1 There are two types of circuit, series and
1.1 Advantages of parallel is that each lamp can be switched
on individually and if one blows the others will stay on.
2 Current is measures in amps, voltage is
measured in volts.
2.1 Current is the flow of electrons in a circuit, voltage is
the amount of energy between two points in a circuit.
2.1.1 In a circuit, current travels from the negative terminal
to the positive terminal.
3 There are two types of signals, digital and
3.1 On an oscilloscope, an analogue signal is an exact replica of
the original sound wave, whereas with a digital signal, it
selects sampled sections of the sound wave, which makes it
work faster, but not as smooth.
3.1.1 Examples of digital devices are T.V's, D.V.D's, calculators and
more modern devices. Examples of analogue devices are
record players, radios, microphones and more audio type
4 There are three main logic gates, AND, NOT
4.1 You use the numbers "1" and "0" to
represent if the output is "on" or "off."
4.2 With an AND gate, there are two inputs
and you need only one input to be 1 for
the output to be 1.
4.3 With an OR gate, again, there are
two inputs, but you need both to be
1 for the output to be 1.
4.4 With a NOT gate, there is one
input, of which is always
opposite to the output.