Electronics (Junior Cert Engineering): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
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Practise the cards
15 cards from this deck
What does a potential divider do?
What does a potential divider do?
Splits supply voltage into smaller, useful voltages
Design rule: load vs divider resistor
Design rule: load vs divider resistor
Load should be at least 10x greater than divider resistor
Three parts of input-process-output model
Three parts of input-process-output model
Input (sensors), Process (transistor), Output (devices)
Thermistor resistance when temperature increases
Thermistor resistance when temperature increases
Resistance decreases as temperature increases
Transistor base voltage needed to switch on
Transistor base voltage needed to switch on
LDR resistance when light shines on it
LDR resistance when light shines on it
Resistance decreases when light shines on it
LDR position for automatic lighting in darkness
LDR position for automatic lighting in darkness
Top resistor in the potential divider
How moisture sensor creates circuit path
How moisture sensor creates circuit path
Water bridges contacts allowing current to flow
What first two resistor colour bands show
What first two resistor colour bands show
First two digits of the resistance value
What third resistor colour band shows
What third resistor colour band shows
Number of zeros that follow
Red, Violet, Orange, Gold resistor value
Red, Violet, Orange, Gold resistor value
PCB as a construction method
PCB as a construction method
Highest quality permanent circuit construction
Solution used for PCB etching
Solution used for PCB etching
Ferric chloride solution
Soldering iron specs for PCB work
Soldering iron specs for PCB work
-watt with tip
Heat sink for heat-sensitive components
Heat sink for heat-sensitive components
Crocodile clips attached to leads