Author - Ligo George

Servo Motor

Servo Motor

Introduction Servo Motors are ordinary geared down DC Motors equipped with servo mechanism for precise control of angular position. A servomechanism or servo refers to an error sensing negative feedback which is used to correct the performance of a device. Servos are used for precise positioning in robotic arms, legs, RC Aeroplanes, Helicopters etc. Servo Motors do not rotate continuously, their rotation is limited between fixed angles. Usually these motors have rotation limit from 90° to 180° and some special have limit 360° or more. An ordinary...

June 16, 2012By Electronics, 2 CommentsRead more...
Stepper Motor or Step Motor

Interfacing Stepper Motor with PIC Microcontroller

Introduction A Stepper Motor is a brushless, synchronous DC electric motor, which divides the full rotation into a number of equal steps. It finds great application in field of microcontrollers such as robotics. Please refer the article Stepper Motor or Step Motor for detailed information about working of stepper motor, types and modes of operation. Unipolar Motor is the most popular stepper motor among electronics hobbyist because of its ease of operation and availability. Here I explaining the working of Unipolar and Bipolar Stepper Motor...

June 14, 2012By MikroC, PIC Microcontroller, Tutorials, , , 28 CommentsRead more...
Stepper Motor or Step Motor

Stepper Motor or Step Motor

Introduction to Stepper Motor It is a brushless, synchronous DC electric motor, which divides the full rotation into a number of equal steps. It is also known as Step Motor. For example, in the case of a 200 step motor, one complete rotation (360°) is divided in to 200 steps, which means one step is equal to 1.8°. It can take only one step at a time and each steps are equal. The exact position of a stepper motor can be controlled...

June 13, 2012By Electronics, 2 CommentsRead more...
Matrix Keypad

Reading Multiple Pressed Keys from Matrix Keypad using PIC Microcontroller

I have already post about Interfacing Matrix Keypad with PIC Microcontroller. I suggest to read that article before reading this. In some applications it may require to scan more than one key at a time. Reading Multiple Pressed Keys from Matrix Keypad is not simple as reading Single key. We want to change the program as well as the circuit of matrix keypad for reading multiple keys. The main problem is unexpected shorts may come to act when we press more...

June 11, 2012By MikroC, PIC Microcontroller, Tutorials, , , , 21 CommentsRead more...
Matrix Keypad

Interfacing Matrix Keypad with PIC Microcontroller

This tutorial explains 'What is a Matrix Keypad ?' and 'How to Interface Matrix Keypad with PIC Microcontroller ?'. Matrix Keypad Matrix Keypad is a very useful and userfriendly when we want to design certain applications like Calculator, Telephone etc. Matrix Keypad is made by arranging push button switches in rows and columns. Just imagine, if you want to interface a 4*4 (16 keys) matrix keypad with a microcontroller.  In the straight forward way, you will need 16 pins of a microcontroller for that, but...

June 10, 2012By MikroC, PIC Microcontroller, Tutorials17 CommentsRead more...
dc motor

Interfacing DC Motor with PIC Microcontroller using L293D

This tutorial explains " How to interface DC Motor with PIC Microcontroller ? ". DC Motor and L293D We can't drive a DC Motor (depends) directly with a Microcontroller, as DC Motors requires high current and high voltage than a Microcontroller can handle. Microcontrollers usually operates at +5 or +3.3V supply and it I/O pin can provide only up to 25mA current. Commonly used DC Motors requires 12V supply and 300mA current, moreover interfacing DC Motors directly with Microcontrollers may affect the...

June 5, 2012By MikroC, PIC Microcontroller, Tutorials, , , 141 CommentsRead more...
rfid tag

RFID : Radio Frequency Identification

What is RFID or Radio Frequency Identification ? How it Works ? Radio Frequency Identification is a term that used to describe a wireless system that used for Automatic Identification and Tracking, it uses Radio Frequency electromagnetic fields to transfer data from tag attached to an object. Unlike UPC (Universal Product Code) Bar Code, this technology doesn't need line of sight communication and it can be read through clothing, human body or any non metallic materials. Therefore it is an excellent replacement for UPC...

June 4, 2012By Electronics, 1 CommentRead more...
Digital Thermometer using PIC Microcontroller and LM35

Digital Thermometer using PIC Microcontroller and LM35 Temperature Sensor

Basics A Digital Thermometer can be easily constructed using a PIC Microcontroller and LM35 Temperature Sensor. LM35 series is a low cost and precision Integrated Circuit Temperature Sensor whose output voltage is proportional to Centigrade temperature scale. Thus LM35 has an advantage over other temperature sensors calibrated in Kelvin as the users don't require subtraction of large constant voltage to obtain the required Centigrade temperature. It doesn't requires any external calibration. It is produced by National Semiconductor and can operate over a -55 °C to 150 °C...

June 1, 2012By Embedded, PIC Microcontroller, Projects, , , , 116 CommentsRead more...
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