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>
WARNING
