Using Arduino Interrupt

This is small information about Interrupts in Arduino.

The Arduino board has two interrupts.

Syntax:

attachInterrupt(interrupt, function, mode);

interrupt 0- Arduino digital pin 2

interrupt 1- Arduino digital pin3

in function give which function to call
in mode give HIGH or LOW on which the interrupt need to be activated


Cheers,
Balaji

 

How to create a custom page in Prestashop?

Log in your Prestashop and click tools at the top right.

 
 

In the next line click CMS there you can edit the static pages in your site.

How to create an user in MediaWiki?

Log in your MediaWiki and click Special Pages at the bottom left of the screen.

 
 

Then click Log in / create an account and create a new MediaWiki account.

Using Functions as Arrays

This is a C code for using functions as arrays.

We use array of function pointers. Here is sample code

  // array of functions
  #include

  // -- FUNCTION PROTOTYPES --
  void func1();
  void func2();
  void func3();
  void func4();
  void func5();
  // -- ENDS --

  void main()
  {
   // notice the prototype
   void (*ptr[5])();

   // arrays are made to point
   // at the respective functions
   ptr[0]=func1;
   ptr[1]=func2;
   ptr[2]=func3;
   ptr[3]=func4;
   ptr[4]=func5;

   // now the array elements
   // point to different functions
   // which are called just like
   // we access the elements of
   // an array
   for(int i=0;i<5;i++)
     (*ptr[i])();
  }

  // -- FUNCTIONS DEFINITION --
  void func1()
  {
   cout<<"Called Func1!\n";
  }

  void func2()
  {
   cout<<"Called Func2!\n";
  }

  void func3()
  {
   cout<<"Called Func3!\n";
  }

  void func4()
  {
   cout<<"Called Func4!\n";
  }

  void func5()
  {
   cout<<"Called Func5!\n";
  }
  // -- ENDS --

74HC595

IC PACKAGING :

FOOTPRINT:

Footprint refers to the physical layout that is required on the printed circuit board in order to mount a component or physical attachment.

SOCKET:

Socket is nothing but attachment the printed circuit board 

PACKAGING:

Final stage in semiconductor device fabrication or simply device assembly.

 

TYPES OF PACKAGES:

• Surface mount package.
  
• Through hole package.
  
• Contactless Packages.        
  

                            

Surface Mount Package:

Surface mount package is the IC packaging technique, in which the compounds are mounted on the Printed Circuit Board(PCB).Devices mounted on this technique are called Surface Mounted Devices(SMD).Technique is called Surface Mount Technique(SMT).

TYPES OF SMT:

There are different types SMD packagings, but in this we are seeing only few. Based on the materials

• Ceramic
  
• Plastic
  
• Metal
  

 

 

 

QFP (Quad Flat Package) is a type of SMT having leads on the four sides.

 

Many versions of QFP are there, in this LQFP and TQFP are very special.LQFP stands for low profile QFP with leads on four sides ,numbering can done from anti clockwise from the point on the IC with pin spacing range from 0.4mm to 0.8mm.TQFP stands for Thin Quad Flat Package same as that of the QFP,with thin body(1.0mm)and have a standard lead footprint(2.0mm).

 

                LQFP                            TQFP            

SOIC(Small-Outline Integrated Circuit) is type of surface mount package with space requirement and thickness less than DIP(Dual In-line Package).                                                                        

 

 

THROUGH HOLE PACKAGE:

Through Hole is mounting scheme for electronic component that involves the use leads in the component.It provide a stronge mechanical bond when compared to surface mount.

 

 

 

There are different kinds of through hole package. DIP(Dual In-line Package) is a through hole package in which circuits can be packed densely compared to round packages.

Amplifier circuit for microphone

This is the circuit diagram for mic amplifier