There are many sites online that explain how things work.

 

The site http://www.pctechguide.com/ is good on hardware

 

More specifically, the following pages have been copied

 

Scanners [01]

 

Digital Cameras [01]

 

Laser Printers [01]

 

The site howstuffworks gives good explanations with pictures

 

More specifically, the following pages have been copied from internet sites.

The web addresses are at the top of each page.

Whilst there is a lot of detail here and it is not for memorisation, the information gives good background reading to your textbook.

 

Serial Port

These pages describe the pin numbers and what they are used for. [01] [02] [03]

 

Parallel Port

These pages describe the pin numbers and what they are used for. [01] [02] [03] [04]

 

Null Printer Adapter

How to connect [01]

 

Modem

These pages include how it works and the Hayes code. [01] [02] [03] [04]

 

ISDN/Cable Modems

Brief description [01]

 

Analogue to Digital recording

This is a brief overview [01]

 

Computer mouse

How it works and connects to the computer [01] [02] [03]

 

Joystick

Analogue and digital [01]

 

Digital Clock

How to make one [01]

 

Dotmatrix printer

Very brief [01]

 

Gray Code

This is in reference to motors [01]

 

Car Computers

This is a detailed look at the sensors and computer systems in cars. [01] [02] [03] [04] [05]

 

Singing Fish

An application showing motors and electronics circuitry [01]