Light-Dependent Resistors (LDR) and Light-Emitting Diodes (LED) (Junior Cert Wood Technology): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
What does LDR stand for?
What does LDR stand for?
Light-Dependent Resistor
LDR alternative name
LDR alternative name
Photoresistor
What happens to LDR resistance as light increases?
What happens to LDR resistance as light increases?
Resistance decreases
What does LED stand for?
What does LED stand for?
Light-Emitting Diode
How do LEDs produce light?
How do LEDs produce light?
Electroluminescence
LED energy efficiency vs old bulbs
LED energy efficiency vs old bulbs
Use less energy (more efficient)
LED lifespan vs normal bulbs
LED lifespan vs normal bulbs
Last longer
LED size advantage
LED size advantage
Compact, good for different designs
LDR outdoor lighting application
LDR outdoor lighting application
Automatic street lights
LDR home lighting application
LDR home lighting application
Night lights
How LDRs enable device automation
How LDRs enable device automation
Devices turn on/off based on light levels
Impact of LDR resistance changes
Impact of LDR resistance changes
Affects connected devices
LDR + LED circuit function
LDR + LED circuit function
Automatically manage light changes
Three advantages of LEDs over old bulbs
Three advantages of LEDs over old bulbs
Energy efficient, durable, compact