Raspberry Pi Robotics #2: Zumo Robot

[@fahadahmed480]

trust me you can't find any better tutorial on getting into robotics with pi all across youtube till this date

[@ExplainingComputers]

Many thanks. :)

[@muhammedshareef2611]

Till now😊

[@superbros1690]

I agree it’s so difficult for my class project, kind of really sucks!!

[@deveric0]

@@muhammedshareef2611 yeah

[@Jozie88]

I love the way you speak and teach. You're not too slow, and not too fast. Your voice is very easy and effortless to follow and you always explain everything in good detail without being boring. :) Ty so much!

[@Jozie88]

One (or two) questions! How much did it matter which GPIO pins I use for L298N motor controller? If I want to connect more stuff on my PI at the same time, like LED matrix (4 pins plus ground if I remember correctly) and ultrasonic distance sensor HC-SR04, do I run out of GPIO pins which I can use? I'm still a bit lost with those ^__^ thanks in advance.

[@ExplainingComputers]

You can use any of the general GPIO inputs to connect to the motor controller -- look at about 5:36 in my GPIO Inputs video here kzbin.info/www/bejne/hHLPXoiCesanqtk to see which pins they are (there is a diagram, lower screen). You will run out of available pins eventually, but not I think with the devices you list and running the L298N. :)

[@robertpendergast2620]

I hope you will do some more robotics. Your presentations are so clear.

[@NickGamingxns]

Robert pendergast r

[@64_bit80]

you are the only coherent youtuber explaining how to use a raspberry pi. actual god

[@mike_vahemoubayed8099]

Best Robotics and Python tutorials ever created!

[@ExplainingComputers]

Wow, thanks!

[@thomascott7425]

Mister Barnett, you do an excellent job of making the difficult to comprehend and making it quite easy too digest. You are a gifted instructor. Thank you for all of your videos.

[@ExplainingComputers]

Many thanks.

[@bunny.bunbob]

how can one person be so damn good at thinking from a noob's perspective? he basicly clears all the assumptions that have to be spoken out for my skill level.

[@JohnRaschedian]

Invaluable videos. Learning what you learn in one of these videos would take you days and weeks of reading!

[@deangtspecial6689]

I just discovered your channel via a comment in another channel. I am impressed a thousand fold with the presentation. I must say I wish I had you as an influence when growing up. I learned a lot from a single video (the previous one of this series) and it was my first one I have ever watched of yours. I have experimented with an Arduino, and own a kit. I was looking into the Pi as a friend said you can link them to hardware too using an IDE and special libraries, and was looking into chaining both. Had no idea how it worked as I do not own one yet. Now I need a Pi, badly! I will recommend you to anyone who wants to know more about it as you present well.

[@ExplainingComputers]

Thanks for your kind and positive feedback. :)

[@paulgriffin8566]

Chris, many thanks for taking the time to put this and the many other videos you have together. The RPi and good people such as yourself have helped rekindle a passion for technology I haven't really had since I purchased my Commodore 64 so many years ago.

[@spharge]

Excellent tutorial. Certainly one of the better ones I've seen on the Pi and motor controller boards.

[@spaceinvader4565]

im really enjoying your vidoes they are fairly clear and quite easy to understand, especially for someone young like me. ive showed my friends who are also 12 (like me) and are also enjoying your tutorials. Saving up for a raspbery pi CANT WAIT

[@TheStickofWar]

Thanks for this, just started studying Computer Science Artificial Intelligence in Robotics and this video got me interested in order a Pi and some components to start toying around with in my spare time!

[@knowledgeis5855]

Great vids. I just started programming Python recently. This has been a sleeping goal for way too long (over 10 years). I have found my first practical application with this series. Thanks.

[@ExplainingComputers]

You may appreciate a video I am posting on 12 June all about using GPIO pins as inputs. It is a quite a long video and features a ton of Python coding that builds on what is in this video.

[@roshancheereth7540]

Christopher - This was one well made video - crisp, concise and value added - equally balanced for experts and novices. Thanks a bunch for helping me understand quite a bit about Raspberry Pi and how it can be applied! Keep doing this great work!

[@abhijack.1036]

Sir my twin children who are in 7th grade learned from your video regarding python coding. Now they are explaining to others. Do you like to see their video? There in no better tutorial in the whole of internet than yours until today

[@MrVayga88]

I hope you are still making these tutorials sir. You are such a great instructor. Thanks you very much.

[@ExplainingComputers]

I post a new video every Sunday. :)

[@boiii9793]

urs are the most least confusing videos and the explanation is pretty good.hope to see the next video pretty soon.

[@MrMoonpie001]

Wow! What a nice simple yet in depth discussion on robotics! It makes me wonder why it took so long for a company like Raspberry to immerge? The combination of the demonstration and the code has been a real treat. Thank you Chris for all you do and I look forward to the next generation of Pi and your next video! Moonpie

[@Umtree]

Well paced, straight to the point. Awesome video.

[@jamestaylor5409]

Like those who posted before me - love the quality of the video and the presentation. Please do more! I would especially like more on the Zumo robot using a battery pack, WiFi connection, and then some input (camera, sonar, whatever).

[@AngeloGi]

What an amazingly fun video! Thanks for that! Your presentation and production value is what makes it. Keep it up please!

[@ExplainingComputers]

Many thanks! There will be more videos. :)

[@keithhoughton4308]

Angelo G.

[@caharkness]

Great videos! The video quality is phenomenal and you're straight to the point every time. If you do happen to try mounting everything on the motor body, please upload a video. Everyone's looking forward to that!

[@NickCornaglia]

I really enjoy your videos. Very clear and entertaining. Thank you!

[@ExplainingComputers]

Thanks.

[@pong301275cmu]

very nice tutorials, Love it thank you for your kind

[@agcreatortn]

Great video and tutorial. Very easy to follow. For anyone watching this video and building along with it please be aware of your hardware. In this video the presenter is using an older RPi with only 26 GPIO pins. The RPi 2 model b and the newer RPi 3 b and b+ broads have 40 GPIO pins. I had to change pin 7 to pin 12 for code to work properly for me. pin 7 was in an on state after boot on my board. You can see the state of each pin after boot from terminal ~$ gpio readall. I learned this the hard way. On my board some gpio pins are in an "on" "up" state. As stated above when looking at my table after running ~$ gpio readall bcm: 4, wPi: 7, name: gpio. 7, mode: in, v: 1, was causing issues for my code. I change to pin 12, gpio. 1 (v: 0, this was key for me) and code executed fine. There are ways to test your gpio's for failure as well. one being gpiotest. you will need the pigpio liabary installed. www.raspberrypi,org/forums/viewtopic.php?t=180505

[@ExplainingComputers]

Thanks for this. There is no need to change the code or to us other pins with a new Pi (and indeed in follow-up videos I use a 40 GPIO pin Pi Zero with the same code). I strongly suspect that some of the pins on your Pi are damaged, and hence in a constant "up" state.

[@agcreatortn]

I suspected this as well that i had damaged pins. I ran GPIOtest and they all passed. But I think your right, I think at least pin 7 for me is intermittently malfunctioning. I have a new RPi 3 b I just got over the weekend That I thought about testing. Anyways I think your videos are great for learning and fun builds. I am on zumo video 4 setting up ssh. I have a tank chassis that I am going to build following your other videos. I found a 5 in touch screen for the pi that runs off usb and hdmi and doesn't interfere with the gpio pins. I want to use this so I can lunch the code directly on the robot and expand its portability. I have question when using "curses", is there a way to only have the motors turn when holding down the directional keys and they stop when released?

[@BlazinSD]

Great video, it's like listening to Michael Caine's Alfred talk to Batman.

[@petabrain]

This is a very high quality video. I was very pleased to watch it fully, keep up the good work! :)

[@lgbonfim]

Great Job! I loved these vídeos about raspberry robotics!

[@markblake4584]

You always do great videos

[@rerere115]

Ordered my Pi 2, can't wait to try this.

[@ExplainingComputers]

+Sam “OfficialNerdsUnite” Lauer Excellent! And by the time you have, I will hopefully have made the follow-up videos I have been planning for ages!

[@rerere115]

ExplainingComputers awesome I can't wait.

[@robinder_]

+ExplainingComputers Hey there, do these tutorials you are making also work on pi zero?

[@ExplainingComputers]

+Videogame hacks Yes, everything here that does not require a Pi 2 will work on the Zero, although you would need to solder on some GPIO pins to do the robotics stuff, and also use a combined keyboard/mouse device -- or a USB hub -- as the Pi Zero has only one USB port.

[@robinder_]

+ExplainingComputers ok, thanks!

[@ismailakbari]

Awesome. very simple and understanding

[@juanmorel9533]

Génial, les démonstrations sont précises et claires!

[@tnek1tnek]

Very professional and informative. Thanks from this end of the pond.

[@matteoprada5851]

Grest work guy, you are the best😀

[@AshanBhatoa]

This Video is very interesting plus I like robotics and this video told me how to control their motors.

[@MekhiStafford]

thanks for sharing this with us u really inspire me to keep trying to accomplish my dream of becoming a computer engineer

[@АндрейКузнецов-э2э]

Thanks for clear and very interesting videos about Raspberry. I will wait new video.

[@JamesNortonJones]

Thanks for this. It got me up and running really quickly.

[@ExplainingComputers]

+James Norton-Jones Excellent! :)

[@Safa-po3oc]

Fantastic video as always. I would love to see you develop this further as you said in your video with a camera and possibly wifi controls. Wishing you the best of luck with your videos and future Pi projects.

[@ExplainingComputers]

+The Kount Taking this further is on my production list for early 2016. :)

[@JottyOL]

Thanks for Your great videos! I am german but your videos are worth to remember all the english lessons at school 😃 I really would appreciate more robotics videos with the Zumo! May be You could give him some sensors? Thanks in advance!

[@mtbevins]

Thanks for the great videos. I really enjoy them. You are so clear and concise.

[@westcountrybob2521]

Thank goodness for this video. At last I realise I dont have to be a complete NERD to understand what is happening without being overwelmed with technical talk.

[@sidharthcs2110]

great explainer on KZbin

[@jdragon8184]

this is 2014 sir this is awesome

[@davidprendergast6425]

love this channel.👌👍

[@talhasiddiqui3074]

Wow what a brilliant video. Thanks for explaining

[@robindow5742]

hi christopher great project in fact i was so interested i bought a very cheap crab kingdom chassis and used your code and instructions works great am going to add line follower and echo location at some point and maybe even a robot arm keep up the good work

[@ExplainingComputers]

Excellent -- thanks for letting me know about your success! :) This is what KZbin is all about. Note that I have various follow-up videos, including a line follower: kzbin.info/www/bejne/kGbCaYmXbbarpLs

[@DipanjanBiswasgoogle]

Wao sir you're awesome at what you do.. Subscribed and waiting for next videos

[@jerryrichard4994]

Good morning I'm a beginner , you make your videos so interesting, your are a fantastic teacher the way you speak and present your videos so easy to understand, my question is can you use 2 controllers without causing harm to the PI, I await your answer, thanks

[@ExplainingComputers]

Yes, you could use 2 -- or more! -- controllers. There are plenty of GPIO pins to drive them. :)

[@jerryrichard4994]

Thanks for the info I shall proceed with my new project

[@ahmadabdullah6608]

you video lectures are so clear and very informative....................... can you please share some book with me to learn raspberry pi ????

[@asitaliano1]

A very professional and informative vid. We appreciate your instruction and effort. Keep up the great work.

[@theeasywayoutcampers6550]

thank you for making this video.

[@langtupt]

Hello Chistopher, I enjoyed your video, thank you for sharing.

[@beck4u2]

Looking forward to the next video!

[@serceband]

I do not want to advertise so I won't put any links, but a lot of Pololu gear can be purchased from China (actual suppliers of Pololu) for a fraction of the price. My motors had arrived and I'm 99% sure they are the same thing.

[@Arthur-ky1nc]

can you tell me which shops you mean pls?

[@MrCharlypesc]

same here, i already everything on china...i buy on aliexpress.

[@prokolu]

Great video, fantastically explained. Please, do one with stepper motors and joystick controlled motors. Thanks!

[@krzysztofgawryluk4501]

Well explained. Good job.

[@lieutenantmiller2039]

Fantastic video! I want to do the same project except using the Tamiya tracked chassis with dual motor gearbox. I made Tamiya tracked kit radio controlled a year or so ago but of course, that’s not a true robot.

[@ExplainingComputers]

Thanks -- do checkout follow-up videos in this series: eg kzbin.info/www/bejne/jqeygIGGiNSaors

[@robertpendergast2620]

Very nice video.

[@kadaliakshay6770]

hmmmm, i give a 5 out of 5 star for this explanation!

[@MrDemonshalo]

amazing series. Thank you. please do more!

[@RedsGamingArcade]

Yes, please do another video about inputs through the raspberry pi, then how to make it do an output off of the input!

[@ExplainingComputers]

Reds Arcade I used a pack of 4 AA batteries to power the robot motors. I will do an output GPIO video at some point. :)

[@MasterGamingChicken]

Great Tutorials and all videos! Thnx

[@joshcarz]

Just so everyone knows. The motor controller 5v pin is an output pin. This is not for bringing 5v into the motor controller but for sending 5v out like powering the pi with the output. No need for his usb battery pack. He could have just run the 5v out to the 5v pin on the pi and it would have worked.

[@joshcarz]

Thanks for your videos.

[@darsonsilungwe8884]

Wow Thank you so much! Amazing presentation.

[@HKey_Root]

Thanks once again for another inspiring vid. Presumably one could mimic a stepper motor depending on the resolution of the time function in IDLE? I had in mind to control the spindle on a variable (butterfly/air) tuning capacitor robbed from an old radio, to be used in loop antennae etc., so the tuner could be remotely controlled. These tuners don't rotate 360° so I guess some canny coding will be required so no attempt is made to rotate the motor out of range.

[@ExplainingComputers]

It would be hard to mimic a stepper motor as yu suggest. A Pi can also be used to control servos though (and stepper motors). I did a video on servo motor control with a Pi quite recently: kzbin.info/www/bejne/rnmnhWd5rM-Ih6c

[@HKey_Root]

@@ExplainingComputers Ah, thanks. I did miss that one. I shall go take a look.

[@pourkin]

Excellent tutorial...thanks

[@RickHenderson]

I already have a Raspberry Pi and I've ordered a Runt Rover frame (the Whippersnapper). I want a Zumo as well, but they seem to only sell them now as Arduino bots. Maybe I should double check. Anyway, the new Zumo 32U4 looks awesome you should check them out Chris! I'll totally do your LED tutorial.

[@DestinationDub]

Thanks so much - very clear and well explained.

[@hassanrazakhanbiz]

Nice video, very helpful for beginner, like me. Thanks for sharing it..

[@anuragtejwani9233]

Really good videos Tysm man

[@dvigas7547]

Very good video. I have a question. Could I use any RC car (buy one) and put the Raspberry to control and sensors? RC with any voltage as: 4.5V, 6V, 12V? Thank you.

[@ExplainingComputers]

Yes, you could indeed use a Pi and an L298N to do just that. See also my follow-up videos, and info on this page: www.explainingcomputers.com/rasp_pi_robotics.html

[@dvigas7547]

ExplainingComputers thank you. I will see and try. I saw your video and I’m very excited to do that with a cheap RC car that I bought at Argos.

[@afrotubiz]

je ne comprends pas l'anglais mais ses vidéos parle d'elle même!

[@RedMageGaming]

I don't think the motors are slipping, I think its because one motor is starting before the other. Since python is an interpreted language, going top to bottom, it activates one motor, then immediately afterwards the next motor.

[@ExplainingComputers]

I see your point, but the time difference will be extremely slight -- less than 1/1000th of a second.

[@jcgon_fpv7076]

very good tutorials¡¡

[@cuonglq8]

Thank you so much! I love your video.

[@boowonder888]

beautiful little motors! I recently found similar high quality 12v motors in an old vhs machine. No gearbox though. If I learn another language, it will be python. I knew some BASIC, HTML mAYBE it will help. Because the script got to be quite complicated in the end. Or maybe it just seemed that way because of all those loops.

[@mohamedanaouch2322]

thanks you for all

[@artsofpixel]

Very good sir its goes to be more intresting

[@vimalrajayyappan2023]

Love you man

[@ExplainingComputers]

Thanks -- will do!

[@MicroProjects]

very nicely done

[@ExplainingComputers]

Thanks,

[@iqoptionmoneey658]

happy new year

[@hemu2315]

your video is extremely useful for me...i'm eagerly waiting for the next video i.e.,controlling the robot using wifi and placing a camera on it...i'm doing my project on that.please please do help me in that.thank you

[@MicrobyteAlan]

Fun build

[@garagebandguy7722]

very helpful video. 10/10

[@hilarylatham3917]

Brilliant! I'm hooked!

[@Theytrewq100]

Great video, waiting for your followups!

[@ExplainingComputers]

Fairly soon now . . . :)

[@darksoul7025]

from where could i find the code ?

[@Theytrewq100]

+ExplainingComputers that's great to hear

[@hpalm051269]

I have connected up just like the video suggests, with the rpi3 and battary pack unplug. Now I give the rpi3 power and connect the battery pack the motor starts moveing automaticly and does not stop.

[@ExplainingComputers]

Run the code (maybe with the battery pack unconnected), and let it finish (which will execute the GPIO cleanup command. Then try again. Also see the bottom of this page for info on different configurations: www.explainingcomputers.com/rasp_pi_robotics.html Good Luck!

[@hackernoobtutorials]

You are the best

[@samseed666]

You are awesome Thank you.

[@madmarshman]

@ExplainingComputers are the #2-56 screws and nuts supplied with the chassis the same size as M2 in the uk? Thanks for any help.

[@Flowlance]

Amazing! I need to order these parts... :D Really inspired by your video.

[@Ванюша-у8т]

Many thanks. But can it possible to control speed of motors whith this set or just direction ? (sorry for my english)

[@pranavrathi211]

What kind of motor is used above? Because you are able to spin motor in both directions. And I am using normal dc motor it spin only in one direction

[@ExplainingComputers]

It is a normal motor here. The key element is use of the motor controller -- the L298N. This can be hooked up to one or two motors, and then four control pins are fed signals to spin each forwards or backwards.

[@ExplainingComputers]

Ah, I see we corresonded before! :) If you have your motor connected to the L298N you should be able to turn it in either direction depending on what signals are being sent from the GPIO pins on the Pi. If things are not working, check your wiring and code.

[@4nomades]

very nice!!!! congratulations!

[@fredericrouxdrphilnatdiplp3314]

Thanks for the great tutorial. The front wheels, are they supposed to be quite stuck relative to the back wheels? I haven´t connected them to the board yet, but I am not able to move them by hand. Guess this is how it should be right? Thx

[@ExplainingComputers]

Yes, this sounds right. The front wheels are connected to the gearboxes and motors; the back just spin on their axels (until the tracks are put on). Good Luck! I hope soon to make two follow-up videos to this one . . .

[@lemkil76]

Great vid! Really inspirational!

[@tdinh5504]

Great video! Very clear :) I read comments and know that your 2 USB ports are used for keyboard and mouse; and the micro USB, I think, is for 5V power supply. I wonder, why don't you use the power from batteries for Raspberry Pi as well? Also, can you make another video using wifi dongle? (instead of connecting to keyboard and mouse via cable). I'd love to watch this from you as well :)

[@ExplainingComputers]

Frederick Taylor One of my next videos will be a setup of a Raspberry Pi 2 in a case, and with a WiFi dongle and wireless keyboard.

[@tdinh5504]

ExplainingComputers Thanks for replying! can you answer my first question please?

[@ExplainingComputers]

Frederick Taylor Those batteries (4x1.2v) would not reliably supply the Pi (5v). :)

[@xz86]

Thanks for the videos. If I want to build a complex robot or for home automation that’s need more than 100 input and output signals, is it possible to do that with raspberry? Is raspberry giop expandable?

[@ExplainingComputers]

You would, I think, need to add microcontrollers (eg Arduino) for that. I've never come across expanded GPIO on a Pi.

[@johnjakeman7391]

please could you tell me which moters to buy are they 2 x Micro Metal Gearmotor (Extended back shaft) - 298:1 from pimoroni