How computers work

heartlustElectronics - Devices

Nov 2, 2013 (3 years and 7 months ago)


How computers work


In the later part of the 1950s, valves
started to be replaced by transistors in a
wide variety of electronic equipment
including computers.

How computers are built

You'll be able to create a custom machine that exactly
matches your needs.

It will be much easier to upgrade your machine in the
future because you'll understand it completely.

You may be able to save some money.

And, if you've never done it before, you'll definitely
learn a lot about computers.

In this article, we'll take you through the entire
process of building a computer. You'll learn how to
choose the parts you'll use, how to buy them and how
to put them all together. When you're done, you'll
have exactly the machine that you need.


The CPU or Central Processing Unit is the "brain" of the
computer, it is the 'compute' in computer. Without the CPU, you
have no computer. Computer CPU's (processors) are
composed of thin layers of thousands of transistors. Transistors
are tiny, nearly microscopic bits of material that will block
electricity when the electricity is only a weak charge, but will
allow the electricity pass through when the electricity is strong
enough. The transistors within the CPU transition from being a
conductor (resist the electricity) to a conductor (they
conduct electricity) when the electrical charge is strong enough.
The material that CPU transistors are made of loses its
resistance to electricity and becomes a conductor when the
electricity gets strong enough. The ability of these materials
(called semi
conductors) to transition from a non
conducting to
a conducting state allows them to take two electrical inputs and
produce a different output only when one or both inputs are
switched on. A computer CPU is composed of millions (and
soon billions) of transistors. Because CPU's are so small, they
are often referred to as microprocessors.