# KS0379 Keyestudio 3D Printer DRV8825 Kit (5PCS)

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## 1. Introduction

This stepper motor driver is powered by DRV8825.

This driver has a same pin and interface as our A4988 stepper motor driver, so it can replace the A4988 driver. It is a high-powered stepper motor driver.

DRV8825 has adjustable current limits, over-current and over-heat protection, six micro resolution (down 1/32-step).

It uses 8.2-45V and can provide up to approximately 1.5 per phase without heat sink or forced air flow (rated up to 2.2 with adequate additional cooling per coil)

## 2. Specifications

1. With only simple step and direction control interface;
2. Six different step modes: full, half, 1/4, 1/8, 1/16, and 1/32;
3. Adjustable potentiometer can adjust the maximum current output, resulting in a higher step rate;
4. Automatic current decay mode detection / selection;
5. Overheat shutdown circuit, under voltage lockout, cross current protection;
6. Ground short circuit protection and load short circuit protection.

## 3. Settings for working mode

![](media/wps2.png)

## 4. Connection Diagram

It needs to connect DC 8-15V between motor power VMOT and GND.

![](media/wps3.jpg)

## 5. Sample Code

Download code : [Code](./Code.7z)

```c
int dirPin = 7;
int stepperPin = 8;

void setup() 
{
    pinMode(dirPin, OUTPUT);
    pinMode(stepperPin, OUTPUT);
}

void step(boolean dir,int steps)
{
    digitalWrite(dirPin,dir);
    delay(50);
    for(int i=0;i<steps;i++)
    {
        digitalWrite(stepperPin, HIGH);
        delayMicroseconds(800);
        digitalWrite(stepperPin, LOW);
        delayMicroseconds(800);
    }
}

void loop()
{
    step(true,1600);
    delay(500);
    step(false,1600*5);
    delay(500);
}
```

## 6. Test Result

The selection end MS1, MS2, MS3 of three modes are all connected to GND, that is, full-step mode, and the motor needs 200 stepping values or a stepping 1.8° to turn a round. In the experiment, we first let the stepper motor reverse 8 circles and delay 0.5 seconds; then turn 40 circles and delay 0.5 seconds. If it is an half-step mode, then the number of both positive and reverse circle should be halved.

## 7. Package Included

- Keyestudio 3D Printer DRV8825 *5PCS

![](media/wps4.png)