Unit 6 Microcontrollers Intro 2022

What is Arduino?

(Select any that are true)

• A microprocessor

• A microcontroller

• A company

• A development board

How many digital only Input/Output pins are there on an Arduino Uno?

• 14

• 20

• 8

• 16

Answer explanation

Port D has 8 pins

Port C has 6 pins

Port B is not digital only as it can also read analogue voltages.

What does this symbol shape represent in Flowcode

• Input and Output

• Input

• Input or Output

• Output

Type the exact name of the microcontroller chip used by the Arduino UNO

(There are 10 characters the first three being ATM. There are no spaces)

If connecting an 8 LED display panel to the Matrix Development Kit, which is the best port to use?

• A

• B

• C

• D

What datatype would you use for a variable to store all inputs from this board

• Int

• Bool

• Byte

• Long

How many different hexadecimal digits are there?

Answer explanation

0, 1-9, A-F

Which of these hexadecimal values indicate a byte

with four bits on and the others off?

(click all that apply)

• 0x4E

• 0xBB

• 0xF0

• 0x3C

Answer explanation

0x4E = 01001110

0xBB = 10111011

0xF0 = 11110000

0x3C = 00111100

What is the recommend voltage range for supply to an Arduino Uno

• 7-20v

• 5-12v

• 7-12v

• 6-20v

Answer explanation

The board can operate on an external supply from 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board.

https://store-usa.arduino.cc/products/arduino-uno-rev3

What would be the effect of applying PWM to an LED if a 25% duty cycle is used that is 100 microseconds long?

• The LED would flash on and off

• The LED would not come on

• The LED would flash brightly

• The LED would be on but dim