GK-MMO-ULN2003 geeekus ULN2003 Stepper Motor Driver Board for 28BYJ-48

The geeekus ULN2003 stepper motor driver board is a high quality compact module which allows you to control the 28BYJ-48 stepper motor.

Because the 28BYJ-48 stepper motor consumes a significant amount of power, it cannot be controlled directly by a microcontroller like the Arduino. To control the motor, a driver IC such as the ULN2003 is required.

Features of 28BYJ-48 Stepper Motor:

• The rotation angle of the motor is proportional to the input pulse.
• The motor has full torque at standstill(if the windings are energized)
• Precise positioning and repeatability of movement since good stepper motors have an accuracy of – 5% of a step and this error is non cumulative from one step to the next.
• Excellent response to starting/stopping/reversing.
• Very reliable since there are no contact brushes in the motor. Therefore the life of the motor is simply dependant on the life of the bearing.
• The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.
• It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.
• A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.

Stepper motor 28BYJ-48 Parameters:

• Model: 28BYJ-48
• Rated voltage: 5VDC
• Number of Phase: 4
• Speed Variation Ratio: 1/64
• Stride Angle: 5.625° /64
• Frequency: 100Hz
• DC resistance: 50Ω±7%(25℃)
• Idle In-traction Frequency: > 600Hz
• Idle Out-traction Frequency: > 1000Hz
• In-traction Torque >34.3mN.m(120Hz)
• Self-positioning Torque >34.3mN.m
• Friction torque: 600-1200 gf.cm
• Pull in torque: 300 gf.cm
• Insulated resistance >10MΩ(500V)
• Insulated electricity power: 600VAC/1mA/1s
• Insulation grade: A
• Rise in Temperature <40K(120Hz)
• Noise <35dB(120Hz,No load,10cm)

Connection for Arduino UNO:

Connection for Arduino Mega:

Sample Code:

#include <stepper.h>   
#define STEPS 100  
Stepper stepper(STEPS, 8, 9, 10, 11);  
int previous = 0;  
void setup()
{
  stepper.setSpeed(90);
 }   
 void loop()
 {    
   int val = analogRead(0);      
   stepper.step(val - previous);     
   previous = val;
 }
</stepper.h>