A. Systems Approach to Designing Flashcards
1
Q
Examples of Inputs
A
- LDR
- Pressure sensor
- Switch
- Temperature sensor
2
Q
Light Dependent Resistor
A
- Detects changes in light levels
- Low light = High resistance
- Lots of light = Low resistance
Used in street lights
3
Q
Pressure sensor
A
- Detects changes in pressure in gases or liquids
Used to detect a leak in a fuel system
4
Q
Switch
A
- Turn a circuit on or off
Used in lighting, control panels and power switches
5
Q
Temperature sensor
A
- Detects a change in temperature
- High temp. = Low resistance
Used in household appliances and vehicles
6
Q
Process examples
A
- Resistor
- Microcontroller
7
Q
Resistor
A
Limits the flow of current and helps to protect components from being overloaded
8
Q
Microcontroller
A
A programmable component is a chip; used in washing machines
9
Q
Output examples
A
- Buzzer
- Lamp
- LED
- Speaker
10
Q
Buzzer
A
- Sound output
Used in doorbells and toys
11
Q
Lamp
A
- Light output (of varying levels)
Used for household lighting
12
Q
Light Emitting Diodes (LED)
A
- Light output
- Low power and long lasting
13
Q
Speaker
A
- Sound output
Used in sound systems, laptops and radios
