In general, an electrical circuit represents a closed loop, which provides the current return path, and consists, in most cases of power source, wires, a fuse, a load and a switch.

Electronic circuits can be divided in three major categories:

· Analog circuits that process signals continuously variable over time and / or frequency;

· Digital circuits that processes signals that may, typically, consists only 2 values corresponding to binary digits 0 and 1;

· Mixed circuits that process both analog and digital signals.

Analog circuits are electronics systems which have a continuously variable signal. This describes a proportional relationship between the signal and the voltage or the current that is representing the signal.

 

 

Related links:

Here students and teachers can find out together, in an interesting way, what electricity is, how is produced, how it works and the most important thing…where and how any of us can produce it even without being conscious.

http://www.youtube.com/watch?v=fDvZOp9Oqro&feature=relmfu

Have fun !