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lottery wheel

Discussion in 'General Electronics Discussion' started by tounsi, Feb 21, 2012.

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  1. tounsi

    tounsi

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    Feb 21, 2012
    Hello everybody, This is my first post.. So please be kind ops:
    I am a novice when It comes to building electronic circuits, but I do know the basics and know a few components used in electronics.



    I can not do has an electronic roulette that consists of 10 LEDs arranged in a circle. When you press the start button, the wheel is turned and a random number generator starts: he commanded a light band consists of 10 LED (shooting star). When you release the button, the speed decreases slowly to a stop and one of the LED lights so I hope aléatoire.


    I Explained what I need as best as I can, any help Would Be Appreciated

    thinks.
     
  2. KMoffett

    KMoffett

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    68
    Jan 21, 2009
    Google: electronic roulette wheel circuit

    Ken
     
  3. tounsi

    tounsi

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    Feb 21, 2012
    Hi KMoffet

    I would like electronic roulette of 10 LEDs make like a shooting star that is the LEDs (L1 + L2 + L3 + L4) that light up and the LEDs (L2 + L3 + L4 + L5) that s' and light (L3 + L4 + L5 + L6) and so on. Then I want this falling star slowed down and stopped on the last led to the star.

    I Explained what I need as best as I can, any help Would Be Appreciated
     
  4. KMoffett

    KMoffett

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    Jan 21, 2009
    I think you're going to need a microcontroller with at least 10 outputs to achieve that complexity. I might recommend a PICAXE 20M2 or 20X2. They are ~$10 each. The programming is in BASIC. The software is free. You only need a PC with a serial port, a home-made 3-wire serial cable, 2 resistors and a 5V power source to start.

    http://www.picaxe.com/Hardware/PICAXE-Chips/

    Ken
     
  5. tounsi

    tounsi

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    Feb 21, 2012
    I need to do a basic integrated circuit such as a counter 4029b, 10 Led ... without microcontroller. I would just like the schematic electronic.
     
  6. KMoffett

    KMoffett

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    Jan 21, 2009
    I don't think there is a schematic out there that would meet your requirements. It would require someone to go through the whole process of designing, simulating or building, drawing a schematic, and posting it here. Not likely to happen...creating a complex circuit operations using old technology.

    Sorry.

    Ken
     
  7. duke37

    duke37

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    Jan 9, 2011
    The 4017 Johnson counter will give one of ten outputs in sequence. You will need some means of slowing and stopping the clock. Perhaps a voltage to frequency chip (LM331N)?
    Just charge a capacitor on switch on and let it discharge through a resistance?
     
  8. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,362
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    Jan 21, 2010
    I was thinking the same thing.

    You could connect each output to a pulse extender (look up the datasheet on a Schmitt triger inverter). This would have the effect of causing the periods that the outputs are on to extend and give you a series of LEDs illuminated, the length of which would depend on the clock speed.

    So as the clock speed gets lower, the trail gets shorter. As the clock stops, only 1 LED is illuminated.

    One of the initial suggestions was to look for roulette wheel circuits on-line. From them you should be able to find an oscillator which slows to a stop.
     
  9. tounsi

    tounsi

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    Feb 21, 2012
  10. duke37

    duke37

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    Jan 9, 2011
    The 555 variable frequency oscillator looks good.

    Describe what you mean by a shooting star and a falling star.
     
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