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Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

CMS 1932 10
This content has been translated flag-pl » flag-en View the original version here.
  • I am again, my beloved readers. And this is thanks to quite a large package that I recently received from Kamil. But about this, you could read in a separate subject

    This time I will present you a toy that I was very skeptical about. Because who and why would buy it and admire this "invention"? However, after I put it together and started it, I started laughing like a child. Immediately afterwards, when I released him on the table at work, it turned out that this gadget not only makes me laugh. And when I took it home and showed it to my Emi, a moment later, she was sitting on the kitchen floor with a roll of black electrical tape in her hand and pasting the routes. "Robocik called" her sweetie "and asked if she could keep him :) . Ah, those women :) .

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    The toy is very simple in its construction. And as some young readers will probably be surprised, it does not have any microcontroller in its structure. And yet, it is very good at moving along the designated line.

    What we get in the set, you can see in the photos below:

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.
    There is even a schematic and a "test track".

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.



    The set includes:

    1. Two geared motors. They are glued with double-sided foam tape, which allows them to be quickly mounted to the PCB.
    2. Two wheels, with "tires", and screws to screw them to the axles of the motors.
    3. LM393 double operational amplifier and a socket for it.
    4. Basket for two AA batteries. Stuck with double-sided adhesive tape.
    5. Switch button S1.
    6. The PCB which is also the supporting structure of the whole "robot".
    7. Two bright red LEDs in transparent housings. Cooperating with photoresistors.
    8. Two red LEDs in diffusion casings. Facilitating system adjustment.
    9. Two photoresistors. Acting in conjunction with bright LEDs, functions of sensors.
    10. Two 10kOhm mounting potentiometers. To adjust the system.
    11. Two 8550 transistors as drivers for the motors.
    12. Ten resistors with different values.
    13. Two electrolytic capacitors 100uF / 25V
    14. M4 screw with a decorative nut, with a rounded head. It functions as a third wheel, and that is a very weak solution.

    The system consumes 35mA at a voltage of 3V.


    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.

    Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review. Simple LineFollower. Without uC. Self-assembly - Made in China - Review.
    The system is very easy to assemble. As always, start with the lowest elements. It also suggests that you solder the wires to the pins on the motors before sticking everything together with double-sided tape.

    I must say that with this DIY Kit, I am very pleased. This is a gadget that can really teach you a lot and show that you can do something interesting on discrete components (apart from the integrated op-amp), without using the ubiquitous microcontrollers.
    The attached diagram will allow even very beginner electronics to understand the principle of operation of this gadget. Those slightly more advanced should understand it without even looking at this banal pattern.

    Summarizing. I believe that if someone wants to learn something and build a toy that will make many people smile, then this gadget is a bull's eye.
    If someone likes to combine, you can experiment with different LEDs that work with photoresistors. Can you change them to infrared (IR) and see what happens, will the photoresistor react at all, to this band? Or maybe ultraviolet (UV) diodes and mark the route so that it is visible only to our robot. Then just dress him up in a stuffed rat or some spider and you can get your mother-in-law's number :) sesese ...





    Best regards.
    CMS

    Cool? Ranking DIY
    Can you write similar article? Send message to me and you will get SD card 64GB.
    About Author
    CMS
    Administrator of HydePark
    Offline 
    CMS wrote 7249 posts with rating 1946, helped 181 times. Live in city Warszawa. Been with us since 2004 year.
  • #2
    gulson
    System Administrator
    The gadget I took casually turned out to be a great entertainment module. If someone has children, it can guarantee fun for long hours associated with the assembly itself, pasting the path by observing the behavior of the robot. Summarizing a toy for PLN 15 for large and small, integrating parents and children.

    Great review, thank you.
  • #3
    wiktor13570
    Level 12  
    In my opinion, the best of the tested putties so far.
  • #4
    398216 UsuniÍty
    Level 43  
    CMS wrote:
    it does not have any microcontroller in its structure. And yet, it is very good at moving along the designated line.
    Maybe that's why? Comparator based circuit I suppose? I did something similar once (also) for entertainment purposes. Somewhere else it lies in the junk ...
    As for marking the route with tape - I suspect that the demand for black electrical tape will increase sharply and ... for floor cleaning agents using residual glue and (if the tape runs out) felt-tip pens ...

    As for the ways to improve - maybe the third (trailing) wheel?

    Added after 2 [minutes]:

    PS
    Waiting for the tuner review ...
  • #5
    1 Marcin
    Level 17  
    Hello, I have to admit that I bought this car in December for children, but it has not been launched yet. It is soldered, only to insert the batteries. I wonder what to replace this screw with to make it look somehow neater.
  • #6
    CMS
    Administrator of HydePark
    This nut is a failure, when the insulation on the bends wrinkles, it gets stuck in these places. That's why in the video it's weighed down with stones (I stole from a flower). I think that if you reversed the direction of the motors so that this screw was in the role of the drag wheel, it would be better.
    I have no idea where to get such a small dragging wheel.
  • #7
    VIGOR_PICTURES
    Level 20  
    CMS wrote:

    I have no idea where to get such a small dragging wheel.


    Oh no! This CMS again! You open the fridge and there he and his Chinese toys ...
    Just a joke ;) .

    A no-nonsense idea may be ... A LEGO brick circle. Back in the day, in the SYSTEM series with aircraft, they were used as landing gear for aircraft. All you need to do is get a 'spin' block - I don't know what to name it :D . 2x2x1 / 3 where the base moved regardless of the top.

    best regards ;)
  • #8
    Simon79
    Level 19  
    I have this kit and I confirm, a small simple thing, and it enjoys. As for the screw, the more "professional" LineFollower designs use support balls, e.g .:
    Simple LineFollower. Without uC. Self-assembly - Made in China - Review.
    Unfortunately, the cost is half that shit :)
  • #9
    szeryf3
    Level 25  
    @CMS thank you for the reviews of the future toy for my grandson. I hope I can play with it.
  • #10
    CMS
    Administrator of HydePark
    I feel like Grandpa will have more fun :) .
  • #11
    radiomechanik
    Level 23  
    I know this topic for a good quarter of a century :-)
    On this principle, I used to service an automatic acetylene burner for cutting steel sheets and plates.
    Although in the beginning of the 90s, the first microcontrollers were already appearing, but the industry was dominated by i8085, Z80A and other clones straight from Comecon, occupying a large cabinet.
    Not every equipment was packed with an advanced digital camera, most of it was a combination of analog and TTL circuits (CMOS were slowly coming in)
    Thus, the head of the optical reader worked in the burner - a rotating eye with an illuminating halogen bulb (light color) and (if I remember correctly) eight detectors - photo transistors.
    The sensor was driving around the drawing made in black ink and, with a constant speed, it cut the desired element out of the sheet with a burner.
    All this was done with the help of analog comparators controlling the servo-drive mechanisms of DC motors for the feed of the torch head.
    DDR production machine :-)
    Dirt and sometimes damage to the phototransistors caused uncoordinated movements of the burner, which translated into unattractive patterns in the cut material ...