.
  • Select the Velocity (Continuous) Control tab for continuous rotation instead of specifiying a position.

Finding The Addressing Information

Before you can access the device in your own code, and from our examples, you'll need to take note of the addressing parameters for your Phidget. These will indicate how the Phidget is physically connected to your application. For simplicity, these parameters can be found by clicking the button at the top of the Control Panel example for that Phidget.

The locate Phidget button is found in the device information box

In the Addressing Information window, the section above the line displays information you will need to connect to your Phidget from any application. In particular, note the Channel Class field as this will be the API you will need to use with your Phidget, and the type of example you should use to get started with it. The section below the line provides information about the network the Phidget is connected on if it is attached remotely. Keep track of these parameters moving forward, as you will need them once you start running our examples or your own code.

All the information you need to address your Phidget

Using Your Own Program

You are now ready to start writing your own code for the device. The best way to do that is to start from our examples:

This Phidget is compatible with the Stepper Examples.

Once you have your example, you will need to follow the instructions on the page for your programming language to get it running. To find these instructions, select your programming language from the Software Overview page.

Technical Details

Rescale Factor

Further Reading

For more information, have a look at the Stepper Motor and Controller Primer.

What to do Next

  • Software Overview - Find your preferred programming language here and learn how to write your own code with Phidgets!
  • Phidget22 API - The API is a universal library of all functions and definitions for programming with Phidgets. Just select your language and device and it'll give you a complete list of all properties, methods, events, and enumerations that are at your disposal.

Product Specifications

Board Properties
Controlled By VINT
Controller Properties
Motor Type Bipolar Stepper
Number of Motor Ports 1
Motor Position Resolution 116 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 8 A
Supply Voltage Min 10 V DC
Supply Voltage Max 30 V DC
Current Consumption Min 50 mA
Current Consumption Max 7 A
Current Consumption Min (VINT Port) 500 μA
Current Consumption Max (VINT Port) 1 mA
Quiescent Power Consumption Max * 200 mW
Physical Properties
Recommended Wire Size 10 - 12 AWG
Operating Temperature Min -20 °C
Operating Temperature Max 85 °C

* Power consumption varies based on supply power. See the technical section of the User Guide for details.

Software Objects

Channel NameAPIChannel
Bipolar Stepper Controller Stepper 0


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Library & Driver Downloads

Code Samples


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


Product History

Date Board Revision Device Version Comment
September 20180200Product Release

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
STC1000_0 $75.00 116 Step (40-Bit Signed) 1 1/16 steps/sec 115000 1/16 steps/sec 4 A
STC1001_0 $40.00 1/16 Step (40-Bit Signed) 1 1/16 steps/sec 115000 1/16 steps/sec 2.5 A
STC1002_0 $80.00 116 Step (40-Bit Signed) 1 1/16 steps/sec 115000 1/16 steps/sec 8 A