Datasheet BYJ48 Stepper Motor - All

8/18/2019 Datasheet BYJ48 Stepper Motor - All

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Stepper Motor is a motor controlled by a series of electromagnetic coils. The

center shaft has a series of magnets mounted on it, and the coils surrounding

the shaft are alternately given current or not, creating magnetic fields which

repulse or attract the magnets on the shaft, causing the motor to rotate.

This design allows for very precious control of the motor,There are two basic

types of stepper motors, unipolar steppers and bipolar steppers .

In This instructable , I will talk about an Unipolar Stepper Motor 28-BYJ48 .

The unipolar stepper motor has five or six wires and four coils (actually two coils

About This Instructable

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Mohannad Rawashdeh(/member/Mohannad+RaMohannad Rawashdeh(http://www.genotronex.com/)

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BYJ48 Stepper Motor by Mohannad Rawashdeh (/member /Mohannad+Rawashdeh/)

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divided by center connections on each coil). The center connections of the coils

are tied together and used as the power connection. They are called unipolar

steppers because power always comes in on this one pole.

Step 1: Specification , Motor Driver

There are many Types of Drivers , L293 , ULN2003 , A3967SLB

(https://www.sparkfun.com/datasheets/Robotics/A3967.pdf), And More ,

The 28-BYJ48 Even comes with Breakout using ULN2003 As a Motor driver

chip .

Show All Items

28BYJ-48 Stepper Motor

Control System Based On

Arduino With ULN2003 Chip

(/id/28BYJ-48-Stepper-Motor-

Arduino Library for 28BYJ-48

Stepper Motor and ULN2003

Driver (/id/Arduino-Library-

for-28BYJ-48-Stepper-Motor-

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3/21

Specification for this Motor " And you can download datasheet from the

attachment "

Rated voltage 5VDC

Number of Phase 4

Speed Variation Ratio 1/64

Stride Angle 5.625° /64

Frequency 100Hz

DC resistance 50Ω±7%(25℃)

Idle In-traction Frequency > 600Hz

Idle Out-traction Frequency > 1000HzIn-traction Torque >34.3mN.m(120Hz)

Self-positioning Torque >34.3mN.m

Friction torque 600-1200 gf.cm

Pull in torque 300 gf.cm

Insulation grade A

and the schematics of This breakout shown like the Pictures on the attachment

Note that if you want to use L293 Instead of ULN2003 , You will need to leave

Red wire No connection .

Materials :

you will need :

1) Arduino Board .

2) BYJ48 Stepper Motor 5v

3) ULN2003 Moror driver Module

4) Jumper .

5) 5v voltage source "Optional" .

28BYJ-48.pdf (/files/orig/FQY/RHST/HMVJ7U24/FQYRHSTHMVJ7U24.pdf)

Step 2: Arduino Code .

http://www.instructables.com/files/orig/FQY/RHST/HMVJ7U24/FQYRHSTHMVJ7U24.pdf


4/21

The Arduino IDE Support a Library for Stepper Motor , Very Easy to use , After

Connect Motor with arduino You can Upload the Sketch on to the arduino .

But ...

You must take something in consider :

This Motor has a Gear ratio of 64 , and Stride Angle 5.625° so this motor has a

http://www.instructables.com/file/FZGPTQ4HMMF4Z5S/http://www.instructables.com/file/FEOP930HMMF4Z5R/http://www.instructables.com/file/FB6LOAWHMMF4Z5Q/http://www.instructables.com/file/FT68TVVHMMF4Z5P/http://www.instructables.com/file/FXRWP1EHMMF4Z5O/


5/21

4096 Steps .

steps = Number of steps in One Revolution * Gear ratio .

steps= (360°/5.625°)*64"Gear ratio" = 64 * 64 =4096 . this value will

substitute it on The arduino Sketch

For adafruit Stepper Motor (http://www.adafruit.com/products/918) , the Stride

Angle 7.5° and Gear ratio is 16 , So number of steps in 1 Revolution is :

steps in One Revolution = 360 / 7.5 = 48 .

steps= 48 * 16 = 768

That's will be different depend on what motor you are using , So check The

Datasheet for Your stepper Motor to calibrate this values

28-BYJ48 Motor Datasheet (http://robocraft.ru/files/datasheet/28BYJ-

48.pdf).

Motor Driver ULN2003 BreakOut Connected To Arduino From IN1 - IN4 To D8 -

D11 Respectively

To Power you Motor , Recommanded to use external Power Supply with 5V-500mA at least , Don't power it directly from arduino Board 5V .

Step 3: Library Direction Issue ... And how to fix it .

When You Upload the sketch to the arduino , The Motor will Be rotate in one

direction By type the command :

step(steps);

http://www.instructables.com/file/FG9S3MRHMWVZNZR/http://www.instructables.com/file/FBD8BUKHMWVZNZQ/http://robocraft.ru/files/datasheet/28BYJ-48.pdfhttp://www.adafruit.com/products/918


6/21

So you must Put the Number of step to turn the motor .

The reference (http://arduino.cc/en/Reference/StepperStep) said You can put

the positive value to turn one direction, negative to turn the other.

If that's OK With Your stepper Motor , You don't need to read the following .

If Not , Your Motor turn to same direction even you Put the steps Positive Value

or negative , What is the issue ?

This Motor need to operate as the Table on the attachment .

the arduino Stepper Library need to modify to match this requirement .

I wrote a code which is allow to this motor to Move clockwise and counter clock

wise

Code in the next step :

Step 4: Modify Code

the final code for this Stepper motor :

http://www.instructables.com/file/FV9LEN8HMWVZP97/http://arduino.cc/en/Reference/StepperStep


7/21

/*

BYJ48 Stepper motor code

Connect :

IN1 >> D8

IN2 >> D9

IN3 >> D10

IN4 >> D11

VCC ... 5V Prefer to use external 5V Source

Gnd

written By :Mohannad Rawashdeh

http://www.instructables.com/member/Mohannad+Rawashdeh/

28/9/2013*/

#define IN1 8

#define IN2 9

#define IN3 10

#define IN4 11

int Steps = 0;

boolean Direction = true;// gre

unsigned long last_time;

unsigned long currentMillis ;

int steps_left=4095;

long time;

void setup(){

Serial.begin(115200);

pinMode(IN1, OUTPUT);




// delay(1000);

}

void loop()

{

while(steps_left>0){

currentMillis = micros();if(currentMillis-last_time>=1000){

stepper(1);

time=time+micros()-last_time;

last_time=micros();

steps_left--;

}

}

Serial.println(time);

Serial.println("Wait...!");

delay(2000);

Direction=!Direction;

steps_left=4095;

}

void stepper(int xw){

for (int x=0;x


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digitalWrite(IN3, HIGH);


break;

case 2:

digitalWrite(IN1, LOW);




break;

case 3:


digitalWrite(IN2, HIGH);digitalWrite(IN3, HIGH);


break;

case 4:





break;

case 5:



digitalWrite(IN3, LOW);digitalWrite(IN4, LOW);

break;

case 6:





break;

case 7:




digitalWrite(IN4, HIGH);break;

default:





break;

}

SetDirection();

}

}

void SetDirection(){

if(Direction==1){ Steps++;}if(Direction==0){ Steps--; }

if(Steps>7){Steps=0;}

if(Steps


9/21

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Please be positive and constructive. w I Made it! Add Images Post Comment

Reply7 days ago

Reply4 days ago

Reply6 days ago

Reply6 days ago

Stepper Motor 28 BYJ48 Arduino

rabiuls (/member/rabiuls)

Thank you very much, it works!! But the stepper motor gets

very hot, I am using 12v. Is it ok?

Alderin (/member/Alderin) .


It is very common for stepper motors to get hot. Many 3d printer and CNC

mill designs include heatsinks and fans on each stepper motor, and inrobust designs a temperature sensor is added to each stepper to allow the

control circuits to shut down before the motor is damaged.

he ULN2003 is pretty much just an amperage amplifier that steps up the

rduino's power signal to be enough for the motor. Specialized stepper

motor drivers have different amperage settings for 'moving' and 'holding'states, which can drastically lower heat and power usage. They are a bit

more expensive, though.

ith that all said, the typical use for this stepper motor does not have a

dedicated fan, and generally no temperature based shut-off. It is probably

not getting too hot for its design, but if you are concerned, adding a 40mman ( like this one: http://www.digikey.com/product-detail/en/sunon-

ans/HA40101V4-000U-999/259-1616-ND/3694183 ) wouldn't hurt.

nbc12 (/member/nbc12) .


Depends on your amperage, though it is normal for steppers to get a little

warm, so you're probably fine

AbuM12 (/member/AbuM12)

hello

http://www.instructables.com/member/AbuM12http://www.instructables.com/member/rabiulshttp://www.instructables.com/member/nbc12http://www.instructables.com/member/rabiulshttp://www.instructables.com/member/Alderinhttp://www.instructables.com/member/rabiulshttps://www.youtube.com/watch?v=6zlxlOrSh-Q


10/21

Replya month ago

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8

Its mostako, I am very new to stepper motor control with Arduino.

I need to rotate my stepper motor 28byj-48, ULN2003 driver IC both in forward and in reverse direction when the

respective push button is pressed.

I have I have a stepper motor, ULN2003, arduino and two

push button

Please provide me a code for arduino such that i can rotate

the stepper in both direction only when push button is

pressed

My email id is [email protected]

CaptainZ (/member/CaptainZ)

Thanks, just what I needed to make sure my board wasgood. I changed the pins to the ones for a nano and it

started right up.

Meterry52 (/member/Meterry52)

Cool project! Only took minutes to get it going! Thank you!!!!

WillandsometimesWendyK (/member/WillandsometimesWendyK)

This was great! Helped me a lot - thank you muchly!

Thank you for posting this. My steppers had the direction problem so your fix is

greatly appreciated.

(http://cdn.instructables.com/FUN/PU82/IKVFUWCJ/FUNPU82IKVFUWCJ.LARGE.jpg)

rizawerks (/member/rizawerks)

thanks for tutorial :)

TheElectromania (/member/TheElectromania)

Worked perfectly... can you please put comments on your

sketch code, to understand the logic.

I would like to control speed and rotate it 360deg

JamalN1 (/member/JamalN1)

MarcusBlaisdell (/member/MarcusBlaisdell) made it!

http://www.instructables.com/member/MarcusBlaisdellhttp://www.instructables.com/member/JamalN1http://www.instructables.com/member/TheElectromaniahttp://www.instructables.com/member/rizawerkshttp://cdn.instructables.com/FUN/PU82/IKVFUWCJ/FUNPU82IKVFUWCJ.LARGE.jpghttp://www.instructables.com/member/WillandsometimesWendyKhttp://www.instructables.com/member/Meterry52http://www.instructables.com/member/CaptainZ


11/21

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Reply5 months ago

Can you plz add commentals in the code to explain it

MartynSudworth (/member/MartynSudworth)

My setup would do nothing until i realised the pin marked

"+" wasn't actually connected to anything (on the motor board). When i connected 5v to both the two pins

previously jumpered together (like your image above) itburst into life. Do i have a badly designed motor board?

MartynSudworth (/member/MartynSudworth) .

MartynSudworth

(/member/MartynSudworth)

on further examination i find this: pin 1 (marked "-") is

ground, as it should be). Pin 2 (marked "+") not

connected. Pin 3 is connected to "com" on uln chip,so should be 5v. Pin 4 connected through the LEDs

to the motor a to the uln outputs. I put 5v on this aIso.Implies you can split the power to drive a different

power stepper? Odd, what do people think?

CalvT1 (/member/CalvT1)

Many thanks, works well.

aurelien.a.walker (/member/aurelien.a.walker)

Hello,

And thanks for your help. Now i understand :-)

I try to do a program who control my motor with a pusher

button.

When i push the button, i would that my motor do a step of

25°.

Could you help me?

MatthewW80 (/member/MatthewW80)

Hi, I have followed your instructions and it worked fine. I

have built on your code and make what I think to be a

neater implementation. Here is my github repo with it in,hope someone finds it useful.

https://github.com/mattcow12/BYJ48-Stepper/tree/master

JonGolcha (/member/JonGolcha) .

MatthewW80 (/member/MatthewW80)

Thanks for sharing your code Matthew, this is indeed

useful :)

malijai (/member/malijai)

http://www.instructables.com/member/malijaihttp://www.instructables.com/member/MatthewW80http://www.instructables.com/member/JonGolchahttp://www.instructables.com/member/MatthewW80http://www.instructables.com/member/aurelien.a.walkerhttp://www.instructables.com/member/CalvT1http://www.instructables.com/member/MartynSudworthhttp://www.instructables.com/member/MartynSudworthhttp://www.instructables.com/member/MartynSudworth


12/21

Thanks for your code. I managed to have my Uno control the same

stepper motor, whereas I could not with other examples. The code could

be made simpler though.

Here is my attempt, using arrays, renaming variables and simplifying control

/*BYJ48 Stepper motor code

Connect :IN1 >> D8

IN2 >> D9

IN3 >> D10IN4 >> D11

VCC ... 5V Prefer to use external 5V SourceGnd

written By :Mohannad Rawashdeh

http://www.instructables.com/member/Mohannad+Rawashdeh/28/9/2013

*/

#define IN1 8

#define IN2 9#define IN3 10

#define IN4 11

const int NBSTEPS = 4096;const int STEPTIME = 900;

int Step = 0;boolean Clockwise = true;

int arrayDefault[4] = {LOW, LOW, LOW, LOW};

int stepsMatrix[8][4] = {{LOW, LOW, LOW, HIGH},

{LOW, LOW, HIGH, HIGH},

{LOW, LOW, HIGH, LOW},{LOW, HIGH, HIGH, LOW},

{LOW, HIGH, LOW, LOW},{HIGH, HIGH, LOW, LOW},

{HIGH, LOW, LOW, LOW},

{HIGH, LOW, LOW, HIGH},};

unsigned long lastTime;

unsigned long time;

void setup(){

Serial.begin(9600);Serial.println("Starting...");


pinMode(IN2, OUTPUT);pinMode(IN3, OUTPUT);

pinMode(IN4, OUTPUT);}

void loop(){unsigned long currentMicros;

int stepsLeft = NBSTEPS;time = 0;

while(stepsLeft > 0){

currentMicros = micros();if(currentMicros - lastTime >= STEPTIME){

stepper();time += micros() - lastTime;

lastTime = micros();

stepsLeft--;}


13/21

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}Serial.println(time);

Serial.println("Wait...!");

delay(2000);Clockwise = !Clockwise;

stepsLeft = NBSTEPS;}

void writeStep(int outArray[4]){for (int i=0;i < 4; i++){

digitalWrite(IN1 + i, outArray[i]);

}

}

void stepper(){

if ((Step >= 0) && (Step < 8)){

writeStep(stepsMatrix[Step]);}else{

writeStep(arrayDefault);}

setDirection();

}

void setDirection(){(Clockwise) ? (Step++) : (Step--);

if(Step>7){Step=0;

}else if(Step


14/21

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Reply6 months ago

My stepper motor seem to be broken.. or do i have a power problem? It only

turns when i give it a little help... rest works fine.... it only vibrates if i dont help it

turn with my fingers.. so guess its broken... that sucks

GavinS11 (/member/GavinS11) .

vandenbrande (/member/vandenbrande)

Make sure your pins are mapped right. Mine was doing thatbecause I had pins 8 & 9 flipped

vandenbrande (/member/vandenbrande) .

GavinS11 (/member/GavinS11)

Yes i know i used 2 blue cables and i wasnt sober lol.... but thanks see my other comment that i left

after that... it works fine..


Fixed it.. just being stoned.. used 2 blue cables lol.. and

gues what? i put in3 on pin 11

and in4 on pin 10... lol ok then nothing broken here

vandenbrande (/member/vandenbrande) .


And thanks man! nice tutorial mohannad

jaysonl ooi (/member/jayson looi)

Hello guys, I'm new here. May I know where can i get

stepper motor's library? TQ

AshleyO3 (/member/AshleyO3)

Your tutorial is helping me a lot in my project! I'm just a

beginner, and this is one of my first circuits I'm building in

real life. Can OP or someone tell/show me how thisexample connects to a power supply since I have an

ardunio nano instead of the arduino uno used in thisexample?

Sorry, I'm really new and this is all so confusing for me!

LaurensHuizer (/member/LaurensHuizer) .

AshleyO3 (/member/Ashley O3)

Hi AshleyO3,

I recommend you to use a PC power source,

especially is you are using multiple stepper motors inyour setup. You can connect the driverboard VCC pin

to a red wire and the GND pin to a black wire. I'vecreated a class to control your PC power source:

http://www.laurenshuizer.nl/blog/arduino/power-

http://www.laurenshuizer.nl/blog/arduino/power-source-libraryhttp://www.instructables.com/member/AshleyO3http://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/AshleyO3http://www.instructables.com/member/jaysonlooihttp://www.instructables.com/member/vandenbrandehttp://www.instructables.com/member/vandenbrandehttp://www.instructables.com/member/vandenbrandehttp://www.instructables.com/member/GavinS11http://www.instructables.com/member/vandenbrandehttp://www.instructables.com/member/vandenbrandehttp://www.instructables.com/member/GavinS11


15/21

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source-library(http://www.laurenshuizer.nl/blog/arduino/power-

source-library).

AshleyO3 (/member/AshleyO3) .

LaurensHuizer (/member/LaurensHuizer)

Thank you, but I need a way to attach a battery pack power

source so I can transport my circuit around! Any suggestions

for that at all? I'm using an Arduino Nano >_>

LuisF37 (/member/LuisF37) .

Ashley O3 (/m ember/AshleyO3)

If you look at the picture of the controller, there are two pins,marked - and +, with 5-12V. That's it.

DonD10 (/member/DonD10)

I want to make an arduino-based robotic tripod head (for a

DSLR - for panoramic & 360 degree photos), but I havenever actually used a stepper motor before. I have one

(same as yours) from a kit & plan to order a couple more(need to use 2; 1 sideways & 1 up & down), but I'm not

sure the best way to attach (whatever) to the 'spinny part'

of the motor :)

Any thoughts / direction? I'm brand-new to messing with

Arduinos (I have an UNO and a couple ATTINY85 boards)and so far have only lit LEDs, so maybe this is too

ambitious ... but commercial robotic heads are almost$1000 & my budget is closer to $20 :)

Thank you very much for this priceless example ! I had a trouble to run mystepper motor 28BYJ-48 with ULN2003 with standard "stepper" library of the

latest Arduino IDE :( It make a few steps and stuck with a big current... After Itried your way and everything is nice ! :) After I decided to look at logic levels on

pins from IN1 to IN4 in both situations. As I see the library function "step" run in

1 full phase, and your code run motor in 1/2 phase, as your wrote. I attached 4screenshots of your code CCW and CW rotating in 2 different time/div and a

screenshot of the library function.

My question is : are you think that the first (library) function correct for this

(http://cdn. instructables.com/FR3/JDCK/IFUEFLAP/FR3JDCKIFUEFLAP.LARGE.jpg)

binobino (/member/binobino) made it!

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16/21

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Reply6 months ago

(http://cdn.instructables.com/FZO/NIIK/IFUEFL9Z/FZONIIKIFUEFL9Z.LARGE.jpg)

(http://cdn.instructables.com/FYC/4Q18/IFUEFL7N/FYC4Q18IFUEFL7N.LARGE.jpg)

(http://cdn.instructables.com/F9M/5J4F/IFUEFL7K/F9M5J4FIFUEFL7K.LARGE.jpg)

(http://cdn.instructables.com/FU2/95L1/IFUEFL2D/FU295L1IFUEFL2D.LARGE.jpg)

binobino (/member/binobino) . binobino (/member/binobino)

Sorry, the screenshots are misplaced when upload - the

LAST screenshot is from a library function "step"....


binobino (/member/binobino)

Hi binobino,

I've created an object oriented library to control your BYJ48stepper motor:

https://github.com/LaurensHuizer/Arduino/tree/master/libraries(https://github.com/LaurensHuizer/Arduino/tree/master/librarie

binobino (/member/binobino) .


Great thanx, Laurens!


If you want to control you stepper motor in an object

oriented way, you can view my blogposthttp://www.laurenshuizer.nl/blog/arduino/stepper-motor-

http://www.laurenshuizer.nl/blog/arduino/stepper-motor-libraryhttp://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/binobinohttps://github.com/LaurensHuizer/Arduino/tree/master/libraries/StepperMotorhttp://www.instructables.com/member/binobinohttp://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/binobinohttp://www.instructables.com/member/binobinohttp://cdn.instructables.com/FU2/95L1/IFUEFL2D/FU295L1IFUEFL2D.LARGE.jpghttp://cdn.instructables.com/F9M/5J4F/IFUEFL7K/F9M5J4FIFUEFL7K.LARGE.jpghttp://cdn.instructables.com/FYC/4Q18/IFUEFL7N/FYC4Q18IFUEFL7N.LARGE.jpghttp://cdn.instructables.com/FZO/NIIK/IFUEFL9Z/FZONIIKIFUEFL9Z.LARGE.jpg


17/21

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6 months ago

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6 months ago

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X

8

Reply7 months ago

Reply8 months ago

library (http://www.laurenshuizer.nl/blog/arduino/stepper-motor-library).

binobino (/member/binobino) .


Thank you very much, Laurens for great explanation, work

and library! It was very useful for me !

M.razik (/member/M.razik)thanks for the explaining, but i have a problem after using Ur

code and the same pin out the motor is make a vibratesound ! .. and don't turn .. !? and i have a question ? how

can i tell the stepper motor to start point at a defined degree(0)deg or step and from it go to (180) deg (90)deg ... etc. I

wonder if you can help me ... thanks in advance :)


M.razik (/member/M.razik)

Hi M.razik,

This is probably because the motor doens't get enoughpower. I recommend you to use an external power supply

LuisF37 (/member/LuisF37) .

M.razik (/member/M.razik)

For that, you should calculate the number of steps to reach these angles,based on the number of steps/turn. Or (which seems more elegant for

your case) would be using a servo motor instead.

http://www.instructables.com/id/Arduino-Servo-Motors/

Mohannad Rawashdeh (/member/Mohannad Rawashdeh) (author) .

M.razik

(/member/M.razik)

Check your connection again , I tested before .

Yes you can

AhmeedS (/member/AhmeedS)

I put this together and it's really cool thank you. Before your explanation I was

lost and almost burned up a motor. Is your code documented anywhere? Itworks great, but it's a bid advanced for me... So is lighting LEDs... hahahaha

Thank you again, I would recommed this project to everyone.

Billdwp (/member/Billdwp) made it!

http://www.instructables.com/member/Billdwphttp://www.instructables.com/member/AhmeedShttp://www.instructables.com/member/M.razikhttp://www.instructables.com/member/Mohannad%20Rawashdehhttp://www.instructables.com/member/M.razikhttp://www.instructables.com/member/LuisF37http://www.instructables.com/member/M.razikhttp://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/M.razikhttp://www.instructables.com/member/LaurensHuizerhttp://www.instructables.com/member/binobinohttp://www.laurenshuizer.nl/blog/arduino/stepper-motor-library


18/21

Reply

7 months ago

Reply

7 months ago

Reply8 months ago

Reply8 months ago

(http://cdn.instructables.com/FH0/4Q0K/IE184JN4/FH04Q0KIE184JN4.LARGE.jpg)

AshleyO3 (/member/AshleyO3) . Billdwp (/member/Billdwp)

wesome set up! I'm trying to do something similar for my

project here. Do you mind showing me or telling me whatsgoing on with the power supply? Like, how you have the

power supply connected to the breadboard and arduino and

driver board?

AshleyO3 (/member/AshleyO3) .

Ashley O3 (/m ember/AshleyO3)

Oh, I should add it's because I have an ardunio nano insteadof the uno!

Thanks for your code! I used it to make an Arduino Bumper Robot! Check it outhere if you want your own: http://www.instructables.com/id/Super-simple-and-

S... (http://www.instructables.com/id/Super-simple-and-Super-cheap-Arduino-Bumper-robot-/)

(http://cdn.instructables.com/F9M/FJL6/IEB8DYQB/F9MFJL6IEB8DYQB.LARGE.jpg)

JoshS38 (/member/JoshS38)

Hi, I am using a motor from the same family as this one

(24BYJ48) I am using the Adafruit library to control the

stepping motor.

The issue I am having is running the motor at Full Speed.

Here is my code:

#include

#include

#include "utility/Adafruit_PWMServoDriver.h"

// Create the motor shield object with the default I2Caddress

Adafruit_MotorShield AFMS = Adafruit_MotorShield();

// Or, create it with a different I2C address (say for

stacking)

sourcery (/member/sourcery) made it!

http://www.instructables.com/member/sourceryhttp://www.instructables.com/member/JoshS38http://cdn.instructables.com/F9M/FJL6/IEB8DYQB/F9MFJL6IEB8DYQB.LARGE.jpghttp://www.instructables.com/id/Super-simple-and-Super-cheap-Arduino-Bumper-robot-/http://www.instructables.com/member/AshleyO3http://www.instructables.com/member/AshleyO3http://www.instructables.com/member/Billdwphttp://www.instructables.com/member/AshleyO3http://cdn.instructables.com/FH0/4Q0K/IE184JN4/FH04Q0KIE184JN4.LARGE.jpg


19/21

Reply8 months ago

Reply8 months ago

Replya year ago

// Adafruit_MotorShield AFMS = Adafruit_MotorShield(0x61);

// Connect a stepper motor with 200 steps per revolution(1.8 degree)

// to motor port #2 (M3 and M4)

Adafruit_StepperMotor *myMotor = AFMS.getStepper(200,

2);

void setup() {

Serial.begin(9600); // set up Serial library at 9600 bps

Serial.println("Stepper test!");

AFMS.begin(); // create with the default frequency 1.6KHz

//AFMS.begin(1000); // OR with a different frequency, say

1KHz

myMotor->setSpeed(100); // 10 rpm

}

void loop() {

Serial.println("Microstep steps");

myMotor->step(50, FORWARD, MICROSTEP);

}I am very new to arduino so would appreciate the help :)

I just put this together on a 'Moteino' small wireless arduino clone. It worksperfectly with no alterations to the code at all. I am making an automatic

chicken coop door, and will monitor a few things (temp, humidity, water & foodconsumption) to provide data back to a base Raspberry Pi. This will (I hope)

open & close the door mechanism, but even if the motor proves not strong

enough it has taught me what I need to know, thanks!

(http://cdn.instructables.com/FDV/SAEC/IE4ZU9FU/FDVSAECIE4ZU9FU.LARGE.jpg)

humphrey.lees (/member/humphrey.lees)

I have the motor working as I write. I think it can be usedfor my coil winder that is using a dc motor and encoder.

How can I stop the pause and control the speed andduration?

urkraft (/member/urkraft)

Thank you for the information, but i believe that the code wasoverly complicated. I simplified it dramatically and my code

worked great as well as being much simplier to understand.

Here is my suggestion:

Domonsura (/member/Domonsura) made it!

http://www.instructables.com/member/Domonsurahttp://www.instructables.com/member/urkrafthttp://www.instructables.com/member/humphrey.leeshttp://cdn.instructables.com/FDV/SAEC/IE4ZU9FU/FDVSAECIE4ZU9FU.LARGE.jpg


20/21

const char posArray[9] = { 0x08, 0x0C, 0x04, 0x06, 0x02,0x03, 0x01, 0x09 };

void setup() {// put your setup code here, to run once:

DDRB = 0xFF;}

void loop() {// put your main code here, to run repeatedly:

int pos;

int skritt;for (pos = 0; pos < 512; pos++) {for (skritt = 0; skritt < 8; skritt++) {

PORTB = posArray[skritt];

delay(1);}

}

delay(1000);

for (pos = 512; pos > 0; pos--) {for (skritt = 7; skritt > -1; skritt--) {

PORTB = posArray[skritt];delay(1);

}}

delay(1000);}

I

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Documents

Datasheet BYJ48 Stepper Motor - All