Can't control DC motors with Arduino Due?

Using Arduino Motors, Mechanics, Power and CNC
1

Hello guys,
I am trying to drive a DC motor with Arduino Due and L293D Motor Shield but using this simple (and others) code my motor wont even turn (12v).
I tried with a multimeter and i noticed that i have 0v on all M and 12v in EXT_POWER, with jumper in and off.
Which problem coult it be?

void setup() {
  pinMode(12,OUTPUT);     //Channel A Direction Pin Initialize
}

void loop() {
  
  analogWrite(11, 0);      //Channel A Speed 0%
  delay(100);             //100ms Safety Delay
  digitalWrite(12, HIGH); //Channel A Direction Forward
  analogWrite(11, 255);    //Channel A Speed 100%
  delay(1000);            //1 Second Delay
  
  analogWrite(11, 0);      //Channel A Speed 0%
  delay(100);             //100ms Safety Delay
  digitalWrite(12, LOW);  //Channel A Direction Reverse
  analogWrite(11, 255);    //Channel A Speed 100%
  delay(1000);
  
}
2

Please supply a circuit.

Hand drawn and clear photograph will do.

Weedpharma

3

Do you have a high enough voltage to the L293's VCC1 logic supply? If that's hooked up to the Due it will be getting 3.3 but it needs 4.5 to 7 according to L293 datasheet.

But as weedpharma says, let's see a schematic....

4

weedpharma:
Please supply a circuit.

Hand drawn and clear photograph will do.

Weedpharma

i Just plugged in a 12v 1.5A AC Adapter into Arduino Due Power plug and then connected a common DC Motor in M1 pins

5

So you don't have any power at all to the motor shield?

Why not draw an accurate circuit rather than vague descriptions that are incomplete? Every detail
matters in a circuit, so show it all.

6

This is my setup

7

OP's link, inline.... for what it's worth

8

setup
*right message, the other one has a wrong image

9

What voltage do you have on the 293's pin 16, which needs to be >4.5 to drive the chip? See datasheet.

10

OP could be doing this his/her self grrrrrrr:

I'm out until we get an answer on 293's pin 16's voltage.... is it getting 4.5-7? If not the chip's turned off.

11

JimboZA:
OP could be doing this his/her self grrrrrrr:

I'm out until we get an answer on 293's pin 16's voltage.... is it getting 4.5-7? If not the chip's turned off.

There is not a pin 16, or i am wrong?

12

Emerald:
There is not a pin 16, or i am wrong?

Of the 293 chip itself, not the shield.

Look for the 293 on the shield, find the little cut-out "U" thingy which means the top, and pin 16 is to its right. Check the datasheet.....

293 pins.JPG

13

I have 4.95v on all 3 chips

14

Emerald:
I have 4.95v on all 3 chips

Ok well that answers the querstion I asked 4h ago in #2. :confused:

Now what's on pin 8, VCC2 the motor voltage?

15

JimboZA:
Ok well that answers the querstion I asked 4h ago in #2. :confused:

Now what's on pin 8, VCC2 the motor voltage?

12v in first and last, 0 in the middle one

16

Are there actually 3x 293s on the shield? I wonder which one is proving the power to the connector you're using for the motor.

Apart from that, are you enabling the motors though: you need 5V on 293 pin 1 for a 293's "left side motor" and 5V on 293 pin 8 for the "right side motor". I don't know which Arduino pins those translate to.

And then you need high/low or low/high on 293's pin 2/7 for left side and 293's pin 10/15 for the right, whatever Arduino pins those connect to.

17

JimboZA:
Are there actually 3x 293s on the shield? I wonder which one is proving the power to the connector you're using for the motor.

Apart from that, are you enabling the motors though: you need 5V on 293 pin 1 for a 293's "left side motor" and 5V on 293 pin 8 for the "right side motor". I don't know which Arduino pins those translate to.

And then you need high/low or low/high on 293's pin 2/7 for left side and 293's pin 10/15 for the right, whatever Arduino pins those connect to.

Uhm so i should change my code to try right side motors?
also isnt 8 going to C8?