Sensors and Transducers: O-Level Electronics module overview of input transducers, switches and variable resistors, output transducers and the relay

An O-Level Electronics overview of the Sensors and Transducers module. Input transducers (the LDR and thermistor), switches and variable resistors as inputs, output transducers and their energy conversions, and the relay with its flyback diode for driving large loads, with links to every dot point.