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COMP100 Homework #1

What is the primary difference between analog and digital?

What is the voltage output of a digital I/O?

3.3V

What are the two power sources on the LinkNode D1 board?

3.3V

What does IR stand for?

Interrupt Routine

Infrared

Interference

Intrared

What type of sensor was used in the first project?

How do you perform an analog read in C++/Arduino environment?

Read()

AnalogRead()

Read()

ReadAnalog()

How many analog I/O pins are there on the LinkNode D1?

What function call do you use to configure an I/O pin as an input or output?

PinMode()

PinSetup()

PinSet()

PinConfig()

If a 120 Ohm resistor is used in series with a red LED with a forward voltage of 2.4V, will you be able to ensure that at least 20 mA of current will pass through the circuit? (Power source is 5V)

Yes

Given a blue LED with a forward voltage of 3.5V, what minimum resistance do you need in order to ensure 20mA of current?

50 Ohms

75 Ohms

175 Ohms

250 Ohms

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