INPUT, PROCESS, OUTPUT DEVICES AND THEIR USES
INPUT, PROCESS, OUTPUT DEVICES AND THEIR USES
The three parts of any electronic system are INPUT( PROCESS( OUTPUT
|Name of device |Input |Symbol |Energy change |Uses |
| |Process | | | |
| |Output | | | |
|Loudspeaker |O |[pic] |electrical(sound |In CD Player, tannoy, public address system, karaoke |
| | | | |machine |
|Motor |O |[pic] |electrical(kinetic |washing machine, car wiper motor, food processor, |
| | | | |vacuum cleaner |
|Bell |O |[pic] |electrical(sound |door bell, fire bell |
|Buzzer |O |[pic] |electrical(sound |door warning |
|Relay |O |[pic] |electrical(kinetic |switching on high voltage equipment eg control panels |
|Solenoid |O |[pic] |electrical(kinetic |central locking, fire doors |
|LED |O |[pic] |electrical(light |analogue- tuner indicator on radio |
| | | | |digital-on/off power indicators |
|Lamp |O |[pic] |electrical( |analogue-atmospheric lighting, |
| | | |heat & light |digital-table lamp |
|7 segment display |O |[pic] |electrical(light |radio alarm clock display, video player display |
|Microphone |I |[pic] |sound(electrical |tannoy, public address system, karaoke machine |
|Thermocouple |I |[pic] |heat(electrical |kiln thermometer |
|Solar Cell |I |[pic] |light(electrical |power supply for a calculator, solar powered torch |
|Thermistor |I |[pic] |heat(electrical |thermometer for an aquarium |
|Light Dependent Resistor |I |[pic] |light(electrical |burglar alarms, automatic drive lights |
|Capacitor (& resistor) |I |[pic] | |pedestrian crossing patrols |
|Potentiometer |I |[pic] | |volume control in a stereo, boost control in a vacuum |
| | | | |cleaner |
| | |[pic] | | |
|Switch |I |[pic] | |on a table lamp |
|Transistor |P |[pic] |no energy change |SWITCH |
| | | | |>0.7V |
|MOSFET |P | |no energy change |SWITCH |
| | | | |2 V |
LDR is short for Light Dependent Resistor- remember it as Light Drops Resistance
. Some teachers use the term LURD- Light Up Resistance Down, and for a Thermistor (a temperature dependent resistor) TURD- Temperature Up Resistance Down.
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