- #L293d motor driver circuit diagram with arduino how to#
- #L293d motor driver circuit diagram with arduino serial#
#L293d motor driver circuit diagram with arduino serial#
In order to control the steps, we will use the serial monitor. In order to increase the resolution (double the resolution), we will use half step excitation and achieve 400 step count. The image below demonstrates an 8 step “Half Stepping” excitation method.Īs mentioned earlier, the step angle of the motor used in this project is 1.80 i.e. So, with half stepping, we can get double the resolution with along with smoother operation.
This is a combination of one phase and two phase excitation. There is another technique called Half Stepping. The following image shows a 4 step based operation of one phase and two phase excitation methods. With this technique, the step count doesn’t vary from the one phase excitation but the torque and speed is significantly increased.īut the disadvantage is it requires twice the power. Two phase stepper excitation is another technique where two phases are energised at a time. energising only one phase at a time, we can achieve the normal 200 step rotation with least power consumption. The motor used in this project has 200 step count. In order to drive the stepper motor, we will be using a technique called “Half Stepping”. These 4 wires are connected to the output pins of the L293D Motor Driver IC. Since it is a bipolar motor, there are only 4 wires corresponding to the end terminals of two coils. The stepper motor used in this project is a Bipolar PMH (Permanent Magnet Hybrid) type Stepper Motor. The working of the project is explained here. Working of the ProjectĪ simple Stepper Motor Control using Arduino UNO and L293D Motor Driver IC is designed in this project. Alternatively, we can control the steps or rotation of the motor with the help of analog input via a potentiometer. So, make sure that the RX and TX pins of the Arduino are not used as digital I/O. The control of steps is done with the help of computer using serial monitor. Wrong power supply would permanently damage the motor. Understand the power requirements of your stepper motor and provide necessary power supply. So connect them to any of the 4 digital I/O pins (here, we connected them to pins 2, 3, 4 and 5 of Arduino UNO). The 4 inputs of the L293D Motor Diver IC are given from Arduino UNO. So, connect the two wires from one coil to outputs 1 and 2 of L293D and the other two wires from second coil to outputs 3 and 4. Since it is a bipolar stepper motor, there are only 4 wires we need to connect.
Hence, we used the Motor Driver IC L293D, which is an H – bridge type driver. In this project, we have used a bipolar stepper motor.
#L293d motor driver circuit diagram with arduino how to#
How to Design Stepper Motor Control Circuit?
The most common step angle or step count for stepper motors is 1.8 0 or 200 steps (both of them are same as 1.8 0 x 200 = 360 0). The following image shows a bipolar stepper motor, a 6 – wire unipolar stepper motor and a 5 – wire unipolar stepper motor. But in case of a bipolar stepper motor, we need to implement an H – bridge type driver like L293D Motor Driver IC. This is because, the driving method for each of these stepper motors is different from the other.įor instance, the driver circuit of a unipolar stepper motor can be implemented with simple transistor based circuit or a Darlington Transistor IC like ULN2003A. We will not go into the details of the types of stepper motors but it is important to identify whether your stepper motor is a bipolar or unipolar one. Based on the winding of the stator, stepper motors can also be classified as Bipolar Stepper Motors and Unipolar Stepper Motors. When each phase is energised in sequence, the rotor of the stepper motor rotates in steps.īasically, there are three types of stepper motors: Variable Reluctance (VR) Stepper Motors, Permanent Magnet (PM) Stepper Motors and Hybrid Stepper Motors. Due to their unique design, stepper motors can be controlled for precise positioning without any feedback.Ī typical stepper motor has multiple coils that are divided into phases. Power Supply (suitable for your stepper motor)Īs mentioned earlier, a Stepper Motor is a type of DC Motor that rotates in discrete steps.How to Design Stepper Motor Control Circuit?Ĭircuit Diagram of Stepper Motor Control using Arduino Components Required.Circuit Diagram of Stepper Motor Control using ArduinoComponents Required.