STSPIN820 Stepper Motor Driver Carrier with headers - Pololu 2879

Stepper motor driver based on the layout STSPIN820. Supply voltage from 7 V to 45 V with a maximum current consumption 0.9 A per coil without a heat sink (temporary up to 1.5 A). Maximum resolution: 1/256 step. Supports a single bipolar motor. Maybe a replacement chip A4988. Version wlutowanymi connectors.

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Price 34,90 zł


  • Driver: STSPPIN820
  • Supply voltage from 7 Volts to 45 Volts
  • Continuous current through the coil: 0.9 A
  • Maximum short-term current per coil: 1.5 A
  • Voltage digital logic supply from 2 V to 5.5 V
  • Resolution: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/128 and 1/256 step
  • Current limitation: the internal potentiometer
  • Protection against polarity reversal: no
  • Soldered contacts: Yes
  • Module dimensions: 20 x 15 mm
  • Weight: 1.4 g



The module is based on the driver STSPIN820 allows you to control a bipolar stepper motor with maximum current consumption of up to 0.9 A per coil without additional cooling (temporary up to 1.5 A). Is supplied with the voltage ranging from 7 V to 45 V. it is recommended to see the documentation of the driver STSPIN820. Below are some of the main features of the product:

  • The module has a simple control interface step and direction
  • Has the opportunity to work in 8 modes: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step 1/128 step 1/256 step
  • Provides control of maximum motor current via potentiometer, which allows the use of higher than rated voltage for motors, this results in higher execution speed steps
  • Engines can be supplied with a voltage from 7 V to 45 V
  • Current consumption 0.9 A (temporary 1.5 A)
  • Thanks to the built-in voltage regulator, you should not allow additional power logical parts.
  • STSPIN820 works with systems with a voltage of logic like 3.3 V and 5 V.
  • Has protection from excessive current and temperature, and short circuit
  • To increase the surface oddającej warmth tiles have been manufactured in technology czterowarstwowej with a thickened cap of copper
  • The open fields of the mass from the bottom allowing you to solder the cooling elements
  • The module corresponds, from the point of view of dimensions and insights to the system based on driver A4988

STSPIN820 - sterownik silnika krokowego 45V / 0,9A

The module has soldered contacts. In our offer also available in version without contacts.


Connection driver

To control a stepper motor bipolarnym it is necessary to connect the system in accordance with the following figure. The driver allows to work with some engines unipolarnymi, the details are in the instructions.

STSPIN820 - sterownik silnika krokowego 45V / 0,9A


One pulse on the specified pin STEP causing one step of the motor in the direction selected by making the appropriate logic state (high or low) to the output DIR. Contacts STEP and DIR are not internally pulled up. If the motor should only rotate in one direction the DIR pin can be permanently connected to VCC or GND.

In the model STSPIN820 two different ways to control the power mode, STBY / RESET and the EN / FAULT.

  • when the pin STBY is connected to low, the controller enters a low power mode and disables the output driver
  • pin ENABLE by default pulled low as including a module may also disable the output.

Driver STSPIN820 can detect errors by setting the lowest position of the pine trees EN/FAULT. The failure default to stay compatible with A4988 module. It can be obtained by connecting a jumper labeled F on the reverse side of the tile.

Driver for micro-step, as STSPIN820 allows engine operation with high resolution up to 1/256 step. The step size is selected via inputs MODE1, MODE 2 and MODE 3 modes are presented in the table below. By default, all three pins in the float mode, so they must be connected to VCC or GND.


LowLowLowFull step
HighLowLow1/2 step
LowHighLow1/4 step
HighHighLow1/8 step
LowLowHigh1/16 step
LowHighHigh1/128 step
HighHighHigh1/256 step



The chip can be powered with any voltage from 7 V to 45 V, connected between terminals VIN (+) and GND (-). The voltage must be filtered through the external capacitor placed as close as possible to the tile driver. Its capacity depends on the maximum current consumed by the motor.



In certain conditions, even a relatively low supply voltage may result in studs (surges) with a high amplitude, exceeding the allowed value of 45 V. This situation causes irreversible damage to the system. One way to avoid this problem is the placement of the capacitor (at least 47uF), as close as possible to the VIN and GND contacts of the controller.


The connection and disconnection of the engine while the driver is turned on can damage the system.


Current limit

To maintain high switching speed steps, you can use a higher motor supply voltage than nominal. You should only limit the maximum current flowing through the coil until the values of engine performance.


The module allows the active current limit with the potentiometer. One of the ways the introduction of restrictions to set the driver to full step and measuring the current passing through one coil without signal at the input STEP. The measured current is 100% of the established limit (both coils are always on and is limited to 100% of full step).


Another way is to measure the voltage on the VREF pin (marked with a circle on the PCB), and the calculation of the actual limit). The current limit can be calculated from the formula:

Current Limit = VREF ×5


The system includes the necessary passive components for the correct operation of the driver. The scheme of connection shown in the figures below.

STSPIN820 - sterownik silnika krokowego 45V / 0,9A


  • Voltage to 7.0 V
  • Voltage from 45 V
  • Current 0.8 A
  • Channels 1


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