Hey Brad, I just took one of those tiny steppers from the laser sled of a BR player - it looks like it about half the size of the one you have here. The coils are about 4mm in diameter and the motor is 4.5mm long.
The motors are cool but I think the real amazing thing is that you got that programer working, I just got mine and am having alot of difficulty getting it working.
I followed this guide from sparkfun. If you are sure that you installed the the USBTinyISP Driver and added the ATtiny Addon to be able to get the ATTiny menu in arduino, you may just have a bad programmer or bad ATTiny85 chip. Hope this helps. learn.sparkfun.com/tutorials/tiny-avr-programmer-hookup-guide/?_ga=1.73937754.999866103.1422042233
Brad Focht Thanks so much for this... I'd ordered a pack of 10 off Amazon and just started playing with them... I'm new to Arduino and electronics (but not programming). If nothing else, your wiring solution helps me a lot since I am finding the soldering to be problematic - I'm not good at it either. I'm going to try an LD293D shield and the EasyDriver motor driver. I will also be interested in how much torque these little guys deliver. I'm so glad I kept looking through the videos and found this! Thanks!
Not much torque from mpu pins. I did do half-steps. Using some transistors, or a h-bridge would be more useful. I had bought a box full of these. Cool to play with, though.
I actually didnt solder these. I wrapped thin braided aluminum wire around the terminals then pulled the wires around then used heat shrink to hold the wires around. If you wanted to solder them I would highly recommend a very small solder tip with an adjustable solder iron with flux. Also, very fine solder. I might be able to make a quick video.
Hi Brad, thanks for the video and links! I am buying 20 of these, for one of my project. Any idea about the torque and power output of these motors? I am planning to design a custom 3D printed gearbox to be used with these motors to get a higher torque.
@Shaikh Since there is no data sheet I do not know. The retailer said that they were 3-5 volts.When using 3.3 volts, they are stronger than I thought they would be. Under 5v, they are probably even stronger. I wouldn't say they have a lot of torque but they do have a decent amount. I thought they would be very weak but they are about as strong they look. Hope that helps!
+Brad Focht, thanks for the feedback. As I am planning to use 20 of these in parallel. Any idea of the current consumption by each motors? Would helpful in calculating the total ampere required for the whole circuit?
@@aivin8123 These are the same but have a gear and slide on them. $5 for 30 of them. www.aliexpress.com/item/32921510787.html?spm=2114.search0204.3.20.2f642317AbxMo3&ws_ab_test=searchweb0_0%2Csearchweb201602_10_10065_10130_10068_10547_319_10546_317_10548_10545_10696_10084_453_454_10083_10618_10307_537_536_10059_10884_10887_321_322_10103%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=7778b486-ade5-4d53-84ed-9d1f2e5ffd8e-3&algo_pvid=7778b486-ade5-4d53-84ed-9d1f2e5ffd8e&transAbTest=ae803_3
Is it possible to still order the stepper motor from the company? Is it possible to program the chip so that the motor rotates in one direction and at a certain rate?
I have a hard time trying to solder these :/ I only need one to work, 7 attempts remaining. (Aim is to to turn a pressure gauge into a temperature gauge, Arduino, bmp280 and one of these small steppers)
Use smaller solder wire and lower the iron temp. Clean solder tip well then add a tiny bit of solder to the small leads and to the wire. Then you can just touch them together and apply heat. I managed to get the technique down and it works.
Dear Sir Thank you for this work Could you please explain the connection of your circuit in terms of motor pins connections as they not very clear and which code have you used. Is it possible to share your code please?
The code is in the description: 42bots.com/tutorials/bipolar-stepper-motor-control-with-arduino-and-an-h-bridge/ You will need a multimeter to identify which coils are on which pins. In the link above, it will show you the way a bipolar stepper motor works. You will need to test your motors electrical leads to identify which coil is "A" and which is "B". If you use your multimeter in continuity mode or resistance mode, find which one of the electrical leads are connected. If you dont have a multimeter, these motors typically have the same setup (use multimeter to be certain). If you hold the motor with the shaft horizontal to the floor and the output shaft ( parts the spins) is pointing left, then the first coil ouput pins will be the first colored pair of pins to the right of the output shaft (coil A) . The next pair will be coil B towards the back of the motor. If you have the polarity reversed, I dont think it will hurt anything so feel free to test and move them around. Hope that helps.
Thank you very much Sir it is helpful but when I define pins 2 and 3 of the ATtiny for pins A1 and A2 of the motors and the pins 6 and 5 for B1 and B2, the motor spin only during the uploading the code but it stopped.Even when I checked it outside the AVR it does not spin. I have used the first code in the description so is there any suggestions please?
Since the motor is moving, that is a good indication that you have the pins/coils lined up correctly. To make sure, check the link below for another simple sketch. Read through carefully. Also, for the motors this small, you don't need the darlington array or H-Bridge describe in the article. Hope this helps. www.arduino.cc/en/Tutorial/StepperOneStepAtATime
ALSO! I noticed that sometimes these would stop. Try turning the output shaft a little to get it started. Since the usual output amperage of an arduino is around 20-30 milliamps, it may need help to get started. If the h-bridge is used, that will amplify the signal.Let me know your progress and what you did to fix it. I am curious.
I'm thinking about using these to make a mini linear actuator. Do you think these stepper motors would be strong enough to turn, for example, a 40mm x 2mm steel threaded rod? And do you know what the maximum RPM is?
I am not sure how much torque these have or what your application would need.They are so cheap it's probably worth trying.They do not have a datasheet that I know of so I am not sure of the rpm.
I also just thought of this. I ordered another lot of 10 that actually had a 9-10mm threaded rod already pressed on. I think these are used for linear movement for dvd/blueray focusing lenses. The link is below. I think these are just a little bigger and seem to be built a little better.This would probably be your best choice. www.aliexpress.com/snapshot/6386443522.html?orderId=64951371238307
Brad Focht Thanks for the response and the suggestion! It's worth a try, the linear actuator is meant to move and control a small arm in a robotics project so I hope these will be strong enough to at least move the threaded rod.
It's possible.The robot would have to be pretty small though.No datasheet was available but the manufacturer/distributor said that these run at 3-5 volts.
Is this motor silent? Can't tell if u removed the sound or it's as quiet as it is in the video. Can this servo be controlled directly via an arduino nano? This can turn in both clockwise and anti clockwise 360 degrees from the look of your video.
I think the recommended way to run these is through a stepper controller but I ran it directly off a chip without issues but there was no load on it. Stepper motors I think produce a lot of noisy voltage that isn't good for a chip but these are tiny and without a load, it didn't damage the attiny chip I used.
@@gearhed78 thanks, I'm looking for a silent replacement for my servo motors which makes extremely loud buzzing noises. But nothing is perfect, steppers lack a home position and like you said, probably will fry the chip if I ran it with load. I only need tiny ones to control tiny parts... but the back emf is a concern for me. Not sure how durable the arduino nano is if I didn't shield it.
Hey Brad, I got some and tried them. Wow, it's torque is abyssmal, how much torque do you think yours have? I just need to pull a 100 gram load. I'm using a driver as well. L9110S and DRV8825. No hope... it's torque is so weak, if I press against it, it pretty much stops. I'm not sure how to increase the torque...
Is there a way to control the stepper motors with steppers connected to JUST the attiny85 and not the USB AVR programmer. I understand that the USB programmer is helpful to get the program from the computer to the chip but once it’s on the chip I’d like to have a way of not relying on the USB. Would love to hear your thoughts on this
Yes. They work just fine connected to only the attiny. I had nothing but a tiny lipo connected to the chip and the stepper connected to the chip. I am sure it's not the proper way but it certainly works.
@@gearhed78 Hmmm ok. I've been having a heck of a time getting it to work. Is there a way I can email you a pic of the circuit I have setup on my breadboard? Also, what code are you using? Hope to be up and running soon. I've programmed the ATtiny using the Uno as an ISP and am running the ATtiny85 stepper library to make sure it all works. The code I used uploaded properly to the chip but I just can't get the stepper to move
@@vinceb121 Make sure to find coil A and coil B. Use a multimeter and touch the leads until you get continuity. When you find continuity between two of the motor leads, you have found either coil A or B. A or B is really irrelevant and any coil can be A or B just make sure it matches your sketch. The sketch I used is linked in the description I think.
Will be sending so you can see what I’m talking about! Really appreciate the help! If this helps at all or changes anything, I’m pretty sure it’s a bipolar stepper motor I’m using so there’s four wires coming off it: an A+, A-, B+, B- and it is very small...hang tight and I’ll send you a photo
I do not think it would have the torque. These were designed to adjust small focal lenses for cd/dvd players.Maybe with some gear reduction. I would at least test one for your project so know for sure.
I can't see any reason why you can't control it like that. These are not really that strong but for their size, they are pretty good. I would recommend looking at force sensitive resistor sketches closely and trying to find an example that you can adapt to your project.
driving a camera focus lens, robot eyes, tiny rolling robot, tiny robot finger. moving potentiometer on a mixing table. moving a microscope table, making small model mecanism, maling a small opening mecanism for secret book diary, open and close small valves. register and automate a keyboard knob button set...
+rodstartube They run at 3.3-5v not sure of the amperage or steps per revolution. I was not able to get a datasheet from the company I purchased them from.Guessing 20-30 steps per revolution. Guessing though.
I have been scratching my head about this for a while. You do not show an H-Bridge in the video, but the code you linked uses one. The code also references pins 2,4,6,7 for the stepper. That does not make sense to me because pin 4 is the ground. Possible the code link is not correct?
+George Miller It may have been changed a little but I got it to work with very little change from the original code. I would have to load this again on the Attiny to check. But yes, It did work with that code with little or no edits. Hope that helps. If you have the same setup and you are having issues I may be able to help. Other than that, try it out. No hbridge was ever used.
I could not. I wrecked 3 tiny steppers trying to solder leads for breadboarding. After the third, I got frustrated and gave up for the moment. I have 17 more, but I think I need better solder tips before I try again.
+pascuala sylleros Are you using example 2 in the sketches in the link that I provided? If that's the case, that sketch makes the assumption that you have a stepper with 48 steps per revolution. These tiny steppers probably only have 16 or so steps so that would make sense. The code sets a loop to increment the steps. Each step increments a counter and this counter is compared to the line of code below. If you change that to 16 instead of 48, it may complete one revolution then stop.Let me know if that does the trick. const int stepsPerRevolution = 48;
+Brad Focht thanks for answering. It Works oddly, after one or two trials it just stops working. I think the batery supply its the reason but I dont know how to change it, or what to do about it. My stepper work with 3.3v or 5v and the battery supply has to be from 6v to 12v. Maybe im overheating the stepper. Also I been trying with an easy driver but it didnt work. this are the links of what im doing: -www.instructables.com/id/Stepper-Motor-Easy-Driver/?ALLSTEPS -www.arduino.cc/en/Tutorial/StepperOneRevolution pd: sorry for the bad english!
Hey, I checked out the easy driver and found a great tutorial for this exact setup. I see in the link that you provided that the arduino is only using 2 pins (8 and 9). This link that I have shows the Sparkfun Easy Driver and how to set it up using all four outputs from the Arduino into the Easy Driver. I recommend this tutorial since it is specific to your driver and bipolar stepper. Also, I think your power supply should be just fine.Let me know if this works. learn.sparkfun.com/tutorials/easy-driver-hook-up-guide?_ga=1.42382305.557037760.1450388704
Also just noticed this very important note about the adjustment for the stepper amperage. I would recommend turning this all the way down to 150ma. "The potentiometer on board is included to allow users the ability to select the max current provided to the motor. It ranges from 150mA to 750mA. This will require you to be aware what current range your motor can handle - check the motor’s data sheet for the current settings."
Stepper motors themselves do not need programmed. However, they do need some logic on a chip to sequentially magnetize the poles. They are not like a normal brushed motor. You cannot apply a positive and a negative to drive them. Since they are able to change directions, they need a way to know how many turns to go and how fast. The chip that I have does exactly that. It sends the pulses of electricity into 2 sets of wires at very specific intervals. So, the chip needs to be programmed but not the actual motor. I left some information in the description about where to get everything and some resources about how this setup works.
@@gearhed78 Is it possible to still order the stepper motor from the company? Is it possible to program the chip so that the motor rotates in one direction and at a certain rate?
@@Y.O.L.O I think the link I put up is dead to order the stepper but I checked Alibaba.com and aliexpress and they are still available for VERY cheap. As far as a certain direction and speed. YES, you can do that. You just have to adjust the script. I left a link to the available steppers somewhere in the comments here for another person.
+Addi Anything you want! These were originally used for a dvd focusing lens I think.A tiny articulating arm? A tiny cnc machine? Tiny automatic etch-a-sketch?Anything tiny?
how do you know what coil is - , + ? from A and B ? i have this one www.ebay.com/itm/111625120317?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT and im trying to use the big easy driver from sparkfun and all i see in the board is A & B no + or - label pretty vague i try hitting you up on skype but i never catch you in time
+Sys.stem Hey, sorry you missed me. I just did a continuity test and discovered that the two pins closest to each other are a single coil. I detailed a pic here. imgur.com/kRxyQut
Hey Brad, I just took one of those tiny steppers from the laser sled of a BR player - it looks like it about half the size of the one you have here. The coils are about 4mm in diameter and the motor is 4.5mm long.
Yes, I believe these I have are focal lens steppers for CDROM/DVD/BR.
The motors are cool but I think the real amazing thing is that you got that programer working, I just got mine and am having alot of difficulty getting it working.
I followed this guide from sparkfun. If you are sure that you installed the the USBTinyISP Driver and added the ATtiny Addon to be able to get the ATTiny menu in arduino, you may just have a bad programmer or bad ATTiny85 chip. Hope this helps.
learn.sparkfun.com/tutorials/tiny-avr-programmer-hookup-guide/?_ga=1.73937754.999866103.1422042233
Awesome thanks
Brad Focht Thanks so much for this... I'd ordered a pack of 10 off Amazon and just started playing with them... I'm new to Arduino and electronics (but not programming). If nothing else, your wiring solution helps me a lot since I am finding the soldering to be problematic - I'm not good at it either. I'm going to try an LD293D shield and the EasyDriver motor driver. I will also be interested in how much torque these little guys deliver. I'm so glad I kept looking through the videos and found this! Thanks!
there's actually steppers like 1/2 or 1/3 that size I think
Brad, just what i needed to see!
They are just cool. All there is to it, heh.
Great demo!! -Where did you buy the motors? I can't find them on sparkfun...
Very COoL & tiny!! Thanks for bringing that to my/our attention... I WANT ONE (and I don't know why:). Cheers!
you never said and nobody asked: how many steps per revolution? thanks
20
Not much torque from mpu pins. I did do half-steps. Using some transistors, or a h-bridge would be more useful. I had bought a box full of these. Cool to play with, though.
The regular Arduino stepper library works fine with these.
@@davidharris7249 have you tried some A4988 stepper driver or similar?
@@rodstartube Yes, lots of choices now. For a simple animation, these might be fine directly from the pins, though.
any chance of a video showing how you soldered those they do look incredible for modelling
I actually didnt solder these. I wrapped thin braided aluminum wire around the terminals then pulled the wires around then used heat shrink to hold the wires around.
If you wanted to solder them I would highly recommend a very small solder tip with an adjustable solder iron with flux. Also, very fine solder. I might be able to make a quick video.
Hi Brad, thanks for the video and links!
I am buying 20 of these, for one of my project. Any idea about the torque and power output of these motors? I am planning to design a custom 3D printed gearbox to be used with these motors to get a higher torque.
@Shaikh Since there is no data sheet I do not know. The retailer said that they were 3-5 volts.When using 3.3 volts, they are stronger than I thought they would be. Under 5v, they are probably even stronger. I wouldn't say they have a lot of torque but they do have a decent amount. I thought they would be very weak but they are about as strong they look. Hope that helps!
+Brad Focht, thanks for the feedback.
As I am planning to use 20 of these in parallel. Any idea of the current consumption by each motors? Would helpful in calculating the total ampere required for the whole circuit?
No, sorry. There is no datasheet. I wish I knew more so I could share.
@@gearhed78 the link for stepper motor is expired . can you send me the link.
@@aivin8123 These are the same but have a gear and slide on them. $5 for 30 of them.
www.aliexpress.com/item/32921510787.html?spm=2114.search0204.3.20.2f642317AbxMo3&ws_ab_test=searchweb0_0%2Csearchweb201602_10_10065_10130_10068_10547_319_10546_317_10548_10545_10696_10084_453_454_10083_10618_10307_537_536_10059_10884_10887_321_322_10103%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=7778b486-ade5-4d53-84ed-9d1f2e5ffd8e-3&algo_pvid=7778b486-ade5-4d53-84ed-9d1f2e5ffd8e&transAbTest=ae803_3
Sir can we make self watering plant with soil moisture sensor and LCD display
pls reply me sir
Is it possible to still order the stepper motor from the company? Is it possible to program the chip so that the motor rotates in one direction and at a certain rate?
I have a hard time trying to solder these :/ I only need one to work, 7 attempts remaining. (Aim is to to turn a pressure gauge into a temperature gauge, Arduino, bmp280 and one of these small steppers)
Use smaller solder wire and lower the iron temp. Clean solder tip well then add a tiny bit of solder to the small leads and to the wire. Then you can just touch them together and apply heat. I managed to get the technique down and it works.
@@gearhed78 Thanks, I'll try that next!
Dear Sir
Thank you for this work
Could you please explain the connection of your circuit in terms of motor pins connections as they not very clear and which code have you used. Is it possible to share your code please?
The code is in the description: 42bots.com/tutorials/bipolar-stepper-motor-control-with-arduino-and-an-h-bridge/
You will need a multimeter to identify which coils are on which pins. In the link above, it will show you the way a bipolar stepper motor works. You will need to test your motors electrical leads to identify which coil is "A" and which is "B". If you use your multimeter in continuity mode or resistance mode, find which one of the electrical leads are connected.
If you dont have a multimeter, these motors typically have the same setup (use multimeter to be certain). If you hold the motor with the shaft horizontal to the floor and the output shaft ( parts the spins) is pointing left, then the first coil ouput pins will be the first colored pair of pins to the right of the output shaft (coil A) . The next pair will be coil B towards the back of the motor. If you have the polarity reversed, I dont think it will hurt anything so feel free to test and move them around. Hope that helps.
Thank you very much Sir it is helpful but when I define pins 2 and 3 of the ATtiny for pins A1 and A2 of the motors and the pins 6 and 5 for B1 and B2, the motor spin only during the uploading the code but it stopped.Even when I checked it outside the AVR it does not spin. I have used the first code in the description so is there any suggestions please?
Since the motor is moving, that is a good indication that you have the pins/coils lined up correctly. To make sure, check the link below for another simple sketch. Read through carefully. Also, for the motors this small, you don't need the darlington array or H-Bridge describe in the article. Hope this helps.
www.arduino.cc/en/Tutorial/StepperOneStepAtATime
ALSO! I noticed that sometimes these would stop. Try turning the output shaft a little to get it started. Since the usual output amperage of an arduino is around 20-30 milliamps, it may need help to get started. If the h-bridge is used, that will amplify the signal.Let me know your progress and what you did to fix it. I am curious.
I'm thinking about using these to make a mini linear actuator. Do you think these stepper motors would be strong enough to turn, for example, a 40mm x 2mm steel threaded rod? And do you know what the maximum RPM is?
I am not sure how much torque these have or what your application would need.They are so cheap it's probably worth trying.They do not have a datasheet that I know of so I am not sure of the rpm.
I also just thought of this. I ordered another lot of 10 that actually had a 9-10mm threaded rod already pressed on. I think these are used for linear movement for dvd/blueray focusing lenses. The link is below. I think these are just a little bigger and seem to be built a little better.This would probably be your best choice.
www.aliexpress.com/snapshot/6386443522.html?orderId=64951371238307
Brad Focht Thanks for the response and the suggestion! It's worth a try, the linear actuator is meant to move and control a small arm in a robotics project so I hope these will be strong enough to at least move the threaded rod.
Ronald Wijermars Did you ever give it a try? If so, how did it turn out?
Hi @Brad_Foshct, I know this video was made a long time ago but I need the stepper motor link
www.aliexpress.com/item/4000716891877.html?spm=a2g0o.productlist.0.0.51c01afev1HJJY&algo_pvid=29e8a280-c348-4787-b22a-b1ecf58cee5a&algo_expid=29e8a280-c348-4787-b22a-b1ecf58cee5a-6&btsid=0ab6d69f15908355771233481e5745&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
Does it have enough torque to move a small robot with tiny wheels? Do you have the datasheet with you? Thanks.
It's possible.The robot would have to be pretty small though.No datasheet was available but the manufacturer/distributor said that these run at 3-5 volts.
Hi, do you know the torque of this step-motor ?
No.
Thanks brad you the best
Is this motor silent? Can't tell if u removed the sound or it's as quiet as it is in the video. Can this servo be controlled directly via an arduino nano? This can turn in both clockwise and anti clockwise 360 degrees from the look of your video.
Yes, they are nearly silent. If you put it up to your ear, you might be able to hear it. I actually don't recall any noise.
I think the recommended way to run these is through a stepper controller but I ran it directly off a chip without issues but there was no load on it. Stepper motors I think produce a lot of noisy voltage that isn't good for a chip but these are tiny and without a load, it didn't damage the attiny chip I used.
@@gearhed78 thanks, I'm looking for a silent replacement for my servo motors which makes extremely loud buzzing noises. But nothing is perfect, steppers lack a home position and like you said, probably will fry the chip if I ran it with load. I only need tiny ones to control tiny parts... but the back emf is a concern for me. Not sure how durable the arduino nano is if I didn't shield it.
@@wyukigurumi Not sure if it would cook it. Maybe look for a tiny stepper driver or at least some flyback diodes.
Hey Brad, I got some and tried them. Wow, it's torque is abyssmal, how much torque do you think yours have? I just need to pull a 100 gram load. I'm using a driver as well. L9110S and DRV8825. No hope... it's torque is so weak, if I press against it, it pretty much stops. I'm not sure how to increase the torque...
Is there a way to control the stepper motors with steppers connected to JUST the attiny85 and not the USB AVR programmer. I understand that the USB programmer is helpful to get the program from the computer to the chip but once it’s on the chip I’d like to have a way of not relying on the USB. Would love to hear your thoughts on this
Yes. They work just fine connected to only the attiny. I had nothing but a tiny lipo connected to the chip and the stepper connected to the chip. I am sure it's not the proper way but it certainly works.
@@gearhed78 Hmmm ok. I've been having a heck of a time getting it to work. Is there a way I can email you a pic of the circuit I have setup on my breadboard? Also, what code are you using? Hope to be up and running soon. I've programmed the ATtiny using the Uno as an ISP and am running the ATtiny85 stepper library to make sure it all works. The code I used uploaded properly to the chip but I just can't get the stepper to move
@@vinceb121 Make sure to find coil A and coil B. Use a multimeter and touch the leads until you get continuity. When you find continuity between two of the motor leads, you have found either coil A or B. A or B is really irrelevant and any coil can be A or B just make sure it matches your sketch. The sketch I used is linked in the description I think.
Will be sending so you can see what I’m talking about! Really appreciate the help! If this helps at all or changes anything, I’m pretty sure it’s a bipolar stepper motor I’m using so there’s four wires coming off it: an A+, A-, B+, B- and it is very small...hang tight and I’ll send you a photo
@@gearhed78 Your email was listed but then it disappeared? I was going to send you the schematic that I had but now I cannot.
I am planning to put this thing in 3x3 Rubik's cube. Will it be able to move the side of the cube ?
I do not think it would have the torque. These were designed to adjust small focal lenses for cd/dvd players.Maybe with some gear reduction. I would at least test one for your project so know for sure.
Hi im doing this for a science fair project. Is it possible to control it with a force sensitive resistor?
I can't see any reason why you can't control it like that. These are not really that strong but for their size, they are pretty good. I would recommend looking at force sensitive resistor sketches closely and trying to find an example that you can adapt to your project.
Do you possibly know other small and strong stepper motors? and thank you!
What areas can be the possible applications of these micro motors???....please someone answer this
driving a camera focus lens, robot eyes, tiny rolling robot, tiny robot finger. moving potentiometer on a mixing table. moving a microscope table, making small model mecanism, maling a small opening mecanism for secret book diary, open and close small valves. register and automate a keyboard knob button set...
robot facial expressions, blinking, eyes imo but will need gear system or pulley system. these can easily fit in skull of humanoid
How strong is it???
hi brad, how many steps per revolution? and volts/amps?
+rodstartube They run at 3.3-5v not sure of the amperage or steps per revolution. I was not able to get a datasheet from the company I purchased them from.Guessing 20-30 steps per revolution. Guessing though.
If they are the same steppers I used, think they are.. they are 18 degrees per step, so they are 20 steps per revolution.
I have been scratching my head about this for a while. You do not show an H-Bridge in the video, but the code you linked uses one. The code also references pins 2,4,6,7 for the stepper. That does not make sense to me because pin 4 is the ground. Possible the code link is not correct?
+George Miller It may have been changed a little but I got it to work with very little change from the original code. I would have to load this again on the Attiny to check. But yes, It did work with that code with little or no edits. Hope that helps. If you have the same setup and you are having issues I may be able to help. Other than that, try it out. No hbridge was ever used.
I will try this then. Thank you!
+George Miller Get it working?
I could not.
I wrecked 3 tiny steppers trying to solder leads for breadboarding. After the third, I got frustrated and gave up for the moment. I have 17 more, but I think I need better solder tips before I try again.
hi im using the same stepper, im triyng the one revolution code and it goes around 3 spins and it stops moving. Do you have any idea why it could be?
+pascuala sylleros What does your code look like? Do you have a link to a sketch that you are using?
+pascuala sylleros Are you using example 2 in the sketches in the link that I provided? If that's the case, that sketch makes the assumption that you have a stepper with 48 steps per revolution. These tiny steppers probably only have 16 or so steps so that would make sense. The code sets a loop to increment the steps. Each step increments a counter and this counter is compared to the line of code below. If you change that to 16 instead of 48, it may complete one revolution then stop.Let me know if that does the trick.
const int stepsPerRevolution = 48;
+Brad Focht thanks for answering. It Works oddly, after one or two trials it just stops working. I think the batery supply its the reason but I dont know how to change it, or what to do about it. My stepper work with 3.3v or 5v and the battery supply has to be from 6v to 12v. Maybe im overheating the stepper. Also I been trying with an easy driver but it didnt work.
this are the links of what im doing:
-www.instructables.com/id/Stepper-Motor-Easy-Driver/?ALLSTEPS
-www.arduino.cc/en/Tutorial/StepperOneRevolution
pd: sorry for the bad english!
Hey, I checked out the easy driver and found a great tutorial for this exact setup. I see in the link that you provided that the arduino is only using 2 pins (8 and 9). This link that I have shows the Sparkfun Easy Driver and how to set it up using all four outputs from the Arduino into the Easy Driver. I recommend this tutorial since it is specific to your driver and bipolar stepper. Also, I think your power supply should be just fine.Let me know if this works.
learn.sparkfun.com/tutorials/easy-driver-hook-up-guide?_ga=1.42382305.557037760.1450388704
Also just noticed this very important note about the adjustment for the stepper amperage. I would recommend turning this all the way down to 150ma.
"The potentiometer on board is included to allow users the ability to select the max current provided to the motor. It ranges from 150mA to 750mA. This will require you to be aware what current range your motor can handle - check the motor’s data sheet for the current settings."
Torque test
i cant fund like this motor in egypt 😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭
Can you order from alibaba.com?
That is where I ordered them from. They came from China.
You can thank the Islamic Extremist for that one.........
These comments are only for the discussion of this topic.
That is soooo tiny does a stepper motor have to be programmed
Stepper motors themselves do not need programmed. However, they do need some logic on a chip to sequentially magnetize the poles. They are not like a normal brushed motor. You cannot apply a positive and a negative to drive them. Since they are able to change directions, they need a way to know how many turns to go and how fast. The chip that I have does exactly that. It sends the pulses of electricity into 2 sets of wires at very specific intervals. So, the chip needs to be programmed but not the actual motor. I left some information in the description about where to get everything and some resources about how this setup works.
@@gearhed78 Is it possible to still order the stepper motor from the company? Is it possible to program the chip so that the motor rotates in one direction and at a certain rate?
@@Y.O.L.O I think the link I put up is dead to order the stepper but I checked Alibaba.com and aliexpress and they are still available for VERY cheap. As far as a certain direction and speed. YES, you can do that. You just have to adjust the script. I left a link to the available steppers somewhere in the comments here for another person.
Bought 5 of these because the description said "Stepper Motors" no word of how fucking micro they are. What can you do with these?
+Addi Anything you want! These were originally used for a dvd focusing lens I think.A tiny articulating arm? A tiny cnc machine? Tiny automatic etch-a-sketch?Anything tiny?
Question is how powerful they are...
how do you know what coil is - , + ? from A and B ? i have this one www.ebay.com/itm/111625120317?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT and im trying to use the big easy driver from sparkfun and all i see in the board is A & B no + or - label pretty vague i try hitting you up on skype but i never catch you in time
+Sys.stem Hey, sorry you missed me. I just did a continuity test and discovered that the two pins closest to each other are a single coil. I detailed a pic here. imgur.com/kRxyQut
i actually ment in the sparkfun driver
What micro controller are you using?
arduino mega and or nano or uno any of really and a spark fun easy driver
wow
is it possible to do micro-stepping with this tiny step-motor? like 0.1 deg per step?