Make the TINIEST Line Follower Robot without a Microcontroller!

[@saitamatechno]

I like the introduction, you can make this robot very affordable if you have 1 broken computer, 1 remote tv controller, 2 broken mobile phone.

[@MiltonCedeno-l5x]

The infrared leds, the batteries and the boxes you can get them easily on any electronic shop and are cheap. And there is no need to make it that small. But yeah he is a douchebag, but I can skip that in account of the interesting project he shared.

[@userxxdy123]

Can you suggest me how to make a repeated vehicle that on py pressing button and hit with wall and come back with itself to it's original position. Without any sensor or controlling devices

[@Aaronsuper1]

"Can you tell me how to avoid walking into walls? I have no eyes, no ears, no sense of touch or motion" 😂

[@mateoarteaga8274]

2 broken tv remotes

[@mateoarteaga8274]

And a shirt

[@AKElectroDIY]

I participated in a Line Follower Competition held at university level among the college students. Got 3rd position there. All the participants who made this type of robot(this technique is called bang-bang) were eliminated in the first round or so. The only participants who could qualify for the semi finals made the pid line follower. Ours was pid too. But for this kind of robot, it requires a lot of precise calibration. It would be really good if you also try making an advance pid line follower that can be a competition winner.

[@evanbarnes9984]

You can also do analog implementations of PID, it's just harder than doing it through a microcontroller

[@MaxImagination]

Thanks for sharing that. Really cool! If I see a good fit for a KZbin video, I may try making a competitive line follower robot with Arduino. Cheers.

[@Hexscit]

this is actually impressive ngl, nice job

[@MaxImagination]

I appreciate that!

[@TheMidnightmovies]

ahh!, I thought you were gonna lie about it for a moment!

[@pizzainc.1465]

This shows the difference between animals and plants or cells. Animals have brains, so they are like robots with microprocessors, but cells and plants don’t, so they are like this, using complex mechanisms to do somewhat simple tasks without thinking.

[@MaxImagination]

Well explained!

[@eternity0..]

Both the minds and the cells of animals and plants use electrons and so dose this videos “line follower”

[@K17KFi7]

Nice project! I did a similar design last year, using two high brightness white LEDs for illumination, two yellow LEDs paired with an BC547 amplifying stage for each one for reflection detection (using the yellow LEDs as photocells), two BD135 with 1N4004 flyback diodes for driving the bigger motors and an LM339 for the comparator. I find remarkable that such a simple bang-bang controller can follow lines so well. But, I have to say that I've got VERY worried in seeing solder being filed. Most probably you are producing a lot of highly lead contaminated dust, because most popular solder alloys generally have 60% tin and 40% lead, or 63% tin and 37% lead. Not only it is very easy to breathe in some of that dust but, as well, this fine dust has quite an ability to stick to the skin of your hands, and stay there even after some washing. Play safe! Don't fool around with solder dust.

[@MaxImagination]

Thanks for your comment! Seems like there are many simple line follower robots of different kinds out there as such, cool! I see you got a point there with the solder dust, I will try not to touch it next time. Thanks for the tip. I've also already invested in a solder fume extractor to use every time I'm working on a circuit. I highly recommend it.

[@Jlabs-official]

As a maker new to robotics these tutorials are amazing, I would love to see more! keep on creating banger videos!

[@MaxImagination]

Glad you like them! Thanks a lot! 😊

[@1988trevor]

Using the pen tip of a ballpen is a genius idea. This hardware tutorial is amazing for the budding engineer

[@MaxImagination]

I'm glad you found it helpful! Thank you!

[@akshitsoni9361]

Hey Buddy! Honestly, LOVED IT! please make more of such kinds, would love to see them! go on with the series, all support! All the very best! 🌹

[@MaxImagination]

Thank you for your kind and supportive comment! Will think of making more 😁

[@MCsCreations]

Brilliant work, Max! It works great! 😃 Stay safe there with your family! 🖖😊

[@MaxImagination]

Thank you, MC! 😁

[@El_IrregularDX]

Super complex, but GENIUS DESIGN!

[@MaxImagination]

Glad you like it! Thanks!

[@GrandadsOtherChannel]

Excellent video, Max 👍😁

[@MaxImagination]

I appreciate that, James! Have a great week ahead 😎

[@ironoreiron]

10:47 YES, PLEASE DO MAKE A SERIES

[@MaxImagination]

Will consider it, cheers!

[@Abd_AlGany]

I'm Iraqi and I love this content . Thank you 👍

[@MaxImagination]

Glad you enjoy it. Thanks for watching!

[@Abd_AlGany]

I made the circuit in the video, it's amazing 🤩@@MaxImagination

[@MaxImagination]

That's great to hear! Great job 🙂

[@DanangAlta]

SMOOTH, no BS and easy to understand. Wow, this is soo cool

[@MaxImagination]

Glad you enjoyed the video! Cheers.

[@louisanapereira1854]

Really simplest design .. good for newcomers & beginners.. getting into it.. Here are some few points that you may consider in future attempts... The single led & ldr.., one for each side and the comparator mode of operation.. permits only a TWO LEVEL(binary/2 bit) control. With 2 per side , and the second pair , placed behind (or front) and slightly left/ (or right) of the first , will give a narrower band( configured like a hysteresis window) for each wheel.. Now you can get a minimum 4 bit logic resolution.. With additional combinational & sequential logic.. more permutation/ combinations properly worked out , can make it a more robust controller.. bear in mind this is just a " look down" decision controller.., and not a " look ahead" one.. In both cases.. the detect sensors & driven wheels are at extreme opposite ends .. Best would be to have idler wheels (turning L/R) controlled by this and rear wheels drive by some other circuit . Happy Tracking.. 😅

[@MaxImagination]

Hi there. Thanks for your comment and tips!

[@BuildCreation]

The Cutest mini Bot! 🤏

[@MaxImagination]

Thank you, buddy!

[@vallepukumar6564]

Great work max! You are going pro on tiny circuits😎 The sound effects are cool and with extreme editing skills 👏 Really appreciated your efforts, Waiting for 100k subs 🎉

[@MaxImagination]

Thank you so much, Kumar! I appreciate you noticing the details of my video 😊

[@asghiasughiqughbqwg]

Brother you are the greatest youtuber alive. I love this channel.

[@MaxImagination]

Thank you! I appreciate that. :) Making these videos takes a lot of energy and time, so If you’d like to support, here’s my BuyMeACoffee link: buymeacoffee.com/MaxImagination. Cheers!

[@saadsabir6526]

Really enjoyed your video and useful links in the description. Bieng a mechtronics engineer, I learned from it how to make line follower robot without a proper kit. I also find very useful knowlwdge in your projects in your short instagram reels as well.

[@MaxImagination]

I appreciate your kind comment! Glad you find my videos helpful :)

[@_ANSUMANPATI]

Nice video! I am very interested in DIY projects that are very small and can fit in the palm! I would really appreciate more of these types of tiny-sized projects!

[@MaxImagination]

I appreciate that! Will work on more as such. Cheers.

[@yousefLa52.]

Perfect electronic work ❤👏👏👏

[@MaxImagination]

Glad you like it! Thanks

[@richellebardeskar6951]

Great project!! The bot detects the difference between light and dark and correspondingly activates the motors but if both ldr are on white / black how does the opamp compare and subsequently send the logic to run both motors?

[@MaxImagination]

Thanks! If both sensors receive the same amount of light, the opamp makes the robot veer at random until it rolls over a contrasting color surface to continue differentiating.

[@shreyass409]

How to connect all the components and solter it…like which component is connected to which …!!

[@MaxImagination]

Follow the diagram and real-life wiring reference image.

[@Mr.GeniusCreation]

Wonderful Project Max!! 😃 I just made a Line follower to get me snacks from kitchen 😁😜

[@MaxImagination]

Thank you, Sahil! Haha, our robots should have a race! 😉

[@gowthamsdiy321]

This guy is so under rated

[@4DRC_]

The intro was actually a very nice use of AI, that was a cool animation.

[@MaxImagination]

Glad you liked it! Thanks 😊

[@omarahmed-ez6ve]

Great work🎉🎉 I will DO this project now❤❤❤

[@MaxImagination]

Thanks! Have fun!

[@AdwaithK-p8e]

bro , you are THE BEST of innovators out there , really like your way of presentation and content delivered , i have already subscribed and i will suggest your channel to all my enthusiast friends .

[@MaxImagination]

I really appreciate you taking the time to leave this comment, that means a lot!

[@OneLabToRuleThemAll]

That is one cute little robot there! Once I get some op-amps i'll definitely build one of my own!

[@MaxImagination]

Thank you for your comment. Have fun making it!

[@ashuzon]

I love it. Please make more videos on how to recycle use old junk to make simple robots.

[@MaxImagination]

Will keep that in mind!

[@MegaTechno]

I am really impressed that you did this without a microcontroller. Thanks

[@MaxImagination]

Glad you liked it! Cheers.

[@HelamanGile]

Saw a kit for this on AliExpress for $1.60 so was wondering how well it would work looks like they took your design

[@MaxImagination]

I actually took inspiration from one of those robots back in time, but made mine a lot smaller and more agile.

[@WorldRobotNews]

It would be good to see more robot videos

[@markhaus]

If your micro supports it you could also use a pwm generator and capacitor to smooth the output to lower the average voltage by changing duty cycle

[@MaxImagination]

There is no microcontroller used here...

[@MegaTechno]

I like that you reply to every comment!

[@MaxImagination]

You're welcome :)

[@JustAnotherAlchemist]

You can lower the gear ratio by using smaller rounded tires, you just may have to angle to motors to get them to touch the ground. Furthermore, you can adjust the steering effectiveness by making the front caster farther forward or backwards, and/or by bringing the wheels closer together or spreading them farther apart. To get max voltage drop to the motors, don't use Schottky diodes, but rather normal silicon diodes. Most Schottky diodes only drop ~0.3 volts. Normal silicon diodes drop ~0.65 V. You can also just use resistors if you observe ohms law. (same thing really.) Li-Po batteries can catch fire pretty easy. Recommend against their use if possible. At that size, it would be like a few books of matches going all at once. Still enough to burn you, or burn your house down. CdS photo cells are most sensitive to green light, right around 555nm. Use of a green LED and light absorber that takes green up best for your lines would be ideal. They make smaller dual comparator IC's. A reasonable substitute would be a dual op-amp IC.

[@MaxImagination]

Thanks for your tips, this is really useful to know. Will take note of that!

[@_sandits]

you did a great job on this max! the circuit and soldering was really clean and neat as it so tiny. keep it up 🙌❤

[@MaxImagination]

Thank you! Cheers!

[@ElAuladelParcero-qk7ss]

Excelente amigo sigue así .... felicito

[@MaxImagination]

Gracias!

[@rakshitcraftsandcreations]

Amazing as usual

[@MaxImagination]

Thanks again!

[@ZeeOperator-fc1wl]

This is some impressive soldering...

[@60pluscrazy]

Good one 🎉

[@yamilh1509]

Thank you very much, I am just studying Operational Amplifiers, I will do it and understand more about the component. you're great!!

[@MaxImagination]

Glad to hear that! Happy making!

[@PeetHobby]

Nice video! A line follower is a fun starter project. 👍 Adding a couple of flyback diodes to protect the transistor might be good for the long-term operation of the circuit. While the motors are small, it's always good to take precautions to prevent any potential damage to the transistors.

[@MaxImagination]

Thanks for watching! Good point. Well, I have updated the circuit diagram with the flyback diodes and other changes. Cheers.

[@siriusleto3758]

The same robot without regard to size would be interesting. A version like more common toy motors and perhaps using batteries.

[@conorstewart2214]

Its a clear and well made video, the only criticism I have is that you say "PCB board" instead of perf board.

[@MaxImagination]

Thanks for your feedback. Will improve on that verbal mistake next time I talk about perf boards.

[@Nuclearsmoke]

Хорошая работа друг 😊

[@MaxImagination]

Thanks!

[@ali.k3846]

Masterful explanation 🇲🇺🇲🇺

[@MaxImagination]

I appreciate that!

[@nobocks]

Simple question : Is it possible to make an invisible line with like some special pen and a special led ? Currently working on a huge racing circuit and i want so hard to add trafic without killing my budget.

[@MaxImagination]

Unless you're willing to change the photoresistors for magnetic reed switches, no. This isn't possible with the current robot setup due to the fact it needs to detect dark/light contrasting edges.

[@nobocks]

@@MaxImagination So let's say i use invisible magnetic paint and hall sensors on the device, it's possible ? Because a simple HO autonomous car is arround 150$ and it's pretty expensive.

[@analoghardwaretops3976]

Nice quick & simple basic tracker built & functional..... Its a simple dual " bang- bang" controller.... IMHO there are some minor improvements / circuit changes that could better its preformance.. 1) The single cable tie (clamper) on each motor cannot prevent motor pivoting during bang on / bang off....atleast use two ties..spaced further apart... 2) The LDR's should be moved closer to center of axis....it will reduce the off tracking error correction span. 3) Each LDR/& respective led must be gated/pulsed alternately to avoid each others light interfering on other sensor.....this means more electronics/ logic ckt.additions....😢 4) LDR axis & motors shaft axis..must be parallel to each other..... 5) try to obtain/make really well centered wheels.... 6) Wheels must be equidistant from pcb longitudinal axis centre.. 7) Wheels fitted with slightly tapered width..,with the smaller diameter on the outside ..will allow for natural correction to move in a straightline without " drifting " left or right on its own....... These are some mech. insghts I could offer..😅..wish you for best next attempt.

[@MaxImagination]

Thanks for your tips! I will take note of that for potential future upgrades to this robot. Cheers.

[@AKElectroDIY]

Wow its so good. I might also make one

[@MaxImagination]

Glad you like it! Cheers.

[@keerthiskumar2762]

Is it suitable for me also for 22 yr?

[@MaxImagination]

Yes, why not!

[@Prateek1234q.]

These type of videos are great👍 I subbed ❤

[@MaxImagination]

Awesome, thank you!

[@houdeifaadjimi101]

Can i make with bigger motors without changing the driver circuit

[@MaxImagination]

Sure, you can!

[@houdeifaadjimi101]

@@MaxImagination thank you so much

[@bananabuilder2248]

Great job! Please have more videos about pcb robots!

[@MaxImagination]

Thank you! Will do!

[@tanojimo]

I like how he made this with easy to find tools

[@MaxImagination]

Glad you liked it!

[@OldAndyFitia]

The video quality has improved a lot. Honestly, I haven’t seen this channel for years 🥹

[@BizzareClip]

very good

[@IdeasbySuyashDesai]

Awesome!!!! Apply for world record

[@MaxImagination]

Thank you! Would be fun to try 😁

[@hiloluwu]

is there any video or website that would let me understand the circuitry in this

[@MaxImagination]

Sure, learn more about the circuitry behind it described here: www.elektormagazine.com/labs/make-the-tiniest-line-follower-robot-without-a-microcontroller-1

[@mamatelashvili-mate_]

Nice bro...i have some of these components and iwant to try too...

[@MaxImagination]

Great, I'm sure you can make it too. Best of luck! 👍🏻

[@jonujangid3J]

This was really awesome tiny robot ( tiny 🐜 )

[@MaxImagination]

Thanks, Jonu!

[@shakhaweathossanazad2041]

I think that we ca use parts from a mouse to make the same thing with a little modification

[@andrejrac1319]

yeaa 100k,congralutions

[@MaxImagination]

Thanks for your support!

[@andrejrac1319]

@@MaxImagination will there be any special

[@xedyscreativemind5868]

Yoo max, I love you're work, and you know what, you gave me a idea to make many of them and make a racing track so that following robot is going to follows the track and do something race, *sorry for my grammar*

[@MaxImagination]

Hey! I appreciate your comment! That would be so cool 👍

[@say_talha]

more mini stuff like this🙏

[@MaxImagination]

Will do!

[@eltrcty404gg4]

Can you make a detailed video explaining the schematic you shared ? basically the circuit design procedure.

[@MaxImagination]

No. However you may check the updated diagram in the video description that is accurate to the circuit my robot works with.

[@matthiasrohrer6913]

es ist wunderschön !

[@MaxImagination]

Danke!

[@YourArkaShines]

Sorry for being late! Great project

[@MaxImagination]

Late? Thanks for your comment.

[@RoboArc]

This is fun 🙃 I like this

[@MaxImagination]

Glad you think so! Thanks for watching

[@Jackson_Zheng]

I reckon you can simplify it down even further to just a single Op-Amp if you have it continuously running and have the op-amp push down a pin into the ground that allows the robot to turn around it to the left. Then when the pin is up, the robot will naturally swerve to the right. That way, the single op amp can be used as a switch.

[@MaxImagination]

May work, but not with higher current devices like the motors.

[@santiagoaguilera7289]

MINDBLOWING!!!

[@Kai-Made]

Hey, this is great. My 11 year old is in the works of making something like this. One note or question though. You say 51ohm resistor but it looks like you are using 47ohm instead...how important is it for it to be 51ohm? Just curious. Thanks.

[@Kai-Made]

following the schematic is difficult lol. It has things that you do not mention but we think we got it working...using a little trial and error. The big trick is to dial in the speed of these little drone motors...we could not get the weight off the cell phone motors with out breaking the shaft. If we create this thing we will probably create a little more detailed schematic, if we do we will either send it your way via your elktor links or tag you in a post with it attached. Thanks man, this is a great little project!

[@analoghardwaretops3976]

​@@Kai-Madeboth motors are independently switched "full on" or "full off" by their respective LDR/comparator ckt. the ldr placements& comparator thresholds decide the on/off for motor (L or R side) to do correction when it veers off track/line.. When energised they are always at max.speed... therefore it tends to "runaway" sometimes....

[@MaxImagination]

Hey! 47 and 51 ohm resistors are just about the same. It makes no difference in the circuit. Also, please check the updated circuit diagram in the video description. Cheers.

[@IamGustavooo]

Can I replace the lipo battery for the battery holder for 3V button cells?

[@MaxImagination]

Yes you can, but don't expect as much power from the robot.

[@Doitcreative]

Very... Well max 😅that's your.... Outstanding creativity on making everything tiny... 🤏

[@MaxImagination]

Thank you 😀

[@sumeetadsul5014]

His Soldering skills are good

[@MaxImagination]

I appreciate that!

[@kreatifhandmade]

Thanks i Will try it❤

[@joshuaaranguren1020]

That's pretty cool!! 😁🙌🏽🏎️

[@MaxImagination]

Thanks, Joshua! Have a nice week ahead!

[@joshuaaranguren1020]

@@MaxImagination no problem!! Same too you as well!! 🙌🏽

[@hish2311]

Nice job smart.

[@MaxImagination]

Thanks!

[@wolpumba4099]

**Abstract** This video tutorial teaches you how to construct a miniature line-following robot that doesn't require a microcontroller or Arduino. The robot is remarkably small and can track lines of various widths at high speeds. Here's what you'll learn in the video: * **Components:** Most parts are commonly available, including motors from old Nokia phones, a comparator circuit salvaged from power inverters, and buttons for wheels. You can also purchase the components from provided affiliate links. * **Construction:** The robot is built on a small perforated PCB board. Detailed instructions cover component placement, soldering, battery connection, and making the front caster wheel. * **Circuitry:** The robot uses an LM 358 comparator for decision-making, LEDs, resistors, transistors, and other electronic components. The video includes a circuit diagram, assembly explanation, and tips. * **Charging and Enhancements:** The tutorial suggests using a rechargeable lithium polymer battery and covers adding heat shrink wrap to the wheels for better grip and shockey diodes for voltage adjustment. * **How it Works:** The robot uses light-dependent resistors to detect the difference between light and dark surfaces. A feedback loop corrects the robot to stay on track by controlling motors accordingly. * **Troubleshooting and Limitations:** If the robot struggles to stay on track, the tutorial suggests using geared motors and adjusting voltage through diodes. * **Educational Content:** This project is ideal for hands-on learning. The maker also promotes a subscription service (Circuit Mess) that offers educational electronics kits. disclaimer: i used gemini advanced 1.0

[@cyb3ristic]

loved this video but would’ve appreciated a bit of explaining for what the components are doing

[@MaxImagination]

Sure, you can learn about how they function to make the robot work here: www.elektormagazine.com/labs/make-the-tiniest-line-follower-robot-without-a-microcontroller-1

[@JohannesHumper]

Nice bro

[@shashikantsingh6555]

Subscribing to your channel is the best decision of my life

[@MaxImagination]

Your comment made my day. Thank you! 🤩

[@shashikantsingh6555]

Yay!!

[@ahmednoor7811]

1 90 degree turn and it oes of track. wonder if i can add more of those sensor thingies.

[@MaxImagination]

Perhaps adding multiple photoresistors in a parallel array outwards like most of those competitive line followers would do the trick.

[@johnconnor3246]

Reminded me of our university days, 18 years ago.

[@franklydude]

I know most simple circuits use two photo sensors, but since you are just following an "edge" (blacl/white edge,) you don't need two photo detectors.

[@MaxImagination]

I see how you may be right, but with 2 sensors, it's more likely to stay on the line and not veer off.

[@eksperimenpemula]

I like it ❤😂

[@haytamrf3166]

Amazing vid

[@MaxImagination]

Glad you enjoyed it. Thanks!

[@josh_is_cool7]

Is there a specific way you solder the parts in or do you just bend it and put it anywhere sorry I’m new to this stuff

[@MaxImagination]

Hi. Yes, each component is connected in a certain way to complete a working circuit. I suggest you study electronics engineering to learn more.

[@josh_is_cool7]

@@MaxImagination thanks

[@MaxImagination]

No problem:) I suggest starting with learning electronics first as it will give you the foundation. Then, move onto learning Arduino and it's programming. Read the book: Practical Electronics for Inventors Watch channels such as "All About Electronics", "GreatScott", and "EEVBlog".

[@KralentDX]

thats about 1 dollar

[@Pockeywn]

[@SizzlingDimple]

Components required and it's number?

[@MaxImagination]

See the list in the video description.

[@Heliomation]

Woahwy that's crazy cool ^^

[@MaxImagination]

Thanks for watching!

[@analoghardwaretops3976]

I would like to add here.... With line detectors placed in the same axis as the front steering wheels (an additional pair here) {just as steering wheels are in present day multi- wheel system's} ,is really ideal... Also if the steering control is tweaked to output a behaviour as in "ACKERMANN STEERING SYSTEM's" or improvements in that..,then you have really nailed it. F.Y.I. ..ACKERMANN STEERING is the basis for all multi- axle vehicles..where the circle insribed by the turn of inner & outer wheels have the same center of their radaii & is always the midpont of the of the rear axis rear wheel dive pair.

[@MaxImagination]

Thanks for your tip. Ackermann Steering could work well if this robot were made into a robot car and had further technical adjustments made to improve its tracking abilities. Cheers!

[@Sultanmahamud-vs6hi]

very good

[@MaxImagination]

Thank you! Cheers!

[@paulmeynell8866]

So am I right in thinking only one motor can be on ate once? The comparators look to be connected so one is on and the other is off? The same for the motors they are driving? I did a circuit at school many years ago , both motors were on and you stopped a motor to cause it to turn. Here it looks like it wiggles?

[@MaxImagination]

Correct! One is on at a time when moving forward and tracking the line.

[@lavanyacvlavu7572]

Please give circuit diagram

[@MaxImagination]

Linked in the description!

[@aadarshhogtapur1865]

Can you make a tiny maze solver like this if yes what sensors you will use

[@MaxImagination]

Possibly, but I do not promise anything. Another viewer recently mentioned that adding more LRD sensors out to the sides in parallel would allow this robot to continue following lines and staying on track at a high speed.

[@DevAhmadDiab]

Awesome!

[@MaxImagination]

Thank you! Cheers!

[@yashgala1669]

One suggestion sir, Will you create a mini maglev train model ??

[@MaxImagination]

Hey! I was thinking of doing it!

[@aafhanjaved1859]

Man vs wild ❌ Man vs electronics ✅