DC Motor Phidget

£91.80 £76.50

Control one high-current brushed DC motor with this powerful Phidget. The encoder input and analog input can enable precise control motor velocity and position.


This DC Motor Phidget attaches to your VINT hub and controls the direction and voltage of one DC motor using high frequency pulse-width modulation to achieve smooth operation. It also has current control, allowing you to set a current limit, which puts a maximum on the amount of torque exterted by the motor and allows you to use larger power supplies than what the motor is normally rated for.

Quadrature Encoder Input

This controller comes equipped with an encoder input that can read in the quadrature signal from an encoder attached to the shaft of your motor. You can use this information to make a closed-loop position controller.

VoltageRatio Input

Similar to a VINT port opened in VoltageRatioInput mode, this port will read in a ratiometric sensor. This is useful for motors that come with attached potentiometers like a DC Linear actuator, so you can incorporate position feedback without needing to buy another input board.

High Compatibility

Many variations of brushed DC motors exist: permanent magnet motors, electromagnet motors, coreless motors, and linear motors. The DC Motor Controller can be used with any of these, as well as other devices that use pulse-width modulation such as small solenoids, incandescent light bulbs, and the hydraulics of pneumatic devices like small pumps and valves.

Motor Current Sensing

This Phidget also lets you monitor how much current is going through your motor coils at any given time. You can use this feature to determine how much physical resistance the motor is working against; the larger the load, the greater the current the motor will draw.

Reliability and Protection

The VINT port on this device is isolated, greatly improving reliability and eliminating ground loops.

The power terminals on this device are polarity protected: if you happen to hook up the power supply backwards, the device simply won't power up and won't be damaged.

There is a fuse included on-board to protect the controller in an over-current event. Board temperature and motor current can be monitored for cooling control and power management. This board has no power-saving features built in; if you want to control power consumption, you'll need to switch the power supply using a relay. The attached fan can be configured and automatically or manually controlled through the API.

Board Properties

Controlled By


Voltage Sensor

Number of Voltage Inputs


Sampling Interval Min

500 ms/sample

Sampling Interval Max

60 s/sample

VoltageRatio Input Resolution


Input Voltage Min (DC)

0 V DC

Input Voltage Max (DC)

5 V DC

Measurement Error Max

0.5 %

Sensor Input Impedance

324 kΩ

Controller Properties

Motor Type

DC Motor

Number of Motor Ports


Velocity Resolution

0.001 % Duty Cycle

Acceleration Resolution

1 % Duty Cycle/s

Acceleration Min

0.5 % Duty Cycle/s

Acceleration Max

10000 % Duty Cycle/s

Acceleration Time Min

10 ms

Acceleration Time Max

200 s

PWM Frequency

25 kHz

Sampling Interval Min

50 ms/sample

Sampling Interval Max

60 s/sample

Current Limit Resolution

17.9 mA

Electrical Properties

Continuous Motor Current Max

25 A

Supply Voltage Min

8 V DC

Supply Voltage Max

30 V DC

Current Consumption (Unconfigured)

(VINT Port) 500 μA

Current Consumption Max

(VINT Port) 2 mA

Power Consumption (Unconfigured)

288 mW

Power Consumption

motor power plus 700 mW

Encoder Interface

Number of Encoder Inputs


Encoder Interface Resolution


Count Rate Max

400000 pulses/s

Time Resolution

1 μs

Sampling Interval Min

50 ms/sample

Sampling Interval Max

60 s/sample

Encoder Input Low Voltage Max

800 mV DC

Encoder Input High Voltage Min

2 V DC

Temperature Sensor

Temperature Resolution

0.04 °C

Physical Properties

Recommended Wire Size

10 - 26 AWG

Operating Temperature Min

-40 °C

Operating Temperature Max

85 °C