L298N motor driver help (@star and me)

A

AARAVmakesOP•9/30/25, 12:21 AM

@star Code

int motorone  = 27;
int motortwo  = 26;
int enable    = 14;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(enable, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(enable, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 27;
int motortwo  = 26;
int enable    = 14;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(enable, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(enable, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 27;
int motortwo  = 26;
int enable    = 14;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(enable, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(enable, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 27;
int motortwo  = 26;
int enable    = 14;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(enable, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(enable, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

This is your test code STAR

A

AARAVmakesOP•9/30/25, 12:21 AM

My code

A

AARAVmakesOP•9/30/25, 12:21 AM

int motorone  = 23;
int motortwo  = 22;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 23;
int motortwo  = 22;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 23;
int motortwo  = 22;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

int motorone  = 23;
int motortwo  = 22;
int ledone    = 2;
int DELAYone  = 200;

void setup() {
    pinMode(motorone, OUTPUT);
    pinMode(motortwo, OUTPUT);
    pinMode(ledone, OUTPUT);
    Serial.begin(115200);
    digitalWrite(motorone, HIGH);
    digitalWrite(motortwo, LOW);
}

void loop() {
    digitalWrite(ledone, HIGH);
    delay(DELAYone);
    digitalWrite(ledone, LOW);
    delay(DELAYone);
    Serial.println("Motor on full speed");
}

A

AARAVmakesOP•9/30/25, 12:22 AM

@Maderdash @star

A

alexsbmagalhaes•9/30/25, 12:28 AM

So, I'll keep my answers here cause I'm grumpy and want to go to bed.

A

alexsbmagalhaes•9/30/25, 12:29 AM

And I'll answer you since you look like someone interested in solving your problem and others peoples also.

A

alexsbmagalhaes•9/30/25, 12:29 AM

I know this chip from a long time

A

aisle ng broken•9/30/25, 12:31 AM

yayyy

A

aisle ng broken•9/30/25, 12:31 AM

thanks @AARAVmakes

A

alexsbmagalhaes•9/30/25, 12:31 AM

lol

A

alexsbmagalhaes•9/30/25, 12:31 AM

https://www.alldatasheet.com/datasheet-pdf/view/22440/STMICROELECTRONICS/L298N.html

L298N PDF

Part #: L298N. Description: DUAL FULL-BRIDGE DRIVER. File Size: 185.1 Kbytes. Manufacturer: STMicroelectronics.

A

alexsbmagalhaes•9/30/25, 12:32 AM

first just look how old and simple this chip is

A

alexsbmagalhaes•9/30/25, 12:34 AM

second, does your board looks exactly like this?

A

AARAVmakesOP•9/30/25, 12:34 AM

Mine is EXACTALY like that

A

alexsbmagalhaes•9/30/25, 12:35 AM

Please pay attention to the jumpers, where it says "12V jumper" and "enable A" and "enable B"

A

AARAVmakesOP•9/30/25, 12:35 AM

But my problem is that I don’t have common GND

A

AARAVmakesOP•9/30/25, 12:35 AM

I removed the jumper cuz I’m powering from 5v

A

alexsbmagalhaes•9/30/25, 12:35 AM

thats no problem, you first need to understand what you have in your hands

A

aisle ng broken•9/30/25, 12:35 AM

both of our boards are the same shield variant

A

alexsbmagalhaes•9/30/25, 12:36 AM

even the jumpers and eveything?

A

alexsbmagalhaes•9/30/25, 12:36 AM

great then

A

AARAVmakesOP•9/30/25, 12:36 AM

A

AARAVmakesOP•9/30/25, 12:36 AM

I’m not home anymore

A

alexsbmagalhaes•9/30/25, 12:38 AM

okay, so I hope you see some similarities between your board and the datasheet circuit:

A

alexsbmagalhaes•9/30/25, 12:38 AM

Its everything there, those diodes, resistors, capacitors... just look at your board.

A

alexsbmagalhaes•9/30/25, 12:38 AM

now for the misterious pins on the left side

A

alexsbmagalhaes•9/30/25, 12:39 AM

they are all externalized to those blue screw connectors on your board

A

alexsbmagalhaes•9/30/25, 12:39 AM

you must use all of them in order for the circuit to work

A

alexsbmagalhaes•9/30/25, 12:39 AM

otherwise the image above wont be the same

A

alexsbmagalhaes•9/30/25, 12:40 AM

so, here is the 1 million dollar question:

what have you connected to those blue screw heads?

Aalexsbmagalhaes so, here is the 1 million dollar question: what have you connected to those blu...

A

aisle ng broken•9/30/25, 12:41 AM

to my esp32

A

aisle ng broken•9/30/25, 12:41 AM

A

alexsbmagalhaes•9/30/25, 12:42 AM

right, but exactly what goes where, you can write over the picture I dont care its ok

A

alexsbmagalhaes•9/30/25, 12:42 AM

it only takes a minute and saves you and all of us hours of debugging...

Aalexsbmagalhaes right, but exactly what goes where, you can write over the picture I dont care i...

A

aisle ng broken•9/30/25, 12:43 AM

uhhh

A

aisle ng broken•9/30/25, 12:43 AM

hold on

A

alexsbmagalhaes•9/30/25, 12:44 AM

I wait.... everything for science students

A

AARAVmakesOP•9/30/25, 12:44 AM

I’m wondering how do I get common GND between my computer USB port and my power bank

AAARAVmakes I’m wondering how do I get common GND between my computer USB port and my power ...

A

alexsbmagalhaes•9/30/25, 12:45 AM

through the USB cable, but its another topic, cause many are insulated, so I can tell you another time

Aalexsbmagalhaes I wait.... everything for science students

A

aisle ng broken•9/30/25, 12:45 AM

Ena goes to d14

in1 goes to d27

in2 to d26

Aalexsbmagalhaes through the USB cable, but its another topic, cause many are insulated, so I can...

A

AARAVmakesOP•9/30/25, 12:45 AM

I stripped mine

A

AARAVmakesOP•9/30/25, 12:45 AM

You can see it here were it connects to the 5v port

AAARAVmakes I stripped mine

A

aisle ng broken•9/30/25, 12:45 AM

first port to red wire battery

second port gnd + battery wire

A

aisle ng broken•9/30/25, 12:46 AM

user aarav, we WILLfigure out these l298n boards

Aaisle ng broken first port to red wire battery second port gnd + battery wire

A

aisle ng broken•9/30/25, 12:46 AM

weong rely

A

AARAVmakesOP•9/30/25, 12:46 AM

K

A

AARAVmakesOP•9/30/25, 12:46 AM

Aaisle ng broken first port to red wire battery second port gnd + battery wire

A

aisle ng broken•9/30/25, 12:46 AM

@alexsbmagalhaes

A

aisle ng broken•9/30/25, 12:46 AM

A

alexsbmagalhaes•9/30/25, 12:47 AM

haha yes yes of course, so, now you know that your enable is at d14 on ESP32 right?

L298N motor driver help (@star and me)

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