Next Page: Voltage Dividers
A transducer is a device which converts a signal from one form to another. Most electronics circuits use both input and output transducers:
Input Transducers convert a quantity to an electrical signal (voltage) or to resistance (which can be converted to voltage). Input transducers are also called sensors.
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Output Transducers convert an electrical signal to another quantity.
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Most input transducers (sensors) vary their resistance and this can be used directly in some circuits but it is usually converted to an electrical signal in the form of a voltage.
The voltage signal can be fed to other parts of the circuit, such as the input to an IC or a transistor switch.
The conversion of varying resistance to varying voltage is performed by a simple circuit called a voltage divider.
Voltage divider circuit
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