Here's what you need to know to make this gadget work:Pins:Vcc | Vcc (compatible with 3.3v or 5v power)PWM1 | PWM2 (PWM input for motors 1 and 2)INA1 | INA2 (motors 1 and 2 control...

Here's what you need to know to make this gadget work:

Pins:
Vcc | Vcc (compatible with 3.3v or 5v power)
PWM1 | PWM2 (PWM input for motors 1 and 2)
INA1 | INA2 (motors 1 and 2 control logic input A)
INB1 | INB2 (motors 1 and 2 control logic input B)
GND | GND

Run logic:
INAx low, INBx low - motor stopped
INAx low, INBx high - motor forward
INAx high, INBx low - motor reverse

State LED:
Steady light: normal operation; fast flashing; power supply overvoltage, output is off;
slow flashing: power supply undervoltage, output is off; double flashing: drive overheating, output is off;

Sample code:

/*
This sample code is for testing the 2 stepper motors
The rotation velocity can be adjusted by the code switch
Microcontroller: Arduino UNO
*/
int PWM1 = 2;
int INA1 = 3;
int INB1 = 4;
int PWM2 = 5;
int INA2 = 6;
int INB2 = 7;
void setup()
{
pinMode(PWM1, OUTPUT);
pinMode(INA1, OUTPUT);
pinMode(INB1, OUTPUT);
pinMode(PWM2, OUTPUT);
pinMode(INA2, OUTPUT);
pinMode(INB2, OUTPUT);
}
void loop()
{
digitalWrite(INA1, LOW);
digitalWrite(INA2, LOW);
digitalWrite(INB1, HIGH);
digitalWrite(INB2, HIGH);
analogWrite(PWM1, 255); //PWM Speed regulation
analogWrite(PWM2, 255); //PWM Speed regulation
delay(1000);
digitalWrite(INA1, LOW);
digitalWrite(INB1, HIGH); //Motor 1 forward
digitalWrite(INA2, HIGH);
digitalWrite(INB2, LOW); //Motor 2 reverse
analogWrite(PWM1, 255); //PWM Speed regulation
analogWrite(PWM2, 255); //PWM Speed regulation
delay(1000);
digitalWrite(INA1, LOW);
digitalWrite(INB1, LOW); //Motor 1 stopped
digitalWrite(INA2, LOW);
digitalWrite(INB2, LOW); //Motor 2 stopped
analogWrite(PWM1, 255);
analogWrite(PWM2, 255);
delay(1000);
}