Motor direction with H-Bridge (L293D/L298N) in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the motor direction pin as output.

Arduino

pinMode([1], OUTPUT);

Drag options to blanks, or click blank then click option'

AmotorPin1

BmotorPin2

CmotorSpeed

DanalogPin

Attempts:

3 left

💡 Hint

Common Mistakes

Using the speed pin instead of direction pin.

Forgetting to set the pin mode.

We use pinMode to set the motor direction pin as an output pin so we can control it.

2fill in blank

medium

Complete the code to turn the motor forward by setting motorPin1 HIGH.

Arduino

digitalWrite(motorPin1, [1]);

Drag options to blanks, or click blank then click option'

ALOW

BHIGH

CINPUT

DOUTPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Using LOW instead of HIGH.

Confusing pin modes with pin states.

Setting motorPin1 to HIGH makes the motor spin forward.

3fill in blank

hard

Fix the error in the code to stop the motor by setting both direction pins LOW.

Arduino

digitalWrite(motorPin1, [1]);
digitalWrite(motorPin2, [1]);

Drag options to blanks, or click blank then click option'

AOUTPUT

BINPUT

CHIGH

DLOW

Attempts:

3 left

💡 Hint

Common Mistakes

Setting one pin HIGH and the other LOW.

Using pin modes instead of pin states.

Setting both direction pins to LOW stops the motor.

4fill in blank

hard

Fill both blanks to reverse the motor direction by setting motorPin1 LOW and motorPin2 HIGH.

Arduino

digitalWrite(motorPin1, [1]);
digitalWrite(motorPin2, [2]);

Drag options to blanks, or click blank then click option'

ALOW

BHIGH

CINPUT

DOUTPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Setting both pins HIGH or both LOW.

Mixing up which pin is HIGH or LOW.

To reverse the motor, set motorPin1 to LOW and motorPin2 to HIGH.

5fill in blank

hard

Fill all three blanks to create a 2D array that maps motor states to pin values: forward (motorPin1 HIGH, motorPin2 LOW), reverse (motorPin1 LOW, motorPin2 HIGH), stop (both LOW).

Arduino

int motorStates[3][2] = {
  [1],  // forward
  [2],  // reverse
  [3]   // stop
};

Drag options to blanks, or click blank then click option'

A{HIGH, LOW}

B{LOW, HIGH}

C{LOW, LOW}

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the HIGH/LOW order for forward and reverse.

Using HIGH for stop state.

This 2D array maps the motor states to their corresponding pin settings. For example, index 0 ("forward") maps to {HIGH, LOW} for motorPin1 and motorPin2.