So I have the S9018 which are OK for my application.
At work they gave me split air conditioner stepper motors which run at 12V.
What driver breakout board.When I zoom in, I see ULN2003 written on that green board.That's a current sink (not source) chip.It won't provide any base current for the transistors.Unless Fritzing is different to what you're actually using.It usually is, so most of us hate it.Leo..
Datasheet states an absolute max collector current of 50mA.Just ok for a LED, and NOT OK for a motor.Leo..
Is this also a 28BYJ motor?If so, why not say so.If not, then that is the motor we need the details for.And please don't make significant changes to Posts after people have replied to them. Put new information in a new Reply....R
No it's not 28BYJ, it's another one which run at 12V. It's MP2423.But I'm not applying this stepper motor right now, I want to learn how to interface stepper motors with transistors then after that I can run other similar stepper motors.
So, you say ULN2003 is sink not source chip. But it is actually came with the 28BYJ in the Arduino starter kit.And the breakout is suitable for driving the motor without any other components.But what I'm trying to do is I want to interface more powerful stepper motors which this breakout board can't drive so I have to interface these more powerful stepper motors with transistors. That's my goal
Do you mean most of you hate Fritzing? If so why?
But what I'm trying to do is I want to interface more powerful stepper motors which this breakout board can't drive so I have to interface these more powerful stepper motors with transistors. That's my goal
You first need to show us that the MP2423 is similar, because I suspect it is not.If you want to explore the use of transistors that is a good thing. However if all you really want to do is get your stepper motor to move then use a suitable stepper motor driver and don't bother with transistors....R
The ULN2003 is just an array (7) of NPN darlington transistors and kickback diodes.The outputs can only switch current to ground.The chip is capable of driving small motors (switching the coils to ground).You could do the same with individual transistors (NPN or mosfets) and kickback diodes.Since the chip can only sink (draw/use) current (<500mA), and not source (provide), you can't use it to provide base current for NPN transistors.Arduino pins can source and sink (<40mA), so can drive transistors.So you can use only the ULN2003 or only transistors, but not both in series.As Robin2 said, use motor drivers for bigger steppers.There is much more to it than just a larger motor current.Leo..
Most steppers are bipolar, not unipolar, you should start by saying what motor you are thinking of. Itmay well require a current-controller chopper-driver (most do).
Well, it's actually similar.......And, at the end I got to the solution.I can just run the 12V stepper motor with the ULN2003 driver breakout board and external power source.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16