Is LIDAR easy to use for hobbyists? DIY Roomba? Obstacle Avoidance System for Robotics
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- เผยแพร่เมื่อ 17 ส.ค. 2019
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In this video we will have a closer look at a commercial LIDAR sensor for hobbyists. We will find out how the sensor manages to measure the distance to objects placed all around it and how we can use this data with a computer and an Arduino. At the end I will then create a small robot which uses the LIDAR system to "crudely" navigate through a room. Let's get started!
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Music:
2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod
(incompetech.com) - วิทยาศาสตร์และเทคโนโลยี
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Small correction: The speed of light is of course 299792 km/s, not 299792 m/s. Sorry.
Wow, that was a freaking fast
You never reply to any comment, why?
That's disappointing! I was so excited to shout in the comments and have likes rain on me then I saw this comment 😪
Hey what is the name of the song you are playing around 1:38? Its not listed in the video description btw.
#GottaGoFast
This sensor dosent use time of flight (tof) which would be terrible expensive. It measures the angle of the returning lightbeam with a linear ccd. In the description of the sensor they also write triangulation principle.
Yep it is a parallax system, however Y
You can actually build a ToF sensor with relatively inexpensive electronics, issue is they're not fast enough for this kind of scan rate.
Actually, there are ready-to-use pretty cheap ToF sensors. VL53L0X by ST for instance.
Exactly. This most probably is the triangulation sensor for vacuum cleaner robots working using triangulation and NOT ToF. There is a paper of 2008 IEEE International Conference onRobotics and AutomationPasadena, CA, USA, May 19-23, 2008; Kurt Konolige, Joseph Augenbraun, Nick Donaldson, Charles Fiebig, and Pankaj Shah: A Low-Cost Laser Distance Sensor. But unfortunately many youtubers are mixing these things up.
@@kotqrka that thing looks interesting. Thoug it doesnt measure very far and only distances in 1D not 2D, but thats only a matter of time. It is a while since i looked into the 2D sensors and they are still to expensive for my purposes, maybe sensors like this could push the price down even more
well, using latest stm32g4 that has timer with resolution around 180ps it's possible to build tof sensor with res around 60mm
How amazing is the communication between the main board and the part that rotate... Fantastic
ok
Lifi
Agreed
This was used in VCRs, it's even more elegant in VCRs, as the rotary transformer used to transfer both data and power
And the motor is brushless motor that can run for years without the need to replace brushes
OMG OMG I was looking for this for so long and finally Scott talk about it.
Man, you just get a thumbs up for being awesome...and we haven't even covered how smart you are.
I'm always impressed by your videos and I've learned so much. Thanks for taking the time to create them.
THIS IS VERY COOL. Thanks for making all these interesting videos. I wanted to make one of these myself, this is some good motivation!
Keep up the great work
"Terrible at writing code"
"Limited success"
You and I have very different definitions of "terrible at writing code" haha!
You don't get better if you like your own work! crippling self-doubt is where talent is born.
He's really good in my opinion. I wouldn't know where to start with writing code. Im a hardware person.
@@simontay4851 I'm software person. Hardware is hard. Software is... soft.
@@simontay4851 Start by stealing other people's code. Meaning use libraries that do the job you need
Have you seen his code?
Great video as always! To use the Lidar in an easier way, you can use Robotic Operating System (ROS) to handle the data and do the make a program to control it. However, learning how to use ROS is one thing, but once you know it, it's really helpful!
Wow this is one of my favorite videos! You did a fantastic job explaining. Thank you!
This is exactly what I’ve needed for my projects thanks scott
Thanks a lot for the 1 year elektor subscription I am gonna keep it brief so, many thanks... :)
The "stay creative, and I will see you next time!" has been getting slowly more enthusiastic as time goes on.
I've noticed the same thing.
crazy, rihgt?
@@justgame5508 yes that may be true. It's just an observation I made.
Thanks again for lighting up our world in regards to electronics....huge fan 🤗🤗🤗
Mahalo. Always great detail. I can't wait to read the magazine.
Omg the fact you posted this video after the fact I was think it would be cool to try to make a lawnmower that’s self driving kinda like a roomba, I crazy it’s like you read my mind! Awesome video by the way!
Elektor is awesome, got that since 80's
Thank you (and Elektor) for the subscription
This was very instructive. Thank you!
One's again thank you for useful information about electronics
Thank you for one more very interesting video and also for the elektor gift!
so many thanks to bring this innovative electronic component to me!!
Excellent presentation, audio & visual.
Thanks for the subscription code. I'm signed up and ready to get my electronics fix. 🤓
great work!!!
0:08 very nice drawing. Your schematics and explanations are awesome.
I watched within few minute but the total viewer at that time reached 5k.. it shows how much popular is ur channel... Keep doing and stay creative.,😀😀
Os melhores vídeos de eletrônica!!!
I'm great fã yours Scott
Great video! I have learnt something new from you
Thank you for the elektor code GreatScott. I love elektor but getting access for free is fantastic.
Yeah. A full year is amazing.
The only electronics channel to spend time that worth every single second....
Great Scott! Good job. I used large lidars and this one seems so similar! But smaller.
First robot on scott channel
We love to see this type videos in future
S
Awesome! Perfect timing!
This is new subject for me and I learn lots of from your channel and in the ending of your video when you say stray creative and see you next time. so goooood
Yep, I don't think this module using ToF to sensing the distance, because it require a Time-to-Digital converter(TDC) in the system usually it require a addition IC or FPGA, a counting based TDC can be implemented in STM32 but the resolution can not be promising. So this module seems to measure the phase difference instead of the time difference.
The datasheet does actually say that this modules does use triangulation with a low resolution infrared camera sensor
However, some versions of STM32 microcontrollers have programmable DSPs onboard that are powerful enough to render 3D graphics or do radio communication
@@PixlRainbow Great to know that, thanks for the information.
Makes sense. I already wondered how an STM32 can be fast enough to measure the distance by the travelling time of light. That's fragments of nanoseconds for short distances in a room.
As Always Great I love it thought i found this video a bit too late
XKT-412 is a voltage controlled oscillator. I have used this in my wireless POV display project to make an LC oscillator.
Tfw I never realized power supply and communication would be a problem for a spinning sensor. My first solution would be running a separate battery on the spinning part and using RF for the communication but damn...wireless charging coils? That's some brilliant stuff right there! Thanks for the upload. I learned a lot.
Maybe convert the LIDAR robot as your garage's security guard bot?
You can run any Arduino at 3.3v and it will just work. Also you can
take 3.3v as a digital high in a 5v system and use a voltage divider or zener shunt to output the 3.3.
I know Scott knows this, but sometimes his individual choices come out sounding like what he “had to do” instead of what he “happened to do” this post is for the “I already have an Arduino why can’t I use that one” crowd. To which the answer is you can. Just don’t push 5v into the lidar without checking the data sheet for tolerance.
Yeah, you would think everyone would know this if they have an interest in robotics and electronics. Folks need to pick up a textbook every now and then. Couldn't hurt.
I’m glad you showed how the data and power is handled, I’m always interested in how that is done inside devices where it spins more then 360 degrees. (In this case it was LEDs for data and coils for wireless power)
When it goes past 360 degrees, it creates a tiny worm-hole that objects can pass through and arrive in another part of the Galaxy. It doesn't have enough power to transport outside that range at present, but they are working on it.
I had to know how it transfers data through spinning disk you explained it nicely 🙂
Another great video! Thank you. I always learn and thumbs up 😊
Thanks for the subscription to elektor
Great video man!
Pretty interesting project!!! 😃
Wow it's amazing
Thanks Scott for the free magazine! No credit card needed! 👍👍
it may be the first in-video ad I've made use of. Short, backed by GreatScotts long term interest, no risk trial. Very nice.
Good Video by GreatScott.
Bro you are a legend..!!
Nice video and keep it up!!
Great innovative ideas generate after watching ur videos and can understand the theory which we learnt in schooling
Great video. Thanks for sharing.
LIDAR great - I was waiting for this video
Keep up the good work and thanks :)
Very interesting to see how it works
It's always cool when a sensor uses a more powerful chip as a coprocessor (stm32f302 iirc?) than your main system controller (poor little atmega328p...). Though, I suppose such a topology would make good sense if the coprocessor was only needed intermittently and could be put in power save most of the time.
A little surprised they have so much rotating mass on that unit, I figured the only thing to rotate would be a mirror.
"YDLIDAR get Scandata fialed!!" lol Nice typo in the source code :P
Interesting 👍
What about a DIY or BUY episode about LIDAR-Sensors?
Great video.
It's not that big of your fault. Those cheap robot kits come with cheap motors as well (the yellow ones) the main inconvenient is that they spin at different speed even they receive the same PWM because they are not identical. In a project we made, we tried to control them with a PID using a MPU5060 gyroscope, and a Ultrasonic sensor to prevent for crashing into the walls. The PID was a fail. Hope you could succeed. Excellent video. Greetings from Ecuador. Also try tu use a L298 driver for the motors they are a big help.
Very nice project 👍 I like it
Haha the robot turned out so cool. Great work.
I used to love Elektor since I was a kid, every month I bought it, from my 9's to my 14's, when I started working in industry and finally got a way to subscribe and receive it every month at home.
It really was the best electronics magazine in Brazil, until it fooled around every subscriber, simply disappearing, no phone to ask to refund (I subscribed for annual payment), just there they was in one month and gone in the next.
I feel it as one of the most disappointing experiences of my life, since I loved all of their contents.
Well, I started importing the magazines from another countries once in a while, to tell you how good their contents are, but I'll never forget how they fooled brazilians.
Yo this was amazing
I feel you ran out of time for the video, when it started to get interesting and fun.
Don't let TH-cam burnout get you :/
Dafuq, why do you call him Chris?
@@DasInnereDesBrotes I can't say I know what his actual name is, but I'm guessing "Great Scott" is a reference to BTTF.
@@DasInnereDesBrotes Don't know why I think he's called that, maybe he mentioned it in older videos, maybe I'm just wrong :)
I'll remove the name from my comment, I wasn't aware it's a secret.
@@DieBastler1234 He did mention it a Q&A video. I think the first one.
Edit: this one th-cam.com/video/0Xo0oKr8Thc/w-d-xo.html
@@abdulazeez.98 No, it was sarcasm.
Super awesome video!! Keep up the good work. I wouldn't mind if there would be a follow up video
Great Job your little machine
Brilliant!
awesome, a couple of years ago i was looking for a lidar but couldnt find any good cheap options !
Well, I stand corrected, I always thought it stood for Laser Infrometry Distance And Ranging. :P You realise that only the really posh vacuum cleaner robots have a LIDAR on board, the rest are just "bump and guess" machines - they bump into an object, turn a random amount, and then continue on their way, hopefully not bumping into another object too soon, so they can do a good job at vacuuming the floor.
Even lower-tier robots are not that dumb anymore. Nowadays they use ultrasonic distance sensors that, while effectively doing the same thing, prevent them from actually bumping into most obstacles. They then consolidate their movement and obstacle data to create a map of the rooms. Some also come with a webcam that is pointed to the ceiling, effectively reading a mirror image of the room they are in to aide in mapping out the rooms. Thing is, ultrasonic sensors, low-res webcams and the SoCs to do the computing are incredibly cheap now. The distinguishing factor is the quality of the software.
Xiaomi S5 is cheap and amazingly good at navigating, using lidar, ir and probably more.
An other Great Video and an awesome offre!
You really should try to make a robot with the RPI and ROS (robot operating system).
The lidar has some really nice packages you can use.
Keep in mind the RPI should only be used as a data publisher to a real computer.
ROS for hobbyists?
I don't deny its capabl, butis it easy enough to learn? What about budget?how much for the whole system? Hobbyist servos ore closed loop servos?
I was working with lidar and arduino
It's not that hard.
There is some few library over internet to help.
If you realy have some problem with programming it doesn't help but trust me, for some student project lidar is a very good investment
Felt like I had a stroke reading that
Can you name some libraries to get started? Thanks
Im also interested in the libraries :)
Your next video should be... Robot vaccum cleaner diy or buy.
You are a great T E A C H E R!
Finally your sponsor has changed after a long time
I wonder whether the last one gave him a hard time.
In all likelihood it's only for this video.
Great video!
Always wanted to give LIDAR a try. Great video and thanks!
I'm almost dead nuts positive that's a parallax sensor, not ToF.
Great content!
Saw a glimpse of the laptop .. blsck with orange stripe. And the OS is not win10 or win8 .. win7?
So by any chance was that a Clevo or Sager laptop?
I’ve been considering one of those lidar’s for awhile as the other cheap methods like ir led or sonar are low frequency response and easily tricked and low distance .. will have to look up the distance on this guy
Thanks!
Great :)! just nitpicking here a little. But the Lidar doesn't spit out HEX values, it spits out binary data. Hexadecimal is only a representation of that. Also, I think a lot of the corrupted data might simply be because you have the TX and RX pins permanently connected, causing the LIDAR module and Arduino to talk at the same time, resulting in invalid bytes. Otherwise, cool demo :)
Hi GreatScott!!!
I'm your biggest fan since day 1, Could I kindly request for you to try and make LI-FI project please?
Thank you!
You are awesome!!!
you are great， indeed
thank you sir
Awesome video! I recently got the same Lidar. I'm using it on my ROS robot. The robot is completed, it's supposed to drive autonomously around in my room, create a map using the Lidar and find my mate tea cup using a camera. Once it's found, I want to get a notification with the position marked in a map. So far, I built the robot and worked on the mapping part. Maybe we could collaborate on a Lidar project?
So, did it work? LOL
I'd love to hear about the process!
Very nice video sir
Very interesting
Keep going :)
I would love to see more how they use wireless power transfer, what are the losses, would it be possible to use dual power transfer and get sphere lidar?
Hey Scott, how can I properly build an overcharge and undercharge protection for a 24V or higher battery?
Really you are awesome!
Waited... For along luv uuuu😘😘😘
AWESOME!
Elektor, I followed them in the late 70's, they're from Holland, I think it should be the same magazine.
Hi! Yes - we are the same Elektor! But today, we are not only a Dutch magazine. We publish in English, Dutch, French, and German. Our engineers, authors, and editors are from a wide variety of countries. We are truly global! We are offering Great Scott subscribers a FREE 1-year subscription to the digital version of Elektor magazine! Simply use the URL and code provided in the video description. A membership gets you Elektor magazine (digital), access to the Elektor mag archive, and more! At the bottom of the landing page on the Elektor site is info about the other language editions of Elektor. So you can read Elektor in English, Dutch, German or French. Enjoy!
In case You have 3V3 uart device and 5V version Arduino it also works nice if You attach to [Arduino RX]-[3V3 TX] ( most atmegas takes 2V7 and up as high, so 3V3 is OK ) and simple voltage divider ( from two resistors ) to Arduino TX to lower output :) Any way I like Your channel very much! All best!
“We feel like we are in “The Matrix”.” Now that was pretty funny!
If you are interested in trying some more advanced robotics projects you should look into using ROS (Robot Operating System). It is a great framework to easily develop robotic systems without needing to program everything yourself as it has many tutorials and a great community of developers that make libraries you can implement, including some to make use of that lidar for autonomous navigation and mapping
I might upgrade my old roomba with this
where has this video been my whole life
You can perfect self-driving using compass sensor & IR speed sensor
Interesting the way the lidar module was built. Wireless power transfer in this small unit.