How to determine the stepper motor wiring? I use the following trick to determine how to connect 4 wire bipolar stepper motors: The only thing you need to identify is the two pairs of wires which are connected to each of the two coils. To find the two wires from one coil, do the following with the motor disconnected: Try to spin the shaft of the stepper motor by hand and notice how hard it is to turn. Now pick a random pair of wires from the motor and touch the bare ends together.

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First connect each motor to the A and B connections on the LN module. Otherwise you may need to swap them over when you set both motors to forward and one goes backwards! If you supply is up to 12V you can leave in the 12V jumper point 3 in the image above and 5V will be available from pin 6 on the module. Now you will need six digital output pins on your Arduino, two of which need to be PWM pulse-width modulation pins.

Finally, connect the Arduino digital output pins to the driver module. Then connect D10 to module pin 7 remove the jumper first and D5 to module pin 12 again, remove the jumper. However the motors will not turn until a HIGH is set to the enable pin 7 for motor one, 12 for motor two. And they can be turned off with a LOW to the same pin s. However if you need to control the speed of the motors, the PWM signal from the digital pin connected to the enable pin can take care of it. Two DC motors and an Arduino Uno are connected as described above, along with an external power supply.

In the function demoOne we turn the motors on and run them at a PWM value of To get an idea of the range of speed possible of your hardware, we run through the entire PWM range in the function demoTwo which turns the motors on and them runs through PWM values zero to and back to zero with the two for loops. Finally this is demonstrated in the video on this page — using our well-worn tank chassis with two DC motors. Add Tip.


Controlling DC Motors with Arduino | Arduino L298N Tutorial



Control a stepper motor with L298N motor driver and Arduino


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