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I'm trying to make a new kind of Zoetrope... and measure earth's gravitational acceleration.

Discussion in 'Homework Help' started by WillowWaily, Mar 14, 2016.

  1. WillowWaily

    WillowWaily New Member

    Joined:
    Mar 14, 2016
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    Maybe you all can help!

    I am a physics major and electronics is not my strength.


    Here’s the situation: I have certain materials with which I need to accomplish a certain task (that being, to make my zoetrope)

    I. The task

    • Make a stepper motor rotate at certain rpms.
    • Make 5 LED’s flash with the same frequency of the motor’s rpm “frequency,” or with a frequency which is a multiple of the rpm “frequency.”

    (I'll be using the stepper motor to oscillate a series of water outlets back and forth, then the LED's will flash on every time the outlets return to a certain location, this will give the water "waves" the appearance of being frozen in place. Cool side note: I think I might be able to use this type of "zoetrope" to measure earth's gravitational acceleration...)

    II. The materials

    • Two small bread boards o One of them came with a nifty pallet connection with a USB power port, a button, LED and something else, I assume this can be used in various and sundry ways…
    • Micro-controller
    • Various capacitors, resistors, etc…
    • 1600 MHz crystals
    • 5pcs 3W UV Purple LED light bulb lamp 20mm star bean SMD SMT
    • FTDI USB Controller 3 3V 5V Female Firmware Loader
    • EasyDriver Shield stepping Stepper Motor Driver V44 A3967 for Arduino N 89
    • 700mA flexblock constant current driver for the LEDs

    What have I done so far?

    I assembled a basic arduino circuit based on the instructions in the link below:

    http://www.jameco.com/Jameco/workshop/JamecoBuilds/arduinocircuit.html?CID=arduinobuild

    I am not sure how to continue at this point… I need some pointers. Got any ideas?

    p.s. pardon my messy wires on the breadboard, I am going to clean those up before I am done. I just didn't want to cut and clean a bunch of wires yet (especially since they all came with such nice tips!)

    20160309_184824.jpg 20160309_184940.jpg 20160309_184740.jpg
     
    Last edited: Mar 17, 2016
  2. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

    Joined:
    Aug 31, 2012
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    Location:
    Richmond Hill , ON Canada near Toronto
    Start with a design spec that defines all input and output functions without implementation in mind.
    It can be in point form with a matrix of logic functions with time response expected.

    what can you do so far with the tools you have?
     

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