This video deserves an Oscar for effort put in its creating ! All those circuits designed as to look as a schematic diagram, the graphics moving and changing color, all the details explained, the oscilloscope graphics... Everything is so good arranged and easy to understand, put in such an order. I`m not surprised it`s done by a German. And he is very good in English speaking as well for a German. Great respect to the person spent probably close to a week to develop all the prototypes, cut open the housings of the servos so they could be observed and then filmed this video (or I better say movie according to its length) ! And on top of all that it has detailed Table of content in the description... Unbelievable attention to the detail ! Thank you, HomoFaciens, and great luck in your business ! I hope more viewers will appreciate what you`ve done!
Д. Станоев Thanks! Its people like you I am doing all this work for. In total it was more than one week. It took almost a day to record the audio track because I usually need more than one try for a section in the English version or else it would sound even more like German English ;) Share the link to this video and perhaps that of my homepage, too: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
+Д. Станоев I totally agreed. So much love into what he does and expressed to perfection. This guy is amazing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! We ned more of these people and less of the M.F $$$ scumbags.
This is FANTASTIC. I really appreciate the time and effort that you have put into your video. People like you bring world-changing possibilities to all people around the world, and elevate the Internet to its true potential. I would give you an award if I could. Thanks.
11:00 This is excellent. The error detector, is the two Op-Amps, with "Window" comparator required. The H circuit is either full on, or full off, as required. A very clear presentation! Thanks!
Thank you very much. It already has made such a difference in my life. I have uploaded a couple of short videos showing a servo based on your teachings in action. Please feel free to watch them, under my username.
ocayaro I am creating life changing videos? Great! ;) This one looks interesting to me: LM324 servo motor driver with sensor feedback You should give some more information about your creations to make other youTubers understand what you have done. UA-cam is more than just presenting own stuff it's spreading knowledge. Maybe an audio track with your comments makes your videos more interesting. What kind of motor are you using? It is running very smooth.
Thanks for the valuable tutorial, advice, and also for watching. Yes, I will make a video with audio and better definition and video. These ones were really to document my own progress. The motor I am using is from a 5V dc motor geared down to about 20rev/min.
+Costan Catalin-Rares You're welcome! I am currently working on a video about controlling DC motors with an optical encoder disc. I will show how to build a fully digital servo at the end of the video - stay tuned!
This is the best explanation video I've seen on youtube. Congratulations! You did a very outstanding job here. I just subscribed and look forward to more of your great videos.
The best explanation video I have I have ever seen, I can only imagine how much time it took you to put it all together ... Easy to understand, contains all the necessary information and creative at the same time. Thank you very much and looking forward to your next videos!!! P.S. I'm a subscriber now
Thanks! Yes, the videos I am creating are very time consuming as I am trying to visualise as many "non observable stuff" as possible by using animations. Currently I am coding 2D and 3D animations explaining electrostatic fields. It will be very academically, but since I like inspiring people, more practical videos will follow. Thanks for subscribing and: Good guitar music!
Thanks to Arnold Schwarzenegger, I now understand what a servo does. Didn't even need the captions cause I've been listening to you all my life. Loved you in Expendables 3 by the way. All joking aside you helped out a lot in a project I'm working on. Thank you.
the most detailed explanation of the servo motor very very great, but the other explanations determines an angle of 180 ° while it is half (90 °) in yours !!!
really wonderful these videos! I am learning many things, I will cover them several times to understand them thoroughly (reading the subtitles part of the attention goes to understand the translation) I realize that much of what I see and hear is forgotten after a short time .... then: repetita juvant Thanks Norbert!
Valentin Vieriu You're welcome! Tell your teachers about this video. It is freely available, so they can use the whole video or just parts of it for their lessons which could help to improve the quality of education. Besides that, sharing this video helps my project to become more prominent and so to improve the quality of my videos, too.
Oh beautiful. very good explanation. May you live a long life Full of gladness and health . May all God's blessings descend upon you. May peace be within you.
While waiting for your wiper motor you could watch my video about the Arduino Uno: Arduino Uno: control circuits and homebuilt servos The digital version of the wiper servo using that microcontroller is a great improvement.
F#=*ing amazing! kilometers better than any lecturer i have ever seen in my university :) greatest respect. and thank you! so much data so well presented. i am speechless. and i do not leave comments usually..
@Wang Kerr: Control circuits (and so PID) will be treated in a subsequent video. I am currently working on a video about microcontrollers and how to use these tiny computers to build digital servos. Software implementation of PID will at least be a small chapter of this upcomming video - stay tuned.
The video about the Arduino Uno microcontroller using software implementation of PID is now available: Arduino Uno: control circuits and homebuilt servos
+pebre79 Some more explanations can be found on my project page. My latest video is about encoder discs, showing how to build a digital servo: www.homofaciens.de/technics-base-circuits-encoder-disc_en_navion.htm
At 11:00 the circuit has 4 N channel FETS, won't that just short the supply whenever there is a positive voltage at X1 or X2? The upper ones should be P channel, no?
Thanks! Some more info on how to create own servos is available in my video about the Arduino Uno microcontroller: Arduino Uno: control circuits and homebuilt servos
Its welding wire I got from a hardware store here in Germany. Solder points tend to crack. I guess copper wire would be a better solution, but sometimes I simply take what I have ;-)
Thank you for the answer. I have built a big paddleboat model whith a 12V 80W motor.A PWM unit controls the speed whith a potentiometer. The servo turns 90degrees but the potentiometer turns 270 so I cant fix them together so I have done some kind of mecanikel gear.Would have been better al electronic but I think it have to stay this way
Thanks! ...I'm trying to get smarter with each video I am recording. In the time before this one I never had soldered a window comparator circuit... I'm still learning.
When I am using an integrated H-bridge such as an l298n, then can I directly connect the tiny servo's motor outputs to the input pins of the H-bridge without using comparators?
Maybe a look at my page about servos helps even more to understand. There you can see the circuit layouts: homofaciens.de/technics-base-circuits-servos_en.htm
Amazing great video. Thanks for making it, I enjoyed and learned much good things. Do you project kit ready to assemble for practice???? Let me know. Thanks again.
Thanks! I won't provide kits of the servo electronics. The circuit layout is anything else but perfect, thus only for educational purpose. If you'd like to build one by yourself, have a look at the project page to get the wiring schemes: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
hello.I have a couple of questions if you don't mind :D that is an integrated circuit or a microcontroller?I need a servo for an RC car for turning left or right and I have no ideea how to connect the servo to the receiver (4 channels).The transmitter haves obviously 4 signal outputs with basically push-to-ON switches.Can I use on one channel insted of a switch a pottentiometer like the one you used on the video and directly connect the signal orange cable of the servo to one afferent channel output of the receiver?I need this for my bachelor degree.if you have any indication that would be greeat and I would be very thankfull.
Liv Manole I have not idea what you are talking about. Have a look at the project page: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm: I have no microcontroller used in this video as you can see in the schematics. Maybe that helps to solve your problem..
i order a bunch of L293D ic chip, 10k Pots (& digital pot "mcp41010" just incase i can shirkify the setup). Will all this be enough to put together a home made servo ? i also have some dc motors as well as 3D printed gearbox. just in-case i got some 555timers and Op-Amp.
+Frank Lopez The schematics are available at: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm The maximum current of the DC motors must stay below 600mA when using L293D H bridges. Consider that the quality of the circuits in this video is clearly lower than that of commercially available servos. It's for demonstrating how thing work.
Half the arrows of your FET's at the 11 minute mark are pointing in the wrong direction (Half should be n-channel and half p-channel). However at the 15 and 28.50 minute mark you can see the correct schematic with the correct FET's. Either way it is a good explanation and awesome video. T.U.
Hi thank you a lot for the great simple explanation We are building a 20 by 20 cm robot using two 14 kg.cm servos The problem is that the servos cant keep a steady low speed , the servo internal control board seems like it is reseting repeatedly and randomly. Strangely if we give the servo an initial signal from the arduino then we disconnect the arduino, the unstable speed behavior stops Plz help us we have a competition coming and we need your help
You are talking about a servo for continuous rotation? Modern servos have a built in microcontoller which could cause your trouble. Maybe it does some recalibration when reconnected. Something that also can cause trouble is temperature. If the H bridges heat up during operation the electronics might drift and so chage motor speed over time. So the only tip I can give is trying another type of servo.
Dear Sir, I learned a lot from your video. Thanks for your enormous effort. I have one question. Can H-Bridge be build using combination of NPN and PNP transistors instead of IRF9Z34N and IRLZ24N?
You're welcome! Yes, you can also compose an H-Brige of NPN and PNP transistors as demonstrated in my video about that circuits: Working priciple of H bridges and written on my project page: www.homofaciens.de/technics-base-circuits-h-bridge_en_navion.htm Bipolar transistors are more tricky to handle, since the base current has to be considered, which is very high for high power types. This type of H-Brige can't be driven directly by a low power op-amp as used in the video. You have to insert an additional amplifying stage between the op-amp and the power H-bridge.
Dear Sir, Thanks for your feedback. Can you please also suggest that how can I have a soft start and soft stop speed of the motor in the beginning and at the end position respectively of the servo motor? Higher capacitor in H-Bridge may some how help? I guess not to a big extent or?
Inserting a capacitor in the H bridge won't succeed. I will soon (probably in some weeks) publish a video about microcontrollers, demonstrating how to build digital servos. I guess something like that would be the best solution to your problem. ...sorry for my late response, but I did not notice your question until now...
HomoFaciens Dear Sir, Thanks for your reply. I am waiting for your video about microcontrollers. Thanking for sharing your knowledge, a great effort from your side.
Hello, i it possible to modify servo in a such way, so that value from the potentiometer is read by the arduino as well? So that micro controller can detect situations where servo is commanded to assume position but it did not (perhaps some mechanical obstruction)
+Davorin Ruševljan Yes, you can read the servo position through the wiper and an analog input of the Arduino, assuming you know how to do the coding. Don't forget to limit the input voltage of the analog input (in case your servo operates with more than 5V).
Chris De Berg The really simple way is buying a RC motor controller ;) Using an Arduino is simple if you are skilled in using microcontrollers. Analog circuits are tricky to implement. You can try to convert the PWM signal into a DC voltage as demonstrated in the video and reconvert that DC signal into a PWM signal through an astable multivibrator if you'd like to learn how it works. It will be a long way to build a good quality circuit that way...
Muchisimas gracias el mejor video en su tipo ,Y el mejor INGLES que he escuchado!! No necesite leer entendi todo clarito: Pregunta para ti Tengo instalados en mi aeroplano 4 servos Futaba S3305 para trabajar en 6volt , pero se ponen a conversar entre ellos que parece una camada de ratones ! y los movimientos son lentos y pobres me comio la bateria de 6V en un ratito Le puse 12V y andan PRECIOSO no conversan mas y trabajan sin problemas ; es Peligroso que se quemen? NO calientan ,
Ok My Friend No problem:Thank you so much the best video of its kind, and the best I've heard ENGLISH !! No need to read everything I understood ALL: Question for you I have installed on my airplane 4 servo Futaba S3305 to work in 6volt, but get to talk to each other seems a litter of mice! and movements are slow and poor ate me 6V battery in a while I put 12V and walk PRECIOUS not talk and work more smoothly; Is Hazardous to be burned? NO heat,
juan asanelli ...I still don't understand your problem. You are using 6V Servos with 12V?!? I have done this accidentally with a servo while recording this video and scrapped the device...
nice. I was searching for diy servo videos. I think I can make one now. It would be very kind if you provide the name of the components used here. Love from bangladesh🖤
Why not having a look at my pages, as I told you in the video? homofaciens.de/technics-base-circuits-servos_en.htm But keep in mind the circuits are just for understanding how things work, not for making a useful servo. I have made a big servo based on a Raspberry Pico and the video will go live, soon. Stay tuned!
This video deserves an Oscar for effort put in its creating ! All those circuits designed as to look as a schematic diagram, the graphics moving and changing color, all the details explained, the oscilloscope graphics... Everything is so good arranged and easy to understand, put in such an order. I`m not surprised it`s done by a German. And he is very good in English speaking as well for a German. Great respect to the person spent probably close to a week to develop all the prototypes, cut open the housings of the servos so they could be observed and then filmed this video (or I better say movie according to its length) ! And on top of all that it has detailed Table of content in the description... Unbelievable attention to the detail !
Thank you, HomoFaciens, and great luck in your business !
I hope more viewers will appreciate what you`ve done!
Д. Станоев Thanks! Its people like you I am doing all this work for. In total it was more than one week. It took almost a day to record the audio track because I usually need more than one try for a section in the English version or else it would sound even more like German English ;) Share the link to this video and perhaps that of my homepage, too: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
+Д. Станоев I totally agreed. So much love into what he does and expressed to perfection. This guy is amazing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! We ned more of these people and less of the M.F $$$ scumbags.
Thanks! Share the video so that it might get a UA-cam award some day...
@@HomoFaciens Yes, I agree with everyone else, this is a fantastic video. I's so good, I downloaded it just to make sure I never lose it! :)
This is FANTASTIC. I really appreciate the time and effort that you have put into your video.
People like you bring world-changing possibilities to all people around the world, and elevate the Internet to its true potential. I would give you an award if I could.
Thanks.
In explaining the concept of mechanical, "Control Systems", this is one of the best!
10:30
The real heart of a servo feedback system.
Thank you!
This is by far thee most EXCELLENT video on Servos that I've seen on the entire internet. Thank you HomoFaciens!
This analysis was of great value to me, to explain DC servos!
Thank you!
You're welcome! Always good to know that the efforts put in my videos are for more than nothing.
best servo video ever made.
thank you.
11:00
This is excellent.
The error detector, is the two Op-Amps, with "Window" comparator required.
The H circuit is either full on, or full off, as required.
A very clear presentation!
Thanks!
The best video on the internet regarding servos. Should be used in engineering courses. Even the measurement of torque is unique.
I just had to download the entire video.
ocayaro
You are allowed to download, modify and use it for courses or what ever you like - it's creative commons!
Thank you very much. It already has made such a difference in my life. I have uploaded a couple of short videos showing a servo based on your teachings in action. Please feel free to watch them, under my username.
ocayaro I am creating life changing videos? Great! ;)
This one looks interesting to me:
LM324 servo motor driver with sensor feedback
You should give some more information about your creations to make other youTubers understand what you have done. UA-cam is more than just presenting own stuff it's spreading knowledge. Maybe an audio track with your comments makes your videos more interesting. What kind of motor are you using? It is running very smooth.
Thanks for the valuable tutorial, advice, and also for watching. Yes, I will make a video with audio and better definition and video. These ones were really to document my own progress. The motor I am using is from a 5V dc motor geared down to about 20rev/min.
I've search all over the internet and this is by far the best presentation of servos I've seen. Thank you very much for this well structured video!
+Costan Catalin-Rares You're welcome! I am currently working on a video about controlling DC motors with an optical encoder disc. I will show how to build a fully digital servo at the end of the video - stay tuned!
This is the best explanation video I've seen on youtube. Congratulations! You did a very outstanding job here. I just subscribed and look forward to more of your great videos.
Your videos are the best on the web!!! Keep up good work! Thanks!
The best explanation video I have I have ever seen, I can only imagine how much time it took you to put it all together ... Easy to understand, contains all the necessary information and creative at the same time. Thank you very much and looking forward to your next videos!!!
P.S. I'm a subscriber now
Thanks!
Yes, the videos I am creating are very time consuming as I am trying to visualise as many "non observable stuff" as possible by using animations. Currently I am coding 2D and 3D animations explaining electrostatic fields. It will be very academically, but since I like inspiring people, more practical videos will follow.
Thanks for subscribing and: Good guitar music!
Thanks to Arnold Schwarzenegger, I now understand what a servo does. Didn't even need the captions cause I've been listening to you all my life. Loved you in Expendables 3 by the way. All joking aside you helped out a lot in a project I'm working on. Thank you.
Murat Onder Youre welcome!"I'll be back!" The video I am currently working on will be online this weekend.
what an ingenius way of showing the wiring and passage of power and signals....impressed ;)
Brat4PrimeMinister Thanks!
Amazing breakdown of how the entire servo loop functions. Thanks!
Excellent video, contains everything from basic principles to technical details of implementation.
congratulations, is the best, most informative and most educational video I've ever seen
Thanks! More will follow soon. I will create a video about microcontrollers explaining how to create digital servos.
HomoFaciens Microcontrollers Arduino?
Mohammad Baber
Yes!
Very well done - it's a shame it doesn't have more views for all this great work!
Thanks! I did all this work for people like you - not for the total views (nevertheless that number is increasing day by day).
Thank you this is the best video I ve seen.
This is a well made tutorial! I can see you spent quite a long time to produce such quality.
Yes, my videos are definitely not recorded and cut on an afternoon. It's worth all efforts for people that obviously recognize that.
Fabulous, Fabulous, Fabulous video, super thorough, with great info. You sir, are what youtube is all about. Thank you!
+divyajnana Thanks!
the most detailed explanation of the servo motor very very great, but the other explanations determines an angle of 180 ° while it is half (90 °) in yours !!!
a very thorough introduction to servos, thanks
Very impressive demonstration, thank you very much for the great vid, much appreciated!
A very good video, explaining in depth concept. Explanation with oscilloscope done all the job. A very excellent work keep it up.
really wonderful these videos!
I am learning many things, I will cover them several times to understand them thoroughly (reading the subtitles part of the attention goes to understand the translation)
I realize that much of what I see and hear is forgotten after a short time .... then: repetita juvant
Thanks Norbert!
Thank you for this great tutorial! Very well explained! I wish my teachers were half as skilled as you are.
Valentin Vieriu You're welcome! Tell your teachers about this video. It is freely available, so they can use the whole video or just parts of it for their lessons which could help to improve the quality of education. Besides that, sharing this video helps my project to become more prominent and so to improve the quality of my videos, too.
This is what the Internet was made for! You got my sub long before the video finished.
Thanks!
At least I am trying to use many features of the Internet to explain science and technology...
you are a genius!!
i admired all the hardwork you have done and you explain so clear ...thanks thanks...thumb up!!!
Oh beautiful. very good explanation. May you live a long life Full of gladness and health . May all God's blessings descend upon you. May peace be within you.
+محمد مبارك حسين Muhammad Mubarak Hossain
That's all I need - thanks!
Very simple, understandable breakdown. Thank you!
Great video! Very detailed and comprehensive . Thanks
This is just what i needed, getting my wiper motor tomorrow
While waiting for your wiper motor you could watch my video about the Arduino Uno:
Arduino Uno: control circuits and homebuilt servos
The digital version of the wiper servo using that microcontroller is a great improvement.
Fantastic video, thanks for the obvious effort that you've put in. Truly excellent
Great teaching, this guys rocks!
+nikotwenty Thanks!
Cool, i didn't know Arnold Schwarzenegger knew this much about servos.
Fredrik Johansson Servos are essential parts of robots and cyborgs and so of terminators...
:D
HomoFaciens XD, nice answer
+Fredrik Johansson I was going to say the same thing
Robin Campfens hahaha
Congratulations. It's very nice a simple, it's exactly what I search. Thx you. God bless you.
Thanks for putting so much effort into your videos.
JohnnyRottenest ...it's indeed a huge amount of effort and time. Thanks for bringing this up.
F#=*ing amazing! kilometers better than any lecturer i have ever seen in my university :) greatest respect. and thank you! so much data so well presented. i am speechless. and i do not leave comments usually..
You put so much efforts I appreciate that.
Excelente explicación. Gracias.
Its a DSO-2090 USB and I am using openhantek and Linux (in the video it is Mint) to display the curves.
Thanks a lot. I can't forget your contribution in my life.
Great video. THANK YOU!
Your video is inspired me in my new project using servo motor! Thanks a lot for share! :D
Thanks!
You don't have to award me - simply share the video with other people being interested in electronics, too.
thanks a lot Mr Faciens , i really appropriate this effort you put to make this video
a00000z100 You're welcome and yes, lots of effort and time was needed to create the video...
@Wang Kerr: Control circuits (and so PID) will be treated in a subsequent video. I am currently working on a video about microcontrollers and how to use these tiny computers to build digital servos. Software implementation of PID will at least be a small chapter of this upcomming video - stay tuned.
The video about the Arduino Uno microcontroller using software implementation of PID is now available:
Arduino Uno: control circuits and homebuilt servos
HomoFaciens a
Sehr geniales Video, besser als TV!!
Danke!
Das Filmchen gibt's auch auf Deutsch:
Servos - Funktionsweise und Eigenbauten
This is better than stuff at my university !!
+General Kenobi ...but they could use this video to improve education - it's creative commons.
I will be sure to mention your channel :)
+General Kenobi
Thanks!
Really interesting! Great video
+Robin Campfens Thanks!
This was super useful. Thank you!
Just brilliant...thank you for the insight into the controller board... I like the bit that worked...LOL it all works :)
...and the digital version works even better:
Arduino Uno: control circuits and homebuilt servos
Very thorough and excellent explanation. I have subscribed!
+pebre79 Some more explanations can be found on my project page. My latest video is about encoder discs, showing how to build a digital servo:
www.homofaciens.de/technics-base-circuits-encoder-disc_en_navion.htm
Put 00:00 instead of 00:05 as the first timestamp in the description, UA-cam will then automatically create chapters with all the timestamps provided.
Thanks, I have changed that.
Wow! Fantastic video!!! Thank you very much!
Jorge Merlevede You're welcome! So you might be interested in the sequel of this video: Arduino Uno: control circuits and homebuilt servos
Thanks for video.
This so good, better than my university😖
+Sunmola Ayokunle ...so tell you university about my creative commons videos.
Awesome Work...
very nice tutorial
Thank you, your video is very helpful
At 11:00 the circuit has 4 N channel FETS, won't that just short the supply whenever there is a positive voltage at X1 or X2? The upper ones should be P channel, no?
Well, that's my bad. The top MOSFETs should of course be P-Channel MOSFETs.
fantastic video, cover every aspect of the servo i need to know...
Thanks!
Some more info on how to create own servos is available in my video about the Arduino Uno microcontroller:
Arduino Uno: control circuits and homebuilt servos
Very, very instructive! Muchas gracias!
+Daniel Perez por favor!
impressive video
Think you very mach. 謝謝您的分享,受益良多.
+張貴勛 You're welcome!
I love booles-vifes signals! ;-) BTW, lovely point to point circuits.
Like your invisible circuit boards, very fancy :P
thanks for your efforts
Great vídeo ✅
Very usefull video. Thank you :)
This is awesome, thank you!
Very very nice tutorial
Ritesh Mevada Thanks!
Great job bro, keep going
Dear respected sir, please could you tell me which software have you used to see the output wave shape in laptop instead of using Oscilloscope?
+محمد مبارك حسين Muhammad Mubarak Hossain
I am using Openhantek with a DSO2090 oscilloscope:
ua-cam.com/video/haGg4iS-pFw/v-deo.html
I am building this circuit.
What four FETs are you using in this design?
Thanks in advance!
Which one is "this" circuit? Have a look at my pages to get details:
homofaciens.de/technics-base-circuits-servos_en.htm
@@HomoFaciens Thank You!
Basic question. What kind of wire to build your circuits on and where do you get it from? Thanks!
Its welding wire I got from a hardware store here in Germany. Solder points tend to crack. I guess copper wire would be a better solution, but sometimes I simply take what I have ;-)
AWESOME VIDEO!!!
Ajelet Hilmant Sprites Thanks!
Thank you for the answer. I have built a big paddleboat model whith a 12V 80W motor.A PWM unit controls the speed whith a potentiometer. The servo turns 90degrees but the potentiometer turns 270 so I cant fix them together so I have done some kind of mecanikel gear.Would have been better al electronic but I think it have to stay this way
Chris De Berg I suggest to keep that mechanical solution. Adding an electronic circuit to the existing control loop might worsen the result.
Very informative, and if you don't mind me saying, your accent sounds like a milder Arnold Schwarzenegger - I love it! :P
...if I would mind you saying something like that, I would sent one of my robots for termination!
www.robospatium.de is online!
Great Video!
Thank you very much for such a great quality video!
Can you please make a video on BLDC motor and its ESC?
Brushless motor control will become part of my series about "Physical Computing". Stay tuned!
Good God, you are so smart!!!!
Thanks!
...I'm trying to get smarter with each video I am recording. In the time before this one I never had soldered a window comparator circuit...
I'm still learning.
When I am using an integrated H-bridge such as an l298n, then can I directly connect the tiny servo's motor outputs to the input pins of the H-bridge without using comparators?
No, you still need the comparator.
There mistake picture on 15:16 D6 and D7 should put DOT there so connect to motor, and also D8 and D9. (is this correct?)
D6 to D9 are flyback diodes. I can't see where there is a mistake in the schematic.
yes it is, should it connected to motor? because from schematic it just 2 diode from gnd to +.
They are usually connected close to the MOSFETs, because these are the devices to get protected by the freewheeling diodes.
Alternative "H" bridge, Transistors:
Upper two, PNP,
Lower two, NPN.
That's how an H bridge is usually made. I don't see where the alternative is?
@@HomoFaciens Hi,
You have done a superior job here! I was simple trying to figure out how the circuit works.
Maybe a look at my page about servos helps even more to understand. There you can see the circuit layouts:
homofaciens.de/technics-base-circuits-servos_en.htm
Amazing great video. Thanks for making it, I enjoyed and learned much good things.
Do you project kit ready to assemble for practice???? Let me know. Thanks again.
Thanks!
I won't provide kits of the servo electronics. The circuit layout is anything else but perfect, thus only for educational purpose. If you'd like to build one by yourself, have a look at the project page to get the wiring schemes:
www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
hello.I have a couple of questions if you don't mind :D that is an integrated circuit or a microcontroller?I need a servo for an RC car for turning left or right and I have no ideea how to connect the servo to the receiver (4 channels).The transmitter haves obviously 4 signal outputs with basically push-to-ON switches.Can I use on one channel insted of a switch a pottentiometer like the one you used on the video and directly connect the signal orange cable of the servo to one afferent channel output of the receiver?I need this for my bachelor degree.if you have any indication that would be greeat and I would be very thankfull.
Liv Manole I have not idea what you are talking about. Have a look at the project page:
www.homofaciens.de/technics-base-circuits-servos_en_navion.htm:
I have no microcontroller used in this video as you can see in the schematics. Maybe that helps to solve your problem..
HomoFaciens I was referring to the operational amplifier(aparently). Anyway,the project page is very helpful .thanks
Liv Manole The videos are just one part of my projects.
German´s are very good teachers.
Diogo Phillip Dias de Souza b
Can u give me the 2 ic no?? Plz told me..
What IC number? A time code would be nice.
hi, @ 5:11 what sort of ic is that ? also, can i use that type of setup for a home made servo ?
i order a bunch of L293D ic chip, 10k Pots (& digital pot "mcp41010" just incase i can shirkify the setup).
Will all this be enough to put together a home made servo ?
i also have some dc motors as well as 3D printed gearbox.
just in-case i got some 555timers and Op-Amp.
+Frank Lopez It's an op-amp type LM324N. You can get the schematics on my project page: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
+Frank Lopez The schematics are available at: www.homofaciens.de/technics-base-circuits-servos_en_navion.htm
The maximum current of the DC motors must stay below 600mA when using L293D H bridges. Consider that the quality of the circuits in this video is clearly lower than that of commercially available servos. It's for demonstrating how thing work.
Half the arrows of your FET's at the 11 minute mark are pointing in the wrong direction (Half should be n-channel and half p-channel). However at the 15 and 28.50 minute mark you can see the correct schematic with the correct FET's.
Either way it is a good explanation and awesome video. T.U.
...yes, my bad! Unfortunately videos can't be edited...
Thanks for your feedback.
Orlando Da Silva
Hi thank you a lot for the great simple explanation
We are building a 20 by 20 cm robot using two 14 kg.cm servos
The problem is that the servos cant keep a steady low speed , the servo internal control board seems like it is reseting repeatedly and randomly.
Strangely if we give the servo an initial signal from the arduino then we disconnect the arduino, the unstable speed behavior stops
Plz help us we have a competition coming and we need your help
You are talking about a servo for continuous rotation?
Modern servos have a built in microcontoller which could cause your trouble. Maybe it does some recalibration when reconnected. Something that also can cause trouble is temperature. If the H bridges heat up during operation the electronics might drift and so chage motor speed over time. So the only tip I can give is trying another type of servo.
Dear Sir,
I learned a lot from your video. Thanks for your enormous effort.
I have one question. Can H-Bridge be build using combination of NPN and PNP transistors instead of IRF9Z34N and IRLZ24N?
You're welcome!
Yes, you can also compose an H-Brige of NPN and PNP transistors as demonstrated in my video about that circuits:
Working priciple of H bridges
and written on my project page:
www.homofaciens.de/technics-base-circuits-h-bridge_en_navion.htm
Bipolar transistors are more tricky to handle, since the base current has to be considered, which is very high for high power types. This type of H-Brige can't be driven directly by a low power op-amp as used in the video. You have to insert an additional amplifying stage between the op-amp and the power H-bridge.
Dear Sir, Thanks for your feedback. Can you please also suggest that how can I have a soft start and soft stop speed of the motor in the beginning and at the end position respectively of the servo motor? Higher capacitor in H-Bridge may some how help? I guess not to a big extent or?
Inserting a capacitor in the H bridge won't succeed. I will soon (probably in some weeks) publish a video about microcontrollers, demonstrating how to build digital servos. I guess something like that would be the best solution to your problem.
...sorry for my late response, but I did not notice your question until now...
HomoFaciens Dear Sir, Thanks for your reply. I am waiting for your video about microcontrollers. Thanking for sharing your knowledge, a great effort from your side.
Hello, i it possible to modify servo in a such way, so that value from the potentiometer is read by the arduino as well? So that micro controller can detect situations where servo is commanded to assume position but it did not (perhaps some mechanical obstruction)
+Davorin Ruševljan
Yes, you can read the servo position through the wiper and an analog input of the Arduino, assuming you know how to do the coding. Don't forget to limit the input voltage of the analog input (in case your servo operates with more than 5V).
Thks
Have u any idea how to transform a PWM signal from a RC reciver to a PWM signal that controls a DC motor?
Chris De Berg The really simple way is buying a RC motor controller ;)
Using an Arduino is simple if you are skilled in using microcontrollers. Analog circuits are tricky to implement. You can try to convert the PWM signal into a DC voltage as demonstrated in the video and reconvert that DC signal into a PWM signal through an astable multivibrator if you'd like to learn how it works. It will be a long way to build a good quality circuit that way...
what program did you use for the simulation? Thanks,
It's some coding in JAVA I did just for this this video.
Muchisimas gracias el mejor video en su tipo ,Y el mejor INGLES que he escuchado!! No necesite leer entendi todo clarito: Pregunta para ti Tengo instalados en mi aeroplano 4 servos Futaba S3305 para trabajar en 6volt , pero se ponen a conversar entre ellos que parece una camada de ratones ! y los movimientos son lentos y pobres me comio la bateria de 6V en un ratito Le puse 12V y andan PRECIOSO no conversan mas y trabajan sin problemas ; es Peligroso que se quemen? NO calientan ,
juan asanelli ...if you expect an aswer, please post in German or English. The result of Google translate did not make sense to me...
Ok My Friend No problem:Thank you so much the best video of its kind, and the best I've heard ENGLISH !! No need to read everything I understood ALL: Question for you I have installed on my airplane 4 servo Futaba S3305 to work in 6volt, but get to talk to each other seems a litter of mice! and movements are slow and poor ate me 6V battery in a while I put 12V and walk PRECIOUS not talk and work more smoothly; Is Hazardous to be burned? NO heat,
juan asanelli ...I still don't understand your problem. You are using 6V Servos with 12V?!? I have done this accidentally with a servo while recording this video and scrapped the device...
Yes My friend ,but is the form that this operate if not they talking adn jerk and NOT working The actual battery is 7.5 volt 2100 ma
nice. I was searching for diy servo videos. I think I can make one now. It would be very kind if you provide the name of the components used here. Love from bangladesh🖤
Why not having a look at my pages, as I told you in the video?
homofaciens.de/technics-base-circuits-servos_en.htm
But keep in mind the circuits are just for understanding how things work, not for making a useful servo. I have made a big servo based on a Raspberry Pico and the video will go live, soon. Stay tuned!