28BYJ-48 STEPPER MOTOR WITH ULN2003 DRIVER - Arduino tutorial #14

[@jennifercraig3820]

Hi there, would it be possible to connect a battery pack of 6V as the power supply rather than an adapter? (sorry if this is a silly question, I'm new to electronics and don't want to end up frying my arduino or blowing something up!)

[@BasonTech]

6V is too much, the motor is rated 5V max. Also make sure your battery pack can provide enough amps.

[@carlosvargas1443]

where is the course description so I look at the code

[@BasonTech]

It depends how you watch this video. You'll find all the links in the video description. For this tutorial it is arduino-tutorials.net/tutorial/control-28byj-48-stepper-with-uln2003-driver-with-arduino 😃

[@Brandon-qp7gq]

how is it safe to connect the ground of the power supply to the arduino while the positive voltage comes from elsewhere? what if the power supply is a battery?

[@BasonTech]

I don't understand your question. They share a common ground but the circuits are individual for powering the motor and for the driver.

[@speedstacker593]

When I connect my external power supply, same as yours, my arduino does not light up and turn green and orange. Any idea why? Wiring is identical as in the video

[@speedstacker593]

I believe it is the power adapter. When I plug the external source directly into the arduino, it works fine but when I use the adapter and wire like you it doesn’t not work

[@BasonTech]

Maybe the voltage is too low?

[@speedstacker593]

@@BasonTech it works when it is just the power supply plugged into the arduino. When I use the adapter and breadboard it does not work

[@BasonTech]

Sound like an incorrect wiring or a faulty breadboard

[@speedstacker593]

@@BasonTech The breadboard is working properly and the wiring is identical to the video. I will keep playing around with it and see what I can get. Thank you for the help!

[@rekhasaini672]

Can I use a 5v breadboard supply module for instead of the adapter

[@BasonTech]

You can, but you shouldn't. The motor can draw peak powers which could damage your Arduino.

[@rekhasaini672]

Thank you

[@fadygharbi7479]

Hi there I did the same code The motor is just vibrating not turning any solution ?

[@BasonTech]

If the code is exactly the same, please check your wiring. Maybe there is a loose connector or the wrong power supply.

[@dogme666]

hi, thanks for the video! it got me severall steps forward, i have a question though, im using a computer power suply , when i conect it like this to the 12v power rail of the psu it works for about half a minute and stops, the chip gets really hot and if i disconect and wait a bit it works again, do you have any suggestion to what i might have done wrong? my ground rail comes from the power suply as well. any insight on this will be extremely helpfull. edit: there is a problem with my uln2003 board, a diferent board works perfectly, gonna trtoubleshoot the traces now, thank you for the video!!!

[@BasonTech]

Thanks for the update! Maybe you've damaged the ULN2003 chip with a faulty connection and that makes it hot?

[@dogme666]

@@BasonTech the ic works on a different board, so I suspect there is a short on the little circuit board.

[@BasonTech]

Great you got it working, well done! 😃

[@juliusaitken]

Hi Baz! How would i amend the code to control TWO stepper motors so they behave completely independently?

[@BasonTech]

What part did you get stuck and did not work?

[@ersatz7107]

is there a code for controlling the motor with a potentiometer like how you would control a servo motor with a potentiometer?

[@BasonTech]

You can combine the code of the potentiometer tutorial with this one. Convert the range of the potentiometer to the amount of degrees you want the motor to rotate.

[@iszjhxsbxb]

how many stepper motors can i control with ardino uno

[@BasonTech]

Theoretically as much as you want. Practically there are some limitations: speed of controlling all motors, current drawn by the motors, the number of pins available. This topic quite covers your question forum.arduino.cc/index.php?topic=241152.0

[@expires_today]

I have a problem, I connected everything correctly, but the motor only makes sounds and does not spin, it also vibrates, I have already tried to increase the voltage, but it still does not work

[@BasonTech]

It could be that the pin layout is different on you PCB board. Then the steps will not work.

[@dinzzz0000]

Hi, my stepper is vibrating nut it is not actually rotating :( do you know what the problem might be ?

[@BasonTech]

Hi, make sure the wires are connected correctly. Other thing could be the power supply not being connected correctly

[@biswa145]

What is the steps per revolution of the stepper motor you used?

[@BasonTech]

Hi Mishra, Officially it is 64, some people at forum.arduino.cc/index.php?topic=71964.15 calculated it is actually 63.68395 😃

[@biswa145]

@@BasonTech There's no single answer. Some are saying it's 64, some saying it's 4096?!

[@heathcarter4654]

Cheers really usefull

[@BasonTech]

Great to hear, thanks! 😃

[@ValerianKapeller]

Why always 8,9,10,11 pins on the arduino? Can i go for 2,3,4,5 as well? Thank you :)

[@ahmadaidit6175]

i think you can, just change the pin at 4:45

[@BasonTech]

Hi, that depends on the requirement of the pins. Pin 2, 3, 4 and 5 could work but you have to keep in mind if your application needs for example PWM pins. It then is important to select the correct ones.

[@ValerianKapeller]

@@BasonTech thank you very much for your answer! :) Got it!

[@v.ssarath911]

THANKS a lottttttttt. THANK YOU SOO MUCH

[@BasonTech]

Glad I can help 😃

[@alanpereira6824]

I want to turn off the stepper motor once it rotates half way. I do not want it to loop. Can the driver do that?

[@BasonTech]

Sure, that should not be a problem

[@last1b4free]

new subscriber !

[@BasonTech]

Welcome! 😃

[@azozalshateri5029]

The ULN2003 driver dose not show lights, I do not know why?

[@BasonTech]

Are you sure you've powered the motor and board correctly?

[@azozalshateri5029]

@@BasonTech yes, I am so sure that I do the same what you did in the video. May there a problem in Uln2003 itself or the type of Arduino because when you run the code it appears green light in your Arduino but my Arduino red light apears.

[@azozalshateri5029]

@@BasonTech many thanks, I solved the problem. The problem was the jumper was not connected to the Uln driver.

[@BasonTech]

Great to hear you've solved it, thanks for sharing! 😃

[@OregonDARRYL]

Line 29 reads "degrees per revolution"... when I think you meant "degrees per one full step".

[@BasonTech]

Hi Darryl, 1 revolution is 360 degrees. It has 64 steps per revolution. 360 / 64 = 5.625 degrees per revolution. This is the same as degrees per one step.

[@OregonDARRYL]

@@BasonTech 360 degrees per one revolution. 5.625 degrees per step. Line 27 in your code says "5.625 degrees per revolution". That is incorrect. Good video though. Thanks.

[@Marco.Malatesta]

hello and congratulations for the video, I need the same code but for 2 motor steppers, do you know what I should modify? thanks and good day.

[@BasonTech]

It is basically the same code. You define another 4 pin variables e.g. motor2Pin1, motor2Pin2 etc. And create a second instance of the stepper like: AccelStepper stepper2(AccelStepper::HALF4WIRE, motor2Pin1, motor2Pin3, motor2Pin2, motor2Pin4); Instead of stepper.setMaxSpeed(1000.0); your now use stepper2.setMaxSpeed(1000.0); So everything works the same but now you have two instances: stepper and stepper2. Hope this helps :)

[@BasonTech]

@@Marco.Malatesta On arduino-tutorials.net there is a contact button which you can use :)

[@Marco.Malatesta]

@@BasonTech Hi, after many tests I managed to modify the code, now it works well, thank you for the help you have given me, bye.

[@BasonTech]

Great! Unfortunately this is the best way to learn stuff ;)

[@Koto-Sama]

2:44 this is incorrect for this type of motor

[@BasonTech]

Thanks for your remark, I've removed the scene from the video

[@Koto-Sama]

@@BasonTech thx

[@santhosheaswaramoorthy8685]

Why are you using power plug?

[@BasonTech]

You want to separate the motor current form the Arduino current. The high peaks might damage your Arduino. Therefore I make the motor power go completely separated from the Arduino one.

[@nadavdanieli]

It moves 90 degrees, (as defined in the code) :)😝

[@BasonTech]

Great! 😃