Monday, 18 February 2019


Asterisk is an open source software to use for the communication app. Its run on Linux(Ubuntu, CentOS etc), Its is created by Digium, Inc.
Asterisk is providing you real-time connectivity on both PSTN and VOIP networks. Asterisk is useful to learn all about PBX(Private Branch Exchange), it needs no additional hardware, you can use a softphone (Zoiper, blink etc),
Asterisk provides you Voice call, Voice mail, messaging and call conference etc, Its has support for SIP, H.323, IAX and ADSI

Lets start with Asterisk.

Tuesday, 18 September 2018

Monday, 27 August 2018

Half Adder using VHDL

What is adder:
The adder is a device that can add binary numbers, it can use for the addition of binary numbers, binary code decimal, address decoding and table index calculation, There are two types of adders.

  1. Half Adder 
  2. Full Adder

Half adder:
A half adder is a computational circuit which is used to add two binary numbers, it is the made by one XOR and one AND gate, it has two input (A, B) and two output (sum, carry).

Truth Table of half adder: