Rotary Encoder Interfacing with PIC Mirocontroller

       i am currently working with some power supply design and i can say using conventional pots(potentiometer)  and rotary  switch  to adjust the voltage and other stuff is quite old school. so i have decided to go for a bit high tech , actually bit digital.

so here is the solution

Incremental Rotary Encoder

first of all i would like to tell you , these type of rotary encoder is totally digital component so you can't directly replace these  with you conventional pots. so lets start what are Incremental Rotary Encoder , Incremental rotary encoders by the looks of it just like a general purpose pot looks like but output is quite different they  provide a pair of digital signals that allow a microcontroller to determine the direction of a shaft’s rotation. They can be used to monitor motors and mechanisms, or to provide a control-knob user interface.

   for a quick look here is a typical incremental rotary encoder

ST7565 LCD Interfacing with MSP430 microcontroller

Displaying content on a normal alphanumeric display is very limited ,we have to be limited with the font size and we can't draw any graphics also. but convention Graphics lcd are really very expensive so here is the solution, you can use ST7565 monochrome  LCD to display your large font text and graphics . the reason behind using this LCD is ,it is really very cheap and can be powered with 3 volts supply. so it is really good for battery powered application.

Project Description 

       however you can use almost any microcontroller to display content on this LCD, may be that micro controller is PIC , AVR or MSP430 , but in this demonstration we will be using Microchip MSP430G2211 Microcontroller from Texas Instrument .

Atmel AVR ATMega16 Interfacing WIth 16x2 char LCD

    An alphanumeric low cost LCD Display is very essential for may small and big projects to Display various type of information. Hitachi HD44780  Chipset based 16x2 char LCD is Really very cheap and easily available in the local market.

Project Description:-

  In this project we are going to learn various things about this chip set and displaying text on this LCD. The HD44780 16x2 char LCD screen Use 4 bit parallel interface with backlight.

This Primary Objective in this project are:-

1.  Displaying  "Hello Word!! LCD " message on the scree.
2.   Interfacing The LCD to the Microcontroller Using  4 Bit Mode.
3.  Generating and Displaying Custom Char on the LCD Screen. clik here for custom char

FOR SALE::: SMD Breakout Board For SMD Prototype

 FOR SALE

DOWNLOAD HIGH RESOLUTION IMAGE  Click Here  (10.6 MB)

IR(infrared) Remote Control Relay Board with PIC 12F675 Microcontroller

Introduction          

        This little project will demonstrate how you can use your old NEC IR protocol based TV,DVD or VCR remote control to control you home appliances like fan bulb or virtually anything.

Consumer IR protocols    
    There are a number of consumer Infrared protocols out there and they have been used for every single purpose possible i guess, like PDA laptops and other consumer appliances. RC-5 & RC-6 by Phillips , RCA are few examples of consumer IR protocols.

       In this demonstration we will stick the to NEC protocol by NEC corporation,

NEC Infrared Protocol 

800KHz 3 Channel PWM Meter "Duty Cycle Meter"

Introduction

  After working with some motor control application i found that a multi channel PWM or Duty Cycle Meter is a quite help full to debug those PWM based motor control circuits and RGB LED control PWM using PWM which has at least 3 PWM line ,so i decided to build one for my self. 

   This is Meter has total 3 channels with all can accept frequency up 800Khz. the accuracy of the meter is quite good.

The SCHEMATIC 

PIC MCU LCD Driver 4 commmon 7 Segmented LCD & PIC16F917

  Now a days almost all the mcu projects use a normal 16x2 char LCD or the LED  to display the data, but the problem with those 16x2 LCD and LED is , they consumes a lot of power , they are very thick  , bulky and the font size is really very small , and if you go for a big font size then they are really very expensive  and some times we just don't want that may lines and character , what we want is just a 3 - 4 digit numbers and a big display font size.

 so  here is a quick tutorial on how to use a microchip pic mcu to drive an 4 common 7 segment lcd .

Prototype

TYPES OF SEGMENTED(controller les "RAW")  LCD

     These type of LCD have no controllers built in all they are is just a liquid crystals sandwiched between to pieces of glass and sometimes a reflective plate at the back. The LCD who have that plate on the back (like my LCD has) called reflective and the LCD who don't have those plate looks quite a transparent called Transreflective.

There is another criteria for classification of the raw lcd glasses

Non Multiplexed (single Common) ( STATIC )