Motor, Potentiometer , L298n, Arduino board

Projects Programming
21

neiklot:
Says in that link that those motors require an ESC which I think means they can't be run from an h-bridge using PWM.

(edit) But afaik, an ESC and such a motor then actually does act like a servo and can be controlled by the servo library. Not sure of the details though.

Do you have any recommendations on what DC motors would run on that H-bridge?

22

Do you have any recommendations on what DC motors would run on that H-bridge?

Up to 46V and 2A (or 4A if you use both sides of the chip for one motor), according to the L298 datasheet.

But imo for new builds in 2019 nobody should be bothering with the old L298. Did you see the size of the heat sink on the ones you are waiting for?- you're paying to use your energy warm the air ;). Very inefficient, and they throw away between 2 and 5 of your supplied volts.

And anyway, shouldn't you spec the motors according to what you want them to do, then find a driver that can handle them?

23

Maybe now you're beginning to understand why we ask people to give full details of their projects.

Those 540 motors do not need an ESC. They can be used with one, though brushed ESCs aren't as easy to find as they used to be. You can equally use them with a motor driver but not an L298. The amount of current they use will burn out an L298 in seconds.

So what are you actually making, what motors do you really NEED and what control do you want? Just speed? Or direction too? If it's just speed you don't need either ESC or H-bridge. Simple MOSFET circuits will do it.

But if you don't provide any useful information you have no real chance of getting useful advice.

Steve

24

slipstick:
Those 540 motors do not need an ESC.

I'm not in any position to doubt your word, but the page the OP linked says that one does.

540 ESC.GIF

540 ESC.GIF

25

It is a brushed motor and it looks like a completely normal 27-turn Mabuchi 540. It will normally be used in RC cars or similar with an ESC but it does not NEED one, just something to provide switched current.

It's just possible that there is something terribly special about this particular motor but I rather doubt it.

Steve

26

I need to control just speed gentlemen.

27

BullEngineer:
I need to control just speed gentlemen.

Congratulations, that's one question answered. Now try for some of the others.

Steve