Work Package 4 Flashcards
1
Q
what are two examples of digital sensors?
A
- an on/off switch
2. a device which generates pulses
2
Q
what is an analogue sensor?
A
a device which generates a changing voltage in response to a physical quantity
3
Q
what are three examples of devices which generate a changing voltage in response to a physical quantity
A
- light dependent resistor (LDR) - light
- thermistor - heat
- potentiometer - angle or length
4
Q
with an LDR, when the light intensity increases, what happens to the resistance?
A
the resistance decreases with the light intensity increasing
5
Q
with a thermistor, when the temperature increases, what happens to the resistance?
A
the resistance decreases with the temperature increasing
6
Q
on a potentiometer, when the spindle is moved, what can this control?
A
can be moved to change the resistance value of the potentiometer
