Computer Logic Gates

In the modern days we have electronic devices everywhere around us, and appear in every shape or form some even there without we knowing it is an electronic. Coffee machine, vending machine, pizza vending machine, car sensor, road lights, personal computer, tablet, automatic doors and many many more which appear as a more obvious as a electronic device. Less obvious devices are remote control, modern light switch, there are even wires called "smart wires" activate when needed only, how that even works?

But we have so much electronic around us, it is a must to understand the basics of these devices, how it work and how their logic in the process are. These are the very basic logic of the computing processes. These are called 'Logic Gates'.

AND Gate

Boolean Expression:
A ⋅ B = Q

Logic Diagram:

Truth Table[1]:

Chip Diagram:

NAND Gate

Boolean Expression:

(A ⋅ B)' = Q

Logic Diagram:

Truth Table[1]:

Chip Diagram:

OR Gate

Boolean Expression:

A + B = Q

Logic Diagram:

Truth Table[1]:

Chip Diagram:

NOR Gate
Boolean Expression:
A + B = Q

Logic Diagram:

Truth Table[1]:

Chip Diagram:

XOR Gate
Boolean Expression:
A ⊕ B = Q

Logic Diagram:

Truth Table[1]:

Chip Diagram:

Cite

Pictures:

- Picture taken by me

- AND, OR, NAND, NOR, XOR Gate symbol draw by myself using google draw.

[1] - IB SL Computer Science textbook chapter 4

- AND Gate chip diagram <http://www.gestialba.com/public/electronica/anagramas/eletacast004.jpg>

- NAND Gate chip diagram <http://www.dzsc.com/icstock/uploadfile/200942512456885.jpg>

- OR Gate chip diagram <http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/ietron/or3.gif>

- NOR Gate chip diagram <http://upload.wikimedia.org/wikipedia/commons/2/2a/NOR_Pinout.jpg>

- XOR Gate chip diagram <http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/ietron/xor6.gif>

Sources:

- IB Standard Level Computer Science Textbook Chapter 4

- http://en.wikipedia.org/wiki/Xor_gate

- http://en.wikipedia.org/wiki/Or_gate

- http://en.wikipedia.org/wiki/Nand_gate

- http://en.wikipedia.org/wiki/Nor_gate

- http://en.wikipedia.org/wiki/AND_Gate

Material used:

- 74SL08, AND Gate chip.  

- 74SL00, NAND Gate chip.  

- 74SLXX, OR Gate chip.  

- 74SLXX, NOR Gate chip.  

- 74SLXX, XOR Gate chip.

DISCLAIMER: This article are used for educational purpose only.