A question about L298N pwm drive

Projects General Guidance
1

Hi, i have a question about l298n module. There is 2 way of motor drive as far as I understand,
1 - I can use jumper for enable pins and directly use pwm (let say D3 pin). I can control motor speed.

2- I can send pwm to enable pin and +5v gnd motor pins. Still i can control motor speed

I m wondering what's the differences and advantages or disadvantages of these 2 methods

Thank you

2

If you are running the motor only in one direction, if you want to reverse and control speed you would need a second PWM pin.

3

I hate these Frizzy style diagrams, but you should find something to help you HERE

Depending on the motors and module, there are several variations.

4

So only advantage is, if we want 2 way direction, using 2 pwm pins instead of 4 . Right?

5

If you wanted reversing with speed control in both directions, 2 non PWM pins for !n1, In2 (direction) and 1 PWM pin for analogWriting ENA (speed), that also gives you braking ability if needed (set both In pins either HIGH or LOW and keep ENA HIGH):

  // brake
digitalWrite(In1,LOW);
digitalWrite(In2,LOW);
digitalWrite(ENA,HIGH);

See figure 6/13 in datasheet:
https://www.st.com/resource/en/datasheet/l298.pdf

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