Lesson 11: Motor Control

Lesson 11 - Motor Control With L298N Pupil Notes

Today We Are Learning

Today we will make a motor spin safely using the L298N motor driver.

What You Will Be Able To Do

• Name the important L298N pins.
• Make a motor go forward and backward.
• Change motor speed with a slider/PWM value.
• Explain brake and coast in simple words.

Why We Need L298N

A Bluepill pin is like a small helper. A motor needs a stronger helper. L298N takes commands from Bluepill and sends enough power to the motor.

L298N Pins To Remember

• ENA: Speed for Motor A
• IN1 + IN2: Direction for Motor A
• IN3 + IN4: Direction for Motor B
• ENB: Speed for Motor B

Easy Direction Rules (Motor A)

• Forward: IN1=1, IN2=0
• Backward: IN1=0, IN2=1
• Coast (slow down naturally): IN1=0, IN2=0
• Brake (stop quickly): IN1=1, IN2=1

Speed Rule

ENA uses PWM:

• 0 means stop
• Bigger number means faster
• Start low, then increase

Build Checklist

• Bluepill GND connected to L298N GND
• Motor power connected to L298N power input
• Motor wires connected to output terminals
• ENA, IN1, IN2 connected to Bluepill control pins

Try This

1. Set low speed.
2. Run forward.
3. Stop.
4. Run backward.
5. Test coast and brake.

Think And Explain

• Which pin controls speed?
• Which pins control direction?
• What is the difference between coast and brake?

Challenge

Make a mini routine:

• forward 2 seconds
• stop 1 second
• reverse 2 seconds

Success Check

You pass if:

• Motor changes direction when commanded.
• Speed changes when PWM changes.
• You can explain ENA IN1 IN2 IN3 IN4 ENB.