Electricity and electronics - analogue and digital signals, including the characteristics of waves

This section looks at the differences between analogue and digital, which students should already have covered at KS4, but will probably need revising. Analogue signals are time-varying quantities which convey some sort of information, while digital signals are most commonly one of two values.

It also covers the characteristics of sinusoidal wave forms, most commonly seen in engineering with voltages, including:

  • frequency
  • amplitude
  • periodic time

Students should already be aware of frequency and amplitude, but may not have been introduced to the term or equation for periodic time.