Control a Stepper Motor remotely using WiFi to tune a Magnetic Loop Antenna (Blynk/ESP8266/DRV8825)
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- čas přidán 1. 08. 2024
- In this video, I will show you how you can control a Stepper Motor remotely, using WiFi, from your phone, and with that feature, you will be able to tune a Magnetic Loop Antenna remotely.
Please help and support this channel with Patreon: / rehamradio
Visit the re:Ham Radio website: rehamradio.com/
**********************************************
NOTE!!! IMPORTANT!!! Please read carefully:
Since Blynk upgraded to v2 and removed v1 from the AppStore and the PlayStore, the software in this video is DEPRECATED!!!
I created a new project that replacing this one and it can be found in this video:
• New WiFi Stepper Motor...
The new GitHub repository that host the new app can be found here:
github.com/tamirrosenberg/WiF...
Thank you! See you in the new video!
**********************************************
The diagram and source code can be found here:
github.com/tamirrosenberg/WiF...
Important - Details about the DRV8825 and how to set the VRef before use:
www.pololu.com/product/2133
Software to download:
Blynk - blynk.io/
Arduino IDE - www.arduino.cc/en/software
Links to some of the stuff that you saw in the video. You don't need to buy all of these or buy it from Amazon, this is just to give you some idea about the components:
ESP8266 - www.amazon.com/KeeYees-Develo...
DRV8255 - www.amazon.com/gp/product/B07...
DRV8825 Extention board - www.amazon.com/gp/product/B07...
5V Regulator - www.amazon.com/gp/product/B07...
Stepper Motor -
www.amazon.com/dp/B07THK76QQ?...
Motor Bracket - www.amazon.com/gp/product/B07...
Flexible coupling 5mm - make sure that you choose the size that fits your motor and capacitor -
smile.amazon.com/dp/B07M5Q7HT...
Enjoy.
-- Music credit --
"The Process" by LAKEY INSPIRED: / the-process
Creative Commons - Attribution-ShareAlike 3.0 Unported - CC BY-SA 3.0 - Věda a technologie
Thank you for sharing a beautifully simple way control a stepper motor. This is going to be fun to get working and to allow me to do what you did and control a mag loop antenna.
Thanks, @Thuff. Yeah, it's really a nice project and I tried to provide all the details so it will be easy to implement. Good luck, 73!
Well done. I'm going to use this for my Mag Loop project. Thank you for sharing this information and doing a great job explaining each step.
Thanks, Ricardo, good luck.
Excellent video - educational, practical, assembly instructions and links to every part needed . . . fantastic video ... keep them coming, please.
Thank you so much for your reply! I appreciate it!
Excellent video. exactly what many ham will be looking for. Good Job
Yep! Designed for hams, by hams ;)
Thanks so much for your feedback, 73!
Good morning Tamir
I have found all the additional information I have been asking about. I am new to how youtube works and finally clicked on the SHOW MORE and there is all the rest of the information. Thank you and Happy Holidays.
Haha, great to hear that, Fred. Good luck, 73.
This video is exceptional. Thanks for laying out the process and details so clearly.
Thanks for your feedback, all the best.
Thank you for your excellent work.
Today, finally I could make the motor work after struggling with Blynk IoT. 73.
Great! Thanks for your feedback. Does that mean that you wrote a new code for the new Blynk?
Very nice work Tamir. Your info should be useful for one of my future projects. Thank you.
That's the idea Jack! Thanks for your feedback, 73!
Yes. I was just trying to figure this out. Won’t have to completely re invent the wheel. Thank You.
Glad to help, 73.
It works very nice. I can tune from 40m-20m. I want to say thank you for this video tutorial.
I'm so happy to hear that!! Great!! Hope to hear you on the bands. 73!
Magnificent ! Thanks for posting this !
You're welcome, 73.
Thank you! Exactly what I was looking for
Thanks. I want to mention that Blynk v1 isn't supported anymore but very soon I'll provide another solution. Please keep updated here. Good luck.
Thank you very much for a terrific article!! Hope to tackle this now that you have done all they leg work on research. very kind of you to offer it up for amateur review.
Thanks for your feedback, 73.
Hi, I just released a new video with a new software that will replace the Blynk app, Good luck!
Another great job! Thanks!
Thanks, Robert. I appreciate your feedback.
Great work and very well done.
Thanks, I just want to remind that this is the first version of this project and I already released the v2 version that is not based on Blynk. Please check it out.
@@reHamRadio Thats noted and I am in the process of purchasing parts.
Excellent video and Great Job, Thanks for sharing
Thanks @Carlos, I appreciate that. 73.
thank you for sharing your experience.😊
Of course. Btw, there are more newer videos about this project, please feel free to check them out. Good luck.
Fabulous video. Thank you!
Thanks, @David, but just a note, please review the description about the Blynk application that is not supported anymore. Instead, please check the updated video about the new software. Good luck.
Great video, I wish it was a simple downloadable app for my iPhone. Being an "oldie" that's the only part that confuses me !
Maybe in the future, I cannot promise that at this time. I appreciate your feedback, thank you!
WOW , OUTSTANDING
Thank you, Edward, 73.
Great Project. I"ve followed your instructions and added the library's and I get the folling error mesage.
Exit Status 1
Stray '@" in program.
Thanks Doug
Thanks, Doug. It looks to me as a typo? Can you please make sure that you copy-paste my code in full? Also, to help with debugging, I'll need to see the full error. Thanks.
What an amazing idea! I've just been thinking about modifying my 10 y.o. home made magloop with the cable-remote control, so now I know how could I do that! Thanks, subscribed! 73! Linas LY2H
Thank you, Linas. Good luck with the upgrade. 73!
Very informative.
Thank you Cristy, 73!
Fantastic! Many thanks and best 73 from EA2BCT / François
Thanks, Francois, I appreciate your feedback, 73!
Amazing!!!! Thank you!!
Thanks, Vadym. Good luck!
Many thanks for an excellent piece of work! Should have read the Comments first though - no Blynk! Desperate for your alternative solution. By the way - I have used a Trinimac TMC2209 as an alternative to the DRV8825, it's a much superior driver and with 1/64 microsteps you can get better resolution in tuning. Thanks again from a new subscriber. G4IEG
I'm going to release a new software version without the need of Blynk. Stay tuned to this channel. You'll have a solution.
@@reHamRadio I realise it takes a long time to create a video and edit it but maybe in the meantime you could upload the circuit of the new solution ro dropbox or somewhere and post a link? It would be great to finally get the controller working. Thanks.
Hi @Alan, I just released a new video with a new software that will replace the Blynk app, Good luck!
Thanks Tamir, great video, very interesting and extremely elegant solution to the problem of remote tuning a loop. Definitely going to give it a go. Thank you for sharing your ideas. Richard, G0NAD.
Thanks Richard, I'm going to release a new software version, please stay tuned.
I am looking forward to building this project this winter. Thank you for documenting your work so well. 73 DE KJ7RDV
Yeah, was my idea of the documentation, so it will help others. Great to hear that, John and good luck with the project. 73.
Just what I was looking for to tune my newly built mag loop antenna. THANKYOU. Daryl de VK3AWA
I'm SO happy to hear that! Good luck and please feel free to ask any question if needed, 73!
What a great tutorial. Very nicely performed.
WA6ATI
Thanks, I'm happy it was useful.
Very nice project, congratulation! I have only one issue: don't use Blynk, use web server with Acces Point from esp or your credentials (ssid and password of your wifi network from home) that you have to write in esp! Today, Blynk don't work anymore, the server is down. So, why you have to depend on foreign server if u can make your own..
Thanks for your feedback.
Blynk was the first version. I already developed an independent application that is much more rich than Blynk. Please check my channel for the other videos on the newer version. You can also find details in the description of this video.
Good luck, 73.
Thanks for this and for sharing your code. Have you thought about making some pre-set buttons for frequencies you like to use?
It's a great question, and yes, I had some ideas while designing this remote unit and pre-sets was one of them.
But, it's not the best to do with this specific design because in this case, the motor and capacitor can run more than 360, without any limits. It means that the capacitor can turn in one direction non-stop and I will never have a real reference where is the actual position, especially, when turning the unit off and back on.
To add this feature, I will need to add some "limit switch" so I may be able to count the steps in each operation, once I get a signal from that limit switch.
I found it easy and simple to just tune the unit when needed.
Todah again @Arnie :)
73,
Tamir
Thanks for the nice presentation on your magnetic loop antenna tuning design! (My first homebuilt magnetic loop antenna is an analogue version driven with a DC gear motor and a fine tuning based on a field strength meter. Are you using a uni polar or bi polar stepper? I already designed one with an Arduino UNO and cheap stepper 28BYJ-48 (uni polair). Good luck with this nice MLA project! Take care, Greetings Theo, 73 .
It's a bipolar. Thanks for your feedback. Yeah, I'm sure that even the analog version is interesting. All the best!
Thank you for sharing a beautifully simple way control a stepper motor. Just wanted to know if I can use TB 6600 Stepper Motor controller in place of DRV 8825 to controle NEMA 23 Stepper motor @4Amps
Thanks
Thanks for your feedback. I'm not familiar with the TB 6600, but I did a quick review on its specifications and it looks like it is possible. Looks like the TB 6600 works similar to the 8825 as the control based on three pins: Direction, Step(Pulse) and Enable pins.
As for the motor, it based on two pairs A+/A- and B+/B-.
I would just double check the voltage level that you are using and make sure that all is fit.
Bottom line, it looks like it can be use as well but needa a more deep review into the numbers.
Good luck!
The only thing to add is another Stepper Motor attached to the base of the entire assembly so that the operator can Fine Tune the Direction of the Antenna ( reminds me of the Germen WWII direction hunting antenna. This way you can get a better signal if you are not aimed in the right direction.
Thanks Steven, you are right, I also thought about that. It's actually not so complicated. Maybe in the future. 73.
Great presentation Tamir. I am in the process of building the mag loop and have all of the components, except the stepper motor, driver, and control board. BTW which stepper motor are you using? Is it the NEMA 17? I will hold off on ordering until I am sure which motor to use. 73 and thanks for a great video. Roy KC9JQN
Yes, any Nema 17 will work. On my website, I provided examples of the components. Thanks, 73.
Jim Ford ...N6JF
I built a mag loop for 40 M thru 10 but only 40 when I hook up an extra non variable vacuum capacitor. I want to motorize this but have just tried a regular .6 rpm motor which is still too fast even with reduced motor voltage. Actually much of the problem is motor backlash. I am worried that the motor step size particularly for 40 M might still be too large. Can the program be modified for smaller steps? I tried to teach myself Arduino a couple years ago but need to relearn because I did not follow up on what little I did know.
Hi Jim, yes, in the movie I mentioned how to set the speed slow as 1/32 of the original speed. Good luck.
Best video, just a question
1.why not used Arduino?
2.esp MC have wifi inbuilt in all MC?
3.blynk app will only work with that code?
Thanks, Victor.
1. I wanted to keep it simple and small. It's much easier and cheaper to use a small microcontroller near the antenna than a small computer like the Arduino. But, using the Arduino is not a mistake.
2. The latest microcontroller models have WiFi and some even Bluetooth. Built in.
3. The code mentioned in this video related to the Blynk v1. The problem is that Blynk released v2 and stopped the support for v1, so I created a new repository with a new solution, a new independent application. Please review the description of the video and you will find a link to the new project that is already in use by so many people worldwide.
Good luck!
Hi awesome video. Is there anyway to control manually with a knob in addition to the controller? I'm ordering these parts from your list.
Hi J, everything is possible :). It's just about building the other features. I do have some ideas and I hope to release them soon. Thanks for your feedback, 73.
GREAT presentation! Curious about adding other devices...a second stepper motor....a relay to switch in a fixed tuning cap....etc. Is that easily done in Blynk? Thank you so very much for publishing this article.
Thanks Lyn, everything is possible with a bit of design. Blynk version 1 is not supported anymore. I'm going to release a new software version soon. Please stay tuned. Good luck.
Hi @Lyn, I just released a new video with a new software that will replace the Blynk app, Good luck!
Question: I ordered the motor in the link, and it came with not two black and red leads, but a red, black, blue, and green leads. Do you know how these correspond to the diagram?
Thanks, Terry, N7TB
Hi, yeah, in the diagram, i choose only Red and Black just to show the pair of the motor coils. It's better that way as anyone with any kind of motor will be able to understand the correct connection.
But in this case, since it's the same motor, please take a look at this part, from Amazon. The picture shows the relationship between the colors, as this special cable built with the right color order. Please pay attention to the color orders in each side of the cable. Good luck.
www.amazon.com/gp/product/B07QHTG82K
Who makes the various jumpers between boards? What are they called or what do I shop for?
Hi @Peter, please take a look at my other video about the MagLoop, I have some pictures there that shows how I connected the jumpers between the boards. Hope it's help.
Hello,
Quick question, to install the program on the Arduino board from the computer through the USB cable, is it necessary to power the circuit with 5 volts?
Thank you in Advance!!!
Hi Carlos. No need, if you connect to USB to program the ESP, the 5V from the USB is the only power it needs. Later, when you want to ESP to work, you should provide that 5V power. Good Luck!
Thanks so much for all the work you put into developing this and sharing it with us. I've always wanted to know how arduino could be used in my station and had no ideas until now . Saw your post on Magnetic Loop antennas today and clicked on it. Love your work, 73's de ZL4MBW
Thank you so much for the feedback. Yeah, I'm sure that lots of hams have the same problem and I knew that there must be a way to use this technology to solve it. I can share that when I first started to think about the options to build it, I considered also the Raspberry Pi and some of the Arduino versions. But at the end, I decided to use the tiny micro-controller as I wanted something simple, with less components to maintain (i.e OS, etc). I have more ideas to add, but... Step by step ;)
Again, I really appreciate your feedback, 73!
@@reHamRadio I am building a mag loop now using a Russian variable cap. it does have a hard stop when turned (many turns) in either direction. I was thinking if a person could add a torque or amp spike feedback saying that the shaft is now at "resistance" to stop and set the program to "Zero" state. Or an optical feedback saying the shaft has stopped turning. What do you think?
I have another question regarding BLYNK. I was able to log into Blynk and create a UID and PW. I even got an welcome email from them but to date I have not seen this number/code that I am supposed to put into the code. I have tried to email them but all I seem to get is an automated computer channel that does not recognize questions. Was that welcome letter supposed to have that numbere in it?
Hi again, Fred.
I just checked the first email that I got from them and it should looks like:
"Auth Token : xxxxxx-xxxxxxxxxxxxxxx
Happy Blynking!"
I suggest the following:
First, try to search in your Inbox for mail that came from "dispatcher@blynk.cc"
If you cannot find it, you can simply create a new Project, that will send new a new Auth Token.
Please review the instructions here: learn.sparkfun.com/tutorials/blynk-board-arduino-development-guide/get-a-blynk-auth-token
Have you looked at the new version of Blynk and what changed would be needed to use it?
Hi Leon, yes, I got this question from lots of hams that asked for an update. I have an idea to release that and even another solution that is not based only on Blynk. I hope to release that soon. Thanks for your feedback, 73.
Hi,
Thanks a lot, its really greate effort and great knowledge.
i need to do a project for a preset position linear actuator with a DC motor abd a stepper motor, with Arduino Mega or UNO but i am not able to write the code and the scheme, can you please help.
Regards
Thanks for your feedback. Please try to search on the Arduino forums, you will find so many examples that one should fit your needs.
Good afternoon. I just came across your video and like what I see. Couple things. Is it possible to get the step rate to 64 or 128 with the hardware that you described using? Where do I find all the links you referenced in the beginning of your video? This is actually the first time that I have connected to a developer via youtube, so I don't know the in'sand outs of all this. I ambuilding a trombone capacitor and this might work quite well.
I found everything I needed. Thanks..
Fred
Hi Fred,
1. All the links that I mentioned can be found in the description of the video. It could be that in the description, you will find a "SHOW MORE", please just click on it and the links will show up.
2. More links to useful information can be found in the GitHub project here: github.com/tamirrosenberg/WiFi-Stepper-Motor-Controller
3. As for the max step rate, it looks to me that it's 32. Please take a look at the specification of the driver: www.pololu.com/product/2133
It says: "...six microstep resolutions (down to 1/32-step)..."
I hope that the information above will be helpful.
Dr om. I haven't worked with Blynk yet, I'm not familiar with it. Is it possible to use your application after login or do I have to create my own?
Hi @Lev Kohút,
You will need to create your own application as we are using the "free" version of Blynk. The free version is for a single device.
But, as you so on the video, it's so simple... you can build what I showed in few 2-3 minutes.
Good luck, 73!
Can I also use an ESP8266 D1 Mini lite or do I need more memory for this
Mainly yes, they are very similar to each other, but this is something that needs to be checked first. Also, since the mini has less GPIOs, the software probably needs some modifications.
Just completed the hardware, now put Blynk to work
Hi Pierre ... I just simply could not connect my Blinkx to the setup ... is it my wifi ? i am using 2.4GHZ ... had tested my hardware as webserver with other sample ... all connected perfectly ... but BLINKX just can not see my ESP
Possible correction: In the wiring diagram shown at 2:42, might the 100uF electrolytic cap be drawn incorrectly? it looks like the white stripe which usually marks the negative lead is connected to the red (+) wire. Should that diagram show the cap reversed?
Also, the first link for the Keeyees development board and ESP8266 comes up as unavailable. Could you kindly provide an alternate link for those components. I am not well versed in these components and I don't want to order the wrong parts.
How do you run the Blynk program on a PC as you mentioned in the video?
Many thanks for this great video and for sharing this project, and thanks for answering these questions.
Thanks, @Todd.
1. Yeah, you are right. The Icon of the capacitor showed in the movie showed the opposite and should be installed in real life the opposite. As always, connect the capacitor as it should be: (+) to Positive and (-) to Negative. - Thanks for the comment!
2. That link opened fine on my side, without any issues. Are you located in the US? Maybe it's different for other countries? It also showed as "In Stock".
3. The Blynk Application will run on your mobile phone. The software that showed in the movie is called "Arduino IDE" - we are using this software to write the code and upload it into the ESP. The link is in the description of the video.
@@reHamRadio Thanks for the very helpful answers - I understand all of it now. The Amazon link did open for me this morning but it said that the item was out of stock and it was unknown when it would be available. They must have just updated it this afternoon. OK, I am familiar with Arduino IDE and I understand that is what you put on the PC and then upload the sketch into the ESP, and then control it from the mobile phone. Thanks again for all of your help!
I run win 11 I could not run the code without an extra two lines from Blynk website it's probably their updated verification or auth code system. I also needed some drivers for the esp8266. You can get those from silicon labs.
Interesting. I used Win 10. Good to know. Thanks for sharing with the community, 73.
Can I add this wifi remote control tuning to a 2e0ero 8 band magnetic loop that already has a 12V motor-driven tuning box? ... 73
I'm not familiar with the motor option of that antenna. I tried to check for some information online but I saw a few variations of that motor.
The controller is designed to control a stepper motor. I think that they are providing a DC gear motor.
I would love to be able to control the motor via a web page - use case would be using the stepper motor to remotely control a small MLA30 loop antenna that is mounted outside the window. And rotation via a website would be able to allow me to turn it from other locations while connected to SDR (remote listening) is this possible? or is it just via a phone app?
@Adam, yes it's possible and even super easy.
For that, you will just need to access your home router, find the place that you can set "Port Forwarding" and enable the option to forward traffic directly to the controller IP.
As for the other question, the application is a web application, not a mobile app, by design. You can access it from any browser without installing anything.
Please check this channel over this weekend, as I will release a new video that demonstrates the latest features. It will answer lots of questions.
Thanks, 73.
@@reHamRadio I cant wait! Thats great! Thank you so much! Parts are on order as we speak ;)
One more thing @Adam, this specific video that you commented on is a bit old and show the use of the old Blynk app that is not supported anymore (by Blynk, not me ;) ) Please check the latest videos with the latest updates czcams.com/video/9yk-2Kybxgk/video.html
Good luck, 73!
Id like to be able to use this as a mini rotator for an MLA-30 receiving antenna and try to weatherproof the motor (as best i can) also use a web page to control it (so i can do it from a remote location) is this possible? or is the app the only way to use this? (awessome video by the way!) Adam N1AH
Thanks, @Adam.
Of course, you can use the controller and the application just for the antenna rotation. You have the option to control the directions and speed. I. Addition, the next version is under development and when it will be released, you will have the option to use Memories for an easy option to move to a known, preset position.
Also, please check this channel during the coming weekend, I'm going to release a video that explains and demonstrates the latest features.
Stay tuned! 73!
Hi again I don't really know what I'm actually doing I got 2 problems at the moment 1 is I cannot find the Blynk authentication code I rang blink at home ma up to ask them that they didn't seem to know anything about it I wonder whether you can help with this I am also getting have refused pop-up mainly is the one is can't remember the full saying it's out of scope Wi-Fi out the scope or something like that I haven't got a clue what I'm doing if these queries questions get too many please let me know in your response and obviously I'll stop asking because I am a total newbie and I don't like to be a pest thank you for your time
No problem Cyril.
1. I'm not sure where are you in the process, but to get the Authentication code, you need to register (It's free) on the Blynk website. If you already did that, you should get an email from them that will include a line like: "Auth Token :xxxx....".
If you don't find that email, maybe try to check you Spam folder? Just search you mailbox for "blynk".
2. I don't understand the issue here. I can guide about the "WiFi", that you need to update the code with your WiFi network name and the WiFi password. Also, please make sure that you are using a 2.4Ghz access point as the ESP is not supported for 5Ghz.
I hope it helps, good luck.
I have wired up the hardware ... had tested my ESP2866 module ..and have spare ... it's has been unfortunate that I am not able to connect to Blynk ... I know my hardwares 100% working , i also using 2.4GHZ wifi ... The only item left that I have no proper way to verify is my home router/fire-wall ... appreciate guidance ... thanks
The basic thing to check is if the ESP is actually connected to the router. Try to log into the router, and under DHCP, you should locate the IP of the ESP. please try to open a browser with that IP and check if you have access.
Please show us your new solution for the sofware as the Blynk Legacy app cannot be registered now and I cannot get the new verison of Blynk to work with your project. Thank you.
A new video with the solution will be released soon.
Hello Tamir,
All seems OK with Arduino IDE, but I can't connect with the internet.
The upload to the bord likes OK
My question is which board did you collect in Arduino IDE en in the Blynk appclication.
Best regards, Gerrit, PA3FAS
Hi Gerrit, thanks for your feedback and question.
I hope that I understand the question but I think that you just need to download the ESP8266 and Blynk libraries to the IDE. Please review the Readme text that I added to the GitHub repository (where the code located). I added explanation on how to download a library to the IDE.
You also mentioned that you can't connect... Could it be that you didn't add the Blynk code and/or WiFi details in the code?
If you still have an issue, please let me know, I would love to help. Good luck!
@@reHamRadio Sorry for no more information. I mean Which ESP card have I use in IDE and also In Blynk app. I chose in IDE NodeMCU 1.0 and in Blynk app NodeMCU. The upload is no problem. But I can't connect the internet.
Gerrit
Hi Gerrit,
In the IDE, please go to "File" --> "Preferences", please make sure that in the "Additional Boards Manager URLs" you have the following link:
arduino.esp8266.com/stable/package_esp8266com_index.json
Then, from the "Tools" menu, I choose:
"NodeMCU 1.0 (ESP-12E Module)"
As for the Blynk App, I choose:
Hardware Model: "ESP8266"
Connection Type: "Wi-Fi".
Please let me know how that goes.
Good luck,
Tamir
N6JJ
hi there I'm working on this project I've got all the parts and got it all wired up. I've now gone back to do the software side but I'm am struggling in finding the libraries in the Arduino IDE software would you please be able to simplify for me as i am new too useing Arduino and knowing what board to pick in the IDE software for the files doesn't seem to be recognisedsinghe
Hi Cyril, sorry from my long delay with my reply.
In your Aruduino IDE, from the main menu choose "Tools".
Then choose Board: "NodeMCU 1.0 (ESP-12E Module).
I hope it will help. Thanks, 73.
In addition, thanks to your comment, Cyril, I updated the README file with these details as well. Thank you!
github.com/tamirrosenberg/WiFi-Stepper-Motor-Controller/blob/main/README.md
Thank you very much for your time
There is pins on ESP 8266 to maybe get. Feed back ie positioning display
Indeed, there are more pins to get digital input and even analog but the challenge is how to get the motor position
Hello
Thank you for your video. I have a somewhat silly question. Can the magnetic field of the antenna disrupt the operation of electronic components?
Thank you again for your sharing
73 Jean-Pierre F61514
Hello @F61514 Jean-Pierre ! Thanks for your feedback !
I will start by saying that this is absolutely not a silly question but a super important one :) !!
Yes! If the electronics parts will be close to the Antenna Loop, they can be affected and disturb their operation and even can cause to an un-controlled operation of the "tuner" system. In addition, If the parts will be close to the Capacitor, they may even affected by some electric that developed on the Capacitor itself, as that capacitor, under 100W of transmission, can develop few KV !! super danger (never touch that capacitor!)
Because of these reasons, I built the "tuning" unit in a separate box, and mount that at the bottom of the mast of the Antenna. The only lines that are going close to that Capacitor are the stepper motor control lines (4 colors).
More than that, if you look closer in the video, you will see that I isolated the Capacitor from the stepper motor with a special wood shaft, as if not, the motor would get the few KV from it.
Very soon, I will release the 2nd video with my antenna, and I will mentioned all these concerns when building this kind of antenna.
So please stay tuned for the next video.
Great question! Thank you!
Tamir
N6JJ
@@reHamRadio
Thanks for an excellent video Tamir. I'll be interested to see how you shield the wi-fi receiver from the magnetic field of the loop without also blocking the wi-fi signal.
Hi @Norman, I just release a new video that show how I built the Mag Loop itself. You can see how I installed the ESP in a separate box, far from the Capacitor and mounted that on one of the Tripod's legs. It's working great without any issue. I hope it helps. 73, Tamir.
plan on making any videos on the better version of blynk? just realized everyone still uses this outdated version and I can't get the old version of the codes to flash to my nodemcu
Thanks for your question. The code that I provided is based on the latest Blynk library, that was downloaded using the Arduino IDE, so I'm not sure what is that "better" version that you mentioned.
The app you were using looks different than the one I use. One says blynk iot and the other says blynk legacy
Thanks for the clarification. I'm using the Blynk Legacy for Android. Not the IoT version. I didn't plan to release a version for that but I can look into it. What I have is a plan to provide a code that will run a webserver on the ESP and we could control it from any browser instead of the App.
Hello,greeting from North Macedonia what king of stepper motor you are using ?
Hi, the stepper motor that you see on the video is the Nema 17 (17HS4401). You can see full details on the project and the components on my website. Thanks.
I’m a little confused ,what is the red board that the 8825 sits on?
Never mind I figured it out
Hi Bruce, the red board is the extension board of the motor driver. Please review the description of the video as I provided the parts list with links. 73.
Hi Tamir, firstly a great video and a great project. I have all components and ready to build. One query. SLP as RST pins in the diagram are shown pulled HIGH. Please confirm that they indeed need a 5v supply. My DRV expansion board does not have pinouts for SLP and RST so may need to solder the 5V supply wires. 73 de ZL1REY
Thanks @Rey!
Yes, I can confirm that the RST and the SLP on the DRV8825 indeed should be HIGH all the time. Please make sure to provide them 5V. I think that I'm familiar with the expansion board that you mentioned. In my case, both pins were connected together, but there was no external pin to provide that 5V. I soldered a special wire to these pins underneath the board. I've been there :) Good Luck!!
@@reHamRadio Many thanks Tamir. Good weekend 73 from New Zealand
Hi again Tamir. Have successfully completed the project. Now to build the Magloop and move on...Many thanks for your advice...73
Great news :) I'm so happy! Thanks for sharing and good luck with the next steps!!! 73!
@@reHamRadio Hi Tamir Will you be writing a sketch for the ESP32 and BLYNK IOT?
Great presentation. However, I confess to being surprised by a bad connection between the rotor shaft and electrical connection of one good looking but old variable capacitor - only about 0.25 ohm by my milliohm meter but with a radiation resistance in the 0.3 ohm range you could, potentially, lose half your power in the capacitor shaft connection and never know it! Does anyone else have a comparable finding or am I the unlucky one?
Neil, AB4YK
@Neil, do you have any isolation between the capacitor and the motor? I didn't understand if you are using any. Please review the CZcams videos, all of them show a wood rod in between.
source code would be nice ! great effort though thanks
A link to the source code can be found in the description of the video. Thanks.
Dónde consigo uno?
Please my website, it's in the description of the video, thanks
Seems we are working on the same idea
Haha!! :) Please let me know if you need any help from my side, good luck, 73!
@OM0ET - I just remember that I visited you channel a long ago, was interested in the Mag loops, but I was focus about Non-QRP types. Yeah, we can share some knowledge if needed. I just subscribed to your channel! Hopefully you will as well :) Thanks a lot!
@@reHamRadio Oh thanks for watching my channel too! 😃👍Just subscribed! 73, Paul
Thank you very much for this video. I think it is based on Blynk version 1. But now Version 1 has been discountinued and Blynk IOT is in force, which is different from Version 1.
Can you upload a video how the Blynk v 2 is instaled in mobile for controlling the stepper motor.
thank you
73 Ameer Khan VU3SQM
Yes Ameer, I'm aware about that limitation and already have a better idea that will solve this issue for lots of hams. I got so many requests and questions about it from all over the world.
Very soon I'll release a new video with the new idea.
73!
@Ameer, I just released a new video with a new solution that will replace the Blynk. Good luck!
Super. 73 dc1bc
Thanks!
Just as a note, there is an updated version with a new video.
better to show how to create the blynk app complete, the way you show is does not work that way
Thanks for your feedback, Theo. I provided an example on how to create a single button, and obviously there is not need to explain all the buttons. I wonder what do you think is missing that could be a better guidance? Thanks in advance, 73.
Very informative video, many thanks. G0RJM.
Thanks, John, 73.