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!
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.
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 czcams.com/video/NAl-ULEattw/video.html 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. :)
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.
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.
You are a GOD!!!!!! Thank tou so much!! 2021 and still nobody has a better tutorial. Of course now we are on Python 3.7 but still. The principles are the same!!
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!
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.
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.
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
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.
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.
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
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.
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).
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!
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
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!
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.
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
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.
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?
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!
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
+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.
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.
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.
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
Excellent -- thanks for letting me know about your success! :) This is what CZcams is all about. Note that I have various follow-up videos, including a line follower: czcams.com/video/Z5_8Va8QxnY/video.html
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.
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.
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.
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!
Hello Everything works ok when powered from 230 V mains but with the power of the battery (robot controlled remotely via wifi). I had to change the pin 7 to 12. Pin 7 ( power from baterii) gives then still 3.3V. Raspberry B+.
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.
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: czcams.com/video/xHDT4CwjUQE/video.html
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
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.
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
I tried rebuilding it and powered the L298N with a nine-volt battery. After some seconds the motor's speeds tremendously decreased and the battery got pretty warm (not hot). What is the problem here and how do I fix it?
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.
using this method of drawing a shapes with straight edges. How could I extend it to make my Raspberry pi go round in a circle of given radius "x"or any other curved shapes such as a rose "r = (a)sin(bx)" (Polar Coordinates)?
As soon as i connected motor controller with battery, the motor starts running. Why? Using same components from vidoe with same setup of wiring just I am using 9v battery.
This will be because you have yet to execute any code -- the GPIO pins will be in a random state until you have executed the code to set up the pins, and so pull them down to an "off" state. You need to execute the code, then connect the power to the motor controller. If the Pi's own power is not turned on, this is due to the setting of a 5V enable jumper on your L298N -- see the "Important Note" on my page here: www.explainingcomputers.com/rasp_pi_robotics.html Or, see the videos and wiring on this page (based on the same setup): www.explainingcomputers.com/pi_devastator_videos.html
hi there, i tried this but with a different controller board (with no 5v enable) and firstly when i try to run the python script it says an error due to the gpio's then as i am powering the RPi with a usb, then the modules with an external battery, i connect ONLY the ground to the gpio's and not the VCC (as there is no 5v enable) and when i do this even if the +5v VCC is OFF the module faintly emits light as if the ground pin is powering it? any help please. thanks Regards, Aran
So how exactly do we connect the ENa and ENb pins if the two jumpers aren't there? I have just connected them to pins on the Pi. How should I code them if I did this?
Could you make an example code in python 3.4.2 where you control leds by pressing keys on the keyboard? An example would you press a on the keyboard and a led turns on. You let go of the key and it turns off.
I tried building this exact thing. The first program works fine. When I try to run the second program my other motor doesn't run. Can you suggest why might this happen?
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.
hi, i wanna ask if raspberry pi can get input from its camera? bcoz i wanna make a simple robotics with raspberry pi that can be control using hand gesture recognition.
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.
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.
I tried to implement the project using an external power supply instead of the battery. L298N comes on but raspberry no. The power supply delivers 9V max 1.2A. Is it a problem of amps?
Possibly, depending on what Pi you are using. Also, you will need to set the jumper to get 5V for your Pi via the L298N -- I power this setup via batteries (6xAA) in this video: czcams.com/video/DyQxvfwQbTg/video.html
Because the inputs (sides and size) the user enters in the shell after running the code are strings. For the code to use the user's inputs to do the math, the user's inputs need to be converted to appropriate data types. Specifically, int (integer) for "sides" and float (float) for "size". This can be accomplished easily by changing the lines in the code to sides = int(input("How many sides?")) size = float(input("How big?")) Hope this helps!!
trust me you can't find any better tutorial on getting into robotics with pi all across youtube till this date
Many thanks. :)
Till now😊
I agree it’s so difficult for my class project, kind of really sucks!!
@@muhammedshareef2611 yeah
I hope you will do some more robotics. Your presentations are so clear.
Robert pendergast r
you are the only coherent youtuber explaining how to use a raspberry pi. actual god
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!
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.
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 czcams.com/video/NAl-ULEattw/video.html 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. :)
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.
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.
Many thanks.
Best Robotics and Python tutorials ever created!
Wow, thanks!
Invaluable videos. Learning what you learn in one of these videos would take you days and weeks of reading!
You are a GOD!!!!!! Thank tou so much!! 2021 and still nobody has a better tutorial. Of course now we are on Python 3.7 but still. The principles are the same!!
Excellent tutorial. Certainly one of the better ones I've seen on the Pi and motor controller boards.
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!
I hope you are still making these tutorials sir. You are such a great instructor. Thanks you very much.
I post a new video every Sunday. :)
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.
Thanks for your kind and positive feedback. :)
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.
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
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.
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.
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
What an amazingly fun video! Thanks for that! Your presentation and production value is what makes it. Keep it up please!
Many thanks! There will be more videos. :)
Angelo G.
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.
can you tell me which shops you mean pls?
same here, i already everything on china...i buy on aliexpress.
urs are the most least confusing videos and the explanation is pretty good.hope to see the next video pretty soon.
Great video, it's like listening to Michael Caine's Alfred talk to Batman.
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).
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!
I really enjoy your videos. Very clear and entertaining. Thank you!
Thanks.
Well paced, straight to the point.
Awesome video.
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
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!
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.
Great Job! I loved these vídeos about raspberry robotics!
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
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.
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?
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!
Very professional and informative. Thanks from this end of the pond.
This Video is very interesting plus I like robotics and this video told me how to control their motors.
Thanks for the great videos. I really enjoy them. You are so clear and concise.
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
Yes, you could use 2 -- or more! -- controllers. There are plenty of GPIO pins to drive them. :)
Thanks for the info I shall proceed with my new project
Thanks for clear and very interesting videos about Raspberry. I will wait new video.
Ordered my Pi 2, can't wait to try this.
+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!
ExplainingComputers awesome I can't wait.
+ExplainingComputers Hey there, do these tutorials you are making also work on pi zero?
+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.
+ExplainingComputers ok, thanks!
very nice tutorials, Love it
thank you for your kind
this is 2014 sir this is awesome
thanks for sharing this with us u really inspire me to keep trying to accomplish my dream of becoming a computer engineer
you video lectures are so clear and very informative.......................
can you please share some book with me to learn raspberry pi ????
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.
Thanks -- do checkout follow-up videos in this series: eg czcams.com/video/XvOONPSoglY/video.html
This is a very high quality video. I was very pleased to watch it fully, keep up the good work! :)
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.
Thanks for your videos.
Thanks for this. It got me up and running really quickly.
+James Norton-Jones Excellent! :)
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
Excellent -- thanks for letting me know about your success! :) This is what CZcams is all about. Note that I have various follow-up videos, including a line follower: czcams.com/video/Z5_8Va8QxnY/video.html
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.
I see your point, but the time difference will be extremely slight -- less than 1/1000th of a second.
great explainer on CZcams
Great video, fantastically explained. Please, do one with stepper motors and joystick controlled motors. Thanks!
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.
+The Kount Taking this further is on my production list for early 2016. :)
hmmmm, i give a 5 out of 5 star for this explanation!
Thanks so much - very clear and well explained.
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.
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!
Awesome. very simple and understanding
You always do great videos
love this channel.👌👍
Génial, les démonstrations sont précises et claires!
Hello Chistopher,
I enjoyed your video, thank you for sharing.
Looking forward to the next video!
Hello Everything works ok when powered from 230 V mains but with the power of the battery (robot controlled remotely via wifi). I had to change the pin 7 to 12. Pin 7 ( power from baterii) gives then still 3.3V. Raspberry B+.
Grest work guy, you are the best😀
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.
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: czcams.com/video/xHDT4CwjUQE/video.html
@@ExplainingComputers Ah, thanks. I did miss that one. I shall go take a look.
Very nice video.
je ne comprends pas l'anglais mais ses vidéos parle d'elle même!
Wao sir you're awesome at what you do.. Subscribed and waiting for next videos
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
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.
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
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.
A very professional and informative vid. We appreciate your instruction and effort. Keep up the great work.
I tried rebuilding it and powered the L298N with a nine-volt battery. After some seconds the motor's speeds tremendously decreased and the battery got pretty warm (not hot). What is the problem here and how do I fix it?
thanks you for all
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.
Fun build
Wow Thank you so much! Amazing presentation.
using this method of drawing a shapes with straight edges. How could I extend it to make my Raspberry pi go round in a circle of given radius "x"or any other curved shapes such as a rose "r = (a)sin(bx)" (Polar Coordinates)?
thank you for making this video.
I missed connecting pin 6 to the h-bridge. My second attempt should work
Wow what a brilliant video. Thanks for explaining
You soldering could come in contact with the motor housings and short circuit
As soon as i connected motor controller with battery, the motor starts running. Why?
Using same components from vidoe with same setup of wiring just I am using 9v battery.
This will be because you have yet to execute any code -- the GPIO pins will be in a random state until you have executed the code to set up the pins, and so pull them down to an "off" state. You need to execute the code, then connect the power to the motor controller. If the Pi's own power is not turned on, this is due to the setting of a 5V enable jumper on your L298N -- see the "Important Note" on my page here: www.explainingcomputers.com/rasp_pi_robotics.html Or, see the videos and wiring on this page (based on the same setup): www.explainingcomputers.com/pi_devastator_videos.html
@@ExplainingComputers
Really happy to see your fast response.. And thank you for your instant help.. 😍😍
"Are they earrings? " Haha!
hi there, i tried this but with a different controller board (with no 5v enable) and firstly when i try to run the python script it says an error due to the gpio's then as i am powering the RPi with a usb, then the modules with an external battery, i connect ONLY the ground to the gpio's and not the VCC (as there is no 5v enable) and when i do this even if the +5v VCC is OFF the module faintly emits light as if the ground pin is powering it? any help please. thanks
Regards,
Aran
What if we want to drive the motors slower, like with PWM?
I cover PWM motor control in this video: czcams.com/video/H1PIzxNdGGk/video.html
You are the best
happy new year
So how exactly do we connect the ENa and ENb pins if the two jumpers aren't there? I have just connected them to pins on the Pi. How should I code them if I did this?
Could you make an example code in python 3.4.2 where you control leds by pressing keys on the keyboard? An example would you press a on the keyboard and a led turns on. You let go of the key and it turns off.
Amazing! I need to order these parts... :D Really inspired by your video.
I tried building this exact thing. The first program works fine. When I try to run the second program my other motor doesn't run. Can you suggest why might this happen?
Why don't you use PWM on the L298N's Enable pins to controll the motors speed?
please could you tell me which moters to buy are they 2 x Micro Metal Gearmotor (Extended back shaft) - 298:1 from pimoroni
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.
Great video, waiting for your followups!
Fairly soon now . . . :)
from where could i find the code ?
+ExplainingComputers that's great to hear
Thanks it worked,but can you do a tutorial "how to control it with a phone or something" ?
+bassel sak Yes, turning this into an independent robot controlled remotely via various means is on my video list for January/February 2016. :)
+ExplainingComputers Nice to see you responding to comments! I'm a big fan!
@ExplainingComputers are the #2-56 screws and nuts supplied with the chassis the same size as M2 in the uk? Thanks for any help.
hi, i wanna ask if raspberry pi can get input from its camera? bcoz i wanna make a simple robotics with raspberry pi that can be control using hand gesture recognition.
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
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.
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.
I tried to implement the project using an external power supply instead of the battery. L298N comes on but raspberry no. The power supply delivers 9V max 1.2A. Is it a problem of amps?
Possibly, depending on what Pi you are using. Also, you will need to set the jumper to get 5V for your Pi via the L298N -- I power this setup via batteries (6xAA) in this video: czcams.com/video/DyQxvfwQbTg/video.html
Why do I get this error? type error:"str" object cannon be interpreted as an integer
Because the inputs (sides and size) the user enters in the shell after running the code are strings. For the code to use the user's inputs to do the math, the user's inputs need to be converted to appropriate data types. Specifically, int (integer) for "sides" and float (float) for "size". This can be accomplished easily by changing the lines in the code to
sides = int(input("How many sides?"))
size = float(input("How big?"))
Hope this helps!!
Well explained. Good job.
amazing series. Thank you. please do more!
Yes, please do another video about inputs through the raspberry pi, then how to make it do an output off of the input!
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. :)