Category: Input/ Output Devices

Thermistors

The Thermistor is a solid state temperature sensing device which acts a bit like an electrical resistor but is temperature sensitive. Thermistors can be used to produce

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DC Motors

Electrical DC Motors are continuous actuators that convert electrical energy into mechanical energy. The DC motor achieves this by producing a continuous angular rotation that can

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Sound Transducers

Sound is the generalised name given to “acoustic waves”. These acoustic waves have frequencies ranging from just 1Hz up to many tens of thousands of

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Summary of Transducers

We have seen in this section on Input/Output Devices that transducers are devices which convert one form of energy into another. For example, microphones convert sound waves

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Temperature Sensors

These types of temperature sensor vary from simple ON/OFF thermostatic devices which control a domestic hot water heating system to highly sensitive semiconductor types that

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Electrical Relay

Thus far we have seen a selection of Input devices that can be used to detect or “sense” a variety of physical variables and signals and are

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Position Sensors

As their name implies, Position Sensors detect the position of something which means that they are referenced either to or from some fixed point or position. These

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Light Sensors

A Light Sensor generates an output signal indicating the intensity of light by measuring the radiant energy that exists in a very narrow range of frequencies basically

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