![Mark Johnston](/img/default-banner.jpg)
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Mark Johnston
United States
Приєднався 28 сер 2014
I make educational videos on STEM Education topics. Check out my site www.mjstem.com. Email me at mark@mjstem.com
My Virtual Robot Drew a QR Code!
Website - www.mjstem.com
Email - mark@mjstem.com
Twitter - JohnstonMarkA
TikTok - tiktok.com/@johnstonmarka
FB group - groups/vexcode
Discord Server - discord.gg/RcZAbbM
Join this channel to get access to perks:
ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
Email - mark@mjstem.com
Twitter - JohnstonMarkA
TikTok - tiktok.com/@johnstonmarka
FB group - groups/vexcode
Discord Server - discord.gg/RcZAbbM
Join this channel to get access to perks:
ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
Переглядів: 294
Відео
VRC Virtual Skills: A sneak peak of what's to come in 2022/23
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Website - www.mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
VEX IQ Slapshot Virtual Skills (Teaser)
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Website - www.mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
This VEX Catapult Bot is SO Fun!
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EXP Catapult bot build time lapse. Instructions here - www.vexrobotics.com/exp/downloads/build-instructions Website - www.mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
Want to use Mecanum wheels or XDrive?!? Watch this!
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In this tutorial, I take you step-by-step on how to program your drive controls for an x-drive OR Mecanum wheels in VEXcode Blocks. Here are some great resources to use: Holonomic X-Drive Tutorial from Stephen Mylabathula - ua-cam.com/video/KIkDvYGDCEs/v-deo.html VEX KB for Creating a V5 Drivetrain - kb.vex.com/hc/en-us/articles/360035952771-Creating-a-V5-Drivetrain Website - www.mjstem.com Ema...
How to Print a Vector Image on the VEX IQ 2nd Generation Brain
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In this step-by-step tutorial, I will show you how to convert a vector image into a list of coordinates. Then you can print pixels at those coordinates to make the image show on the screen! Link to the image I used in the video - pixabay.com/vectors/snake-animal-line-art-serpent-6158325/ Link to the tool I used to create the coordinates - spotify.github.io/coordinator/ Link to my spreadsheet wh...
VEX IQ 2nd Gen Education Kit - The Next Level in STEM Learning
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A walk through the parts of the NEW VEX IQ 2nd Generation Education Kit! Links below... Education Kit - www.vexrobotics.com/228-8899.html Kit of Parts - content.vexrobotics.com/vexiq/pdf/228-7755-750-Rev1.5.pdf Build instructions - www.vexrobotics.com/iq/downloads/build-instructions Compare the 1st and 2nd generations of VEX - www.vexrobotics.com/iq/products/iq-faq Website - www.mjstem.com Twit...
HEXBUG VEX Robotics Gear Racer
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Get the Gear Racer here - www.hexbug.com/hexbug-vex-robotics-single-gear-racer.html (not an affiliate link). Website - www.mjstem.com Email - mark@mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Discord Server - discord.gg/RcZAbbM Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
VEXcode for VEX 123!
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A brief introduction to VEXcode for VEX 123. Website - www.mjstem.com Email - mark@mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Discord Server - discord.gg/RcZAbbM Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU3daQ.htmljoin
I ATTACHED A VEX VISION SENSOR TO A BOT AND MADE IT FOLLOW A CUBE!
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I attached a VEX Vision Sensor to an Armbot IQ and made it follow a cube! Armbot IQ Build - link.vex.com/vexiq/pdf/228-4444-751-Armbot-IQ-Build-Instructions Website - www.mjstem.com Email - mark@mjstem.com Twitter - JohnstonMarkA FB group - groups/vexcode Discord Server - discord.gg/RcZAbbM Join this channel to get access to perks: ua-cam.com/channels/9sGdJEf7tMzEl52OYU...
VEX IQ VR SKILLS - Pitching In (Teaser)
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VEX IQ VR SKILLS - Pitching In (Teaser)
VEX VRC Tipping Point Online Skills (Teaser)
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VEX VRC Tipping Point Online Skills (Teaser)
Line Detector Part 4 (Color Counting LEVEL 3)
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Line Detector Part 4 (Color Counting LEVEL 3)
Line Detector Part 3 (Color Counting Levels 1&2)
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Line Detector Part 3 (Color Counting Levels 1&2)
Line Detector Part 2 (Counting Lines Level 2)
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Line Detector Part 2 (Counting Lines Level 2)
great video, thank you
Nice video
Codigo ??? Ya hechi para copiar
"a thousand dollars I believe which is actually a really good price when you look at it" - Mark Alan Johnston
for someone who spent about a month studying everything electronics and how to manage to get optimized performance with efficient material use for hours a day, I absolutely agree with handing ready to use plug and play components that are used on robots, as it takes a long time for a person who has no hardware experience to learn even how to properly select the proper items to use.
But absolutely it doesn't justify the huge sum of money, I prefer learning than just spending a whole month and half worth of family groceries on materials that I've also to think over to make something of.
skibidi rizz bro
que guapo te ves
Awe shucks... thank you.
tysm broo u are the best
Can you please post the vex code? Can you make an interactive video for GPS installation and programming?
That's a great idea! Unfortunately, I doubt I will be able to do this anytime soon. Have you tried the example code that you can find in vexCode?
Thank you so much for this video🫶
You're so welcome!
Muchas gracias!!, me sirvió para poder hacer mi primer diseño 3D
Why in my monitor the num_black_lines is different number instead of 5 only
I'm sorry to hear you're having trouble. What is your screen showing?
I am a teacher and we have a project in school that we must implement using vex exp robots. The robot must solve a problem we face. Can you help me with ideas? I want to make my students win because they are very excited.
I'm happy to help. I would start by asking the kids what everyday problems they would like to try to solve! The project will be much more exciting for them if it's personal. Make sure you clearly define the project constraints and that the fully understand them... then make sure they feel comfortable sharing "dumb" ideas because they may actually be great ideas, or spark other ideas.
It's good but the problem is that it keeps on spinning and I think it is because it doesn't detect an object yet. And when it does, it slowly nudges towards one. How to fix?
Try adjusting the values. It's kind of an old video. Think I should record a new one?
17:58 i cant get the formula to work for my set of coordinates could you reach out to me and il send you the sheet so you could help me because i cant get it to work
Sorry for the late reply. I'm not sure I will have time but you can email me mark@mjstem.com and I will take a look.
You need to pin the "scale" conversion of your items please. 2x4 2x8 plywood and so on. Totally lost me :(
Where did I lose you exactly? It’s an OLD video so I don’t have the info readily available but I’ll try to help you as much as possible. I am pretty sure I used 1mm = 1inch and I did it all In nominal sizes so a 2x4 was actually measuring 2x4.
Block code available anywhere?
What are you asking?
Was asking for the programming code, but it’s ok we got it.
@@davjaramillo Can you help me with the code?
For the "anuglar" beam 1X12 are we to "bend" a 1X12 into the angle beam: steps .67-68
Sorry. It’s been so long ago, I don’t remember.
Yes
thanks! 2:24 why is the lid of the racer up? does that make it go faster?
It's a lever that's being pulled on my the rubber band... that's what makes it go! ;)
Hey Mark! Thank you so much for your video. I really need this to start my robotics assignment. need more videos to learn from you.
i got 80.5 kg)
How do i stop the robot at the end
You could have it "end project" when the down eye sees red.
Thanks so much
You're welcome!
Hahaha
What more or less things can the buttons be used for?
Autonomous selection/other functions
Pretty much whatever you want! For VRC, you might have multiple auton's based on position or you may want to be able to select a different strat at the field just before the match.
@@MarkJohnston may I suggest you make a video on box point collision boxes? I made a cool vex library that allows for buttons anywhere any size. I think the repo was called v5 buttons
Interesting. Can you email me more info and I will consider it. Mark@mjstem.com
bad apple.
?
make bad apple on a vex brain @@MarkJohnston please
Hello I have a vex123 and one of my students damaged the robot, it was forced and the motor inside of one wheel broken, what I can do ? Please help, hoy could change that motor ? Where could I buy it?
Have you contacted VEX? They may be able to assist you. I have not opened up one of the 123 bots. Electronics repair is not a strength of mine so I wouldn't presume to know how it could be fixed. Sorry.
Hello I have a vex123 and one of my students damaged the robot, it was forced and the motor inside of one wheel broken, what I can do ? Please help, hoy could change that motor ? Where could I buy it?
Have you contacted VEX? They may be able to assist you. I have not opened up one of the 123 bots. Electronics repair is not a strength of mine so I wouldn't presume to know how it could be fixed. Sorry.
Honestly super good tutorial only one problem my robotics teacher makes is use c++if you could create a tutorial for that it would be amazing I want to use the sensor face a AI autonomous for over under this video proved the point that it’s possible but it will be hard to do
I’m really not that well-versed in C++, but I could probably do it. Have you tried just building it out in blocks and then click the code button and see what it looks like? If you understand the basics of C++, then that should give you a good start. It will probably need to be cleaned up quite a bit though.
@@MarkJohnston oh I didn’t know you could make block code into c++i will try this on Monday but I’m not very good at coding but I have a good understanding on block coding
yeah, build the code then click the icon with < > and it will show you the C++ code :)
@@TACOMAN2355 Maybe save it to google drive or something?
Thanks for the lesson!
My pleasure!
hi, can you hellp me?
as you can see, I am not very active here recently... sorry. You can try emailing me and I will answer if I have time. mark@mjstem.com
Bro thank you I just started robotics I can’t believe you made a dummy like me to understand 🧌
I am sure you are not a dummy! I am glad I could help!
Aww where am i at?
Lol
LOL
Do you think is it necessary to buy the vex go field?
Necessary, no. If you have the budget, I would get it. If you’re creative, you can create your own!
Whats cracka-lacking my G? Also great job on the vid
Very interesting explanation
I hope that means you found it helpful. Some of my videos are getting old and need updating. Let me know if you have any ideas for new stuff. :)
It’s really helpful. Thanks.
Awesome Explanation Sir, Can you please provide the source code of this task so we can download it? Thank You Sir
I would, if I had it. Sorry.
@@MarkJohnston do you think you could provide some of the code for the goto function so that i dont have to manually copy-paste it
nice
does this work in c++
It should.
Awesome!!! We had so much fun this year at worlds!!!
Hi there! I'm a robotics teacher from Charleston WV. Thanks for the video!
Firest
i added the wait time to 155 and got 117 kg
bro is so cool
This is a person that you met at a robotics tournament in Galveston during 2022; We got 3rd 🥉 😅
Very cool. How have you been?
Been good! Ready for the next one.
Hello sir how are you I am a disigen of
Hello sir how are you I am a desigen of floor plans