I'm using an Arduino UNO
Ive used an L298N motor controller to control two motors. I have a seperate battery pack wired into the L298N to power both the Motor Controller and the motors through it.
The logic pins are connected to the Arduino, I can control enabling pin A or Pin B or set both high to enable both motors. Then there are the IN1 to IN4 to control what the motors do. I think the arduino is using 3.3 volts to set all these pins. I used the pis 1 to 13 (obviously not all of them for the 6 pins I need.)
One the other side of the Arduino UNO there are 8 female headers.plus 6 analogue headers.
Here is what is printed beside the female Headers. Only 6 directions so the top two female headers I don't see what they are for ? two blanks ? Its this side of the Arduino I want to understand !!
So to me it looks like there is only one pin/header where I can get 5V ?
Why are there two Ground pins , one for the 5V and one for the 3.3volt ?
I think the pins I used to control the logic were 3.3volts.
Im using an external power pack of 6.3 volts. It seems to drive the two motors just fine.
Actually, i just read that the Arduino Uno output pins are all 5volt.
Next Im going to try and use a small chip that can also power both motors its tiny compared to the L298N. The little chip is a SN54410NE, but I have to find a simple drawing first