Introduction: Control DC and Stepper Motors With L298N Dual Motor Controller Modules and Arduino. Stepper motors are everywhere in electronics these days. There are two main types of stepper motors: 1. Bipolar motors. These have two coils and are controlled. Arduino code // Motor Control Via Bluetooth Demo // By keuwlsoft: www.keuwl.com 4th Oct 2015 // cc Attribution-ShareAlike // This sketch controls two 28BYJ-48 stepper.
About this demo Two 28BYJ-48 Stepper motors are driven from ULN2003 units controlled from an Arduino Uno. An HC-06 Bluetooth module is included so that the motors can be controlled from an Android device running Keuwlsoft's. To make this demo a little more exciting, the two stepper motors have been connected to wheels, so that we are controlling a small car. Note that speeds are slow, very slow, so use large wheels. Stepper motors are great if accuracy in position is required. If speed is required, an ordinary motor will be better. This example demonstrates the accelerometer and pad controls in the 'Bluetooth Electronics' app, showing how they can be interfaced to your electronic circuits via Bluetooth.
If the accelerometer control switch is on, then tilting the Android device will control the car motion. If switched off, then either of the two pad controls will make the car move. The pad on the left will allow operate car motion at maximum speed, whereas the pad on the right will allow the car to move at varying speeds. The 4 buttons are control 4 LEDs on the car, although these could be omitted or swapped for some other effect if preferred. 28BYJ-48 Stepper Motors and the ULN2003 Driver. 28BYJ-48 Stepper Motor and ULN2003 Driver These are small cheap unipolar motors. The can operate up to approx 15RPM and have a decent torque.
In full (8 step) mode, there are 4096 (approx) steps per revolution, although we are using the Arduino 'stepper.h' library and operating it in 4 step mode. Thus there are 2048 steps per revolution. The motor is internally geared at a ratio of 64. Each step will turn the internal rotor 5.625° (or 11.25° in 4 step mode).
There are 5 connections, Red being the common, and the other four colours connected to the ends of the solenoids in the motor, with Blue (A), Pink (B), Yellow (C) and Orange (D) connected to the UNL2003 driver circuits which has corresponding LEDs labelled A to D. Uniblue Registry Cleaner Kit Serial Key 2014. The UNL2003 is used so that sufficient current can be drawn to drive the motor and protect the digital circuit from any back emfs. The UNL2003 consists of an array of 8 Darlington transistor pairs suitable for switching inductive loads. These often come on a circuit board with connector socket for the motor and LEDs to indicate the switching state making it easier for debugging and prototyping. Components used. The Bluetooth modules have 4 connections, GND, 5V, RX and TX.