In my opinion, the 5V from any pin in the arduino will do the job (as for the eanble pin to run the motor).
but allow me to quote a wise man here (@J-M-L ) : read the datasheet, and dont believe me!
I am. Hope the joke won't loose its effect 
May or may not be a thing.
Problem, bread board power rail split:
Solution, bread board power rail split:
The driver is capable of being paralleled. This would increase the current available to the motor.
Hi dougp,
Sorry but I'm a newbie and I don't understand what you're trying to tell me.
I know about computers and just a little bit of electronics. Not used at reading electric schemes.
Can you please explain me as if you are talking to a child 
Thanks alot
?? Are you telling me it's a connection problem?
You know what that means?
You're a genius, it works!
I'm so happy.
Thanks alot. Je te remercie
I just noticed that 2 wires come from the far right side of a breadboard and the breadboard looks like it has a 'wide' space in the middle. Which, to me, is an indicator that the breadboard may have a split rail configuration for power.
Referring to the drawing above, OUT 1 and OUT 2 represent channel A. OUT 3 and OUT 4 represent channel B. This is how you would control two separate motors, with their corresponding EN and INx direction pins.
Paralleling here means the processor provides one ENable signal, which is split to drive both LM298 EN pins. The processor outputs only one 'forward' and only one 'reverse' which are also split and sent to the direction inputs. The outputs are combined so both forward and reverse channels operate together.
The driver operates no differently than it would with two motors, it's just that now the two channels act in concert to always drive the single motor in the same direction and the same speed. The concept is the same as two mechanical switches wired in parallel.
If it works, it is good!
I am very happy for you. 
Oh I understand. No it's not splitted, maybe it's the quality of the pictures not clear enough.
Thanks anyways
Ok, I read 6 times what you wrote and i quite understood the concept.
I recall you wrote: The driver is capable of being paralleled. This would increase the current available to the motor.
Do you mean I could increase the current available to the motor without supplying extra 5 volt just by connecting something in a different way? I'm interested to understand but myabe I'm tired now to be able. Thanks
Let's say each driver channel can handle 2A @12V. So, both channels acting together can handle 4A @12V - assuming the power supply is capable of at least 4A. Imagine using a garden hose to fill your pool. If you add a second hose you could move twice as much water (think electrical current*) and fill the pool faster.
- the analogy is subject to discussion
Hi, so I should use the both channels connecting other cables in parallel to the existing ones?
I understood your hose example, thanks.
Ok Guys, Yesterday I received my little solar panel and it's charge controller.
What I would love to do also is to test the battery level (12v) and if it's necessary send me a notification telling me it's not charging or just telling me the charge level.
I read alot since yesterday and found different solutions but I'm scared at burning my board.
I found this endless changes post, very interesting and sort of complicated:
I also found this which seems easy : https://www.instructables.com/Arduino-Battery-Voltage-Indicator/
What do you suggest is better knowing what I'm doing using the following components, rtc, pir sensor, temp sensor, photoresistor, buzzer?
I hope I will have enough memory to hook the board to my wifi network at the end or do you think I should switch to a wemos d1 r2 board instead of arduino mega?
https://www.amazon.it/ARCELI-ESP8266-sviluppo-Compatibile-programma/dp/B07J2QKNHB
Thanks in advance for your time and help.
BTW I had to connect the board thru the USB port of my solar charge controller.
If I used the board connected to the PC's USB port everything would workd except the motor powering.
I was wondering if I could power the arduino using the Vin pin without using the USB port so that I could also test the battery voltage .
Does anyone know if it's possible and if not, is it possible to supply power to the arduino mega using the usb port and use the Vin pin for testing the batteries voltage at the same time
?
Thanks alot.
I'm not saying it'll solve your problem, just that IF the problem is insufficient current being passed through the one channel adding the other channel in parallel may help with that. There may be other issues.
Thanks, I will try.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.