Transducers

toc = What are transducers? = Transducers change energy from one form to another. Because of this, they can be used to link electronic systems to the 'outside world'.

Most electronics circuits use both input and output transducers:

Here is a table that identifies the main input and output transducers used in everyday electronic products: or to resistance (which can be converted to voltage). Input transducers are also called **sensors**. ||= //Process// |||| Output Transducers convert an electrical signal to another quantity. || Converts brightness (of light) to resistance || ||   ||=  || //**Lamp**// Converts electricity to light. || Converts mechanical energy to electrical energy ||= ||   ||=  || //**Loudspeaker or buzzer**// Converts electricity to sound || Converts temperature to resistance ||= ||   ||  || //**Light emitting diode**// Converts electricity to light || Converts sound to voltage || ||   ||  || //**Piezo transducer**// Convert an electrical signal to sound || Converts position (angle) to resistance. || ||   ||  || //**Motor**// Converts electricity to motion. || = Tasks using Omega Kits = Starting with the simple circuit as above you will investigate different arrangements of switches and different types of switches and the effect on other components in the circuit. Using the Omega kits you will assemble each of these circuits as outlined in the worksheet below. Drawing each circuit by hand and then for homework use Yenka to draw and test each of the circuits.
 * = **INPUT TRANSDUCER** ||= → ||= **ELECTRONIC SYSTEM** ||= → ||= **OUTPUT TRANSDUCER** ||
 * Input Transducers convert a quantity to an electrical signal (voltage)
 * = **Example** ||=  ||||= **Example** ||
 * //**Light sensor**//
 * //**Dynamo**//
 * //**Temperature sensor**//
 * //**Microphone**//
 * //**Variable resistor**//
 * Examining the effects of different types of switches**

= Using input transducers (sensors) = Most input transducers (sensors) vary their **re****sistance** 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**.

= References = []

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