Hello evilzoners...
Hope you are all fine and having a good time.
Wants to know how a Keyboard works? Here is it:-
A keyboard is a input device, with which we can send our data directly to computer.
A basic Keyboard have- typing keys, A numeric pad, function keys and control keys.The layout of typing keys of a keyboard is like that of the common typewriters.This layout is known as QUERTY. QUERTY for the first six letter on the Layout.Watch the first six letters of your typing keys.There are some legends about this layout. One legend says It was for slowing down the fast typists. Because when a typist would type the key rapidly then the printing arms would jam on the paper on which it was printing. And since then manufacturers had not changed this layout because of its popularity.Other legend is that it prevent the typist's arms to collapse with each other and make them feel less tired.There are several other layouts too. e.g. DVORAK layout;which has most common used keys at convenient places. Numeric pad consist of mathematcal operations such as +,-,/,* and number keys.
In The keyboard key there is a round cylindrical bar attached to the key. Underneath your keys there are three seperate plastic sheets. The upper layer plastic sheet and lower layer plastic sheet contains electrically conducting metallic tracks or simply electric connections (the dark grey lines on upper layer and light gery lines on lower layer).Between these two upper and lower layer there is a non conducting simple layer with holes in it, where on pressing the two upper and lower conducting layers meets together.This layer works to seperate the two layers. The circuit is called KEY MATRIX. The dots are the places where the keys press the two conducting layers together.Under these layer there is pieces of rubber, Which bounce back the key when you press them.There is the circuit is basically switched off.When you press the key the two lines or the layers meets together.The circuit is completed and a tiny amount of current flows.The microprocessor in the keyboard then detects the position of key you press
by comparing it to its Charater map.This map basically tells the x,y co-ordinates in the key matrix. Then the keyboard processor determines which character to send by analysing the signal(that current) and store all data in a buffer.Buffer size is 16 bit.The keyboard hence sends the data to your computer via its cable. Cable completes two purposes. Supply of current to keyboard and transfer of data.The cable is connected to your computer's port.The port is monitored by computer's keyboard controller which is basically an integrated circuit (IC).IC processes all data coming from keyboard and sends it to operating system. Most common keyboard connectors are USB type or PS/2 type. Thanks for reading.
For a second there,
I thought this post was going to be like:
"Okay, first of all, you plug in your keyboard. Done it yet? No, no, no Jerry! Not there!
Okay, class, let's continue...don't look at him...when you press a button, you see a symbol pop up.
The button you press corresponds with the symbol.
Yes, Rachel? ...What does "corresponds" mean? Google it. Okay, moving on..." Ect.
Instead it was very informative (for those who don't know a lot about circuitry and the such), thank you!
(I wonder where Jerry plugged in his keyboard...?)
