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Spinning/rolls count device

Discussion in 'General Electronics Discussion' started by Tttsss7, Sep 17, 2017.

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  1. Tttsss7

    Tttsss7

    4
    0
    Sep 17, 2017
    hi everybody
    i want to create a small device that count rolls for example i put it on a small wheel and when i spin it i want it to count how many Rotations.. and show it on LCD
    i want it to work with some gyro on the center of the wheel .

    any idea where can i get such thing? ready or to build one
    what parts do i need?

    thank you for any help.
     
    Last edited: Sep 17, 2017
  2. KMoffett

    KMoffett

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    Jan 21, 2009
    Can you show the "gyro"?

    Ken
     
  3. Braeden Hamson

    Braeden Hamson

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    13
    Feb 18, 2016
    Do you want to know how many times its rotated or do you want finer measures like half a turn quarter turn 1/30th of a roll?

    If you want one count per turn you could use a hall sensor and a magnet. You could set it up such that as the magnet passes the sensor it will pulse. This pulse can be counted by an arduino. You can also set used the hall sensor to measure the exact angle of the rotating body.

    On to the display, you can use two 7 segment displays that will let you display 99 to 0 rotations. You could add a third for 999 to 0. You could also use a dot matrix display which are nice and easy to use but are a bit larger than the 7 segment. But they can display like 9999999999999999. This would all be run off an arduino with a simple bit of code.

    Sound like what you're after?
     
  4. AnalogKid

    AnalogKid

    2,415
    686
    Jun 10, 2015
    Something like this?

    Magnet
    Reed switch
    CD4553 3-digit counter
    Display drivers
    Displays
    Reset button

    OR - get a 3- or 4-digit counter on ebay for next to nothing. Or a kit.

    ak
     
  5. KMoffett

    KMoffett

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    75
    Jan 21, 2009
    Adding a magnet to a balanced gyroscope wheel or axle would not be a good idea. That's why I asked about to see what type of "gyro" (s)he was using. Reflective ot transmissive optical would be less destabilizing.

    Ken
     
  6. Braeden Hamson

    Braeden Hamson

    220
    13
    Feb 18, 2016
    Yeah that is a good point, an optical system would be better.
    Tttsss are you wanting total turns or turns per unit time? Like RPM or something.
     
  7. BobK

    BobK

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    1,686
    Jan 5, 2010
    The gyro is a sensor to count the rotations, not the thing he is measuring.

    Bob
     
  8. Tttsss7

    Tttsss7

    4
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    Sep 17, 2017
    hi everybody thank's for all the answers
    I'll try to be more precise
    yes i need it to count only rotation mean (360 spin) and show it on screen
    the sensor need to be mounted on the center .
    for example somthing you can put on a spinning top
    and it count how many times he complete - 360 degrees

    hope i explaied it better now :)
     
  9. Braeden Hamson

    Braeden Hamson

    220
    13
    Feb 18, 2016
    Yes that is more helpful, I like Analog Kid's idea. It doesn't require coding and is straightforward. But the arduino might be easier to set up electrically and there's the potential that you can do some basic data processing to get RPM and total turns. Just out of curiosity what's the project? It sounds interesting, but if it's confidential I get that ;)
     
  10. Tttsss7

    Tttsss7

    4
    0
    Sep 17, 2017
    hi yes i am sorry i can't say :) thanks for understanding..
     
  11. Tttsss7

    Tttsss7

    4
    0
    Sep 17, 2017
    ok i found somthing
    how do i connect this to a LCD screen that count the rolls ? can i skip the arduino borad
    and connect it directly to lcd ?
    upload_2017-9-18_9-12-17.png
     
  12. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    You need a microcontroller to interpret the info coming out of the sensor and format and write this info to the LCD.

    This also requires programming.

    Bob
     
  13. Irv

    Irv

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    30
    Jun 7, 2017
    If this *must* be mounted on the spinning top, then something like BobK discusses might be appropriate - provided the top is big enough to hold the gyro board, microprocessor board, display, and a battery - and you can get all that in perfect balance.
    Could you just paint a white line down one side of the top (or stick some reflective tape there) and use a laser and detector to "watch" this top-secret top from a distance? A microprocessor to count and display the results would still be needed, but very inexpensive (maybe $15).
     
  14. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    Who said anything about a spinning top? In the OP he is talking about a wheel.

    He mentioned a gyro, as a sensor, and everyone seems to think he is talking about measuring the rotation of a spinning gyroscope. The gyro he refers to is a chip that senses angular rotation speed, not a spinning top.

    Mysterious what this wheel is attached to.

    Bob
     
  15. Irv

    Irv

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    Jun 7, 2017
    To quote the OP:
    "for example somthing you can put on a spinning top
    and it count how many times he complete - 360 degrees"
     
  16. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    It's sort of a whack-a-mole information request...20-questions may not get us there.

    Ken
     
  17. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    But he also said:

    "i want it to work with some gyro on the center of the wheel "

    Which I interpreted as using a gyro sensor, which he confirmed later when he linked to exactly that.

    Bob
     
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