How to Use a Potentiometer with Arduino analogRead

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Science, Information Technology (IT), Architecture, Engineering
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1st - 6th Grade
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of a potentiometer in a circuit?
To convert AC to DC
To vary resistance and control voltage
To act as a power source
To provide a fixed resistance
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many pins does a typical potentiometer have?
Five
Two
Four
Three
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of connecting the potentiometer's middle pin to an Arduino's analog input?
To power the Arduino
To read a variable voltage
To measure a fixed voltage
To ground the circuit
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which Arduino function is used to read analog values from a pin?
digitalWrite()
analogRead()
analogWrite()
digitalRead()
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the range of values returned by the analogRead() function?
0 to 1023
0 to 10
0 to 255
0 to 5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it necessary to convert the potentiometer reading before using it with analogWrite()?
Because analogWrite() needs a voltage input
Because analogWrite() only works with PWM pins
Because analogWrite() requires a digital input
Because analogWrite() only accepts values between 0 and 255
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the maximum value that can be used with the analogWrite() function?
1023
128
512
255
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