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Arduino
Arduino Forum Help with Arduino powered Hi-Striker Carnival Game
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  • carnival
  • high-striker
  • hi-striker
  • arduino
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Related

Help with Arduino powered Hi-Striker Carnival Game

Former Member
Former Member over 10 years ago

Hi, I'm new to this community, but love watching Ben and thought it would be a great place to ask my question.

 

I'm working on an electronic hi-striker for a carnival game.  My friends are doing the metal working, and I'm doing the electronics.  So far I've got a nice strand of 125 Neopixels dancing happily when I touch a basic force sensor (Round Force-Sensitive Resistor (FSR)).  I bought the FSR as a "proof of concept" and it works for that purpose.  However, this won't work at all for the final game as folks will be hitting with a lot of force, with a rubber mallet, and the sensor would either break or just show max score every time.

 

I bought this as well (https://www.sparkfun.com/products/13332) thinking it would work, but it's tiny and really designed more for weighing material like on a bathroom scale up to 200kg.

 

My research shows me that others have had luck with a radiator hose with one of these placed inside (MPX4250AP), and others have had luck with an accelerometer.

 

Would anyone have any advice for which way to go?  I'm new to all these devices, so the learning curve will be the same.  I would like to keep all the electronics inside the striker pad assembly instead of in the mallet (it might get stolen, don't want to tether it with a cord, etc.)

 

Thanks in advance,

 

Aaron in California

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  • Former Member
    Former Member over 10 years ago +1 suggested
    Hi aaron you could direct the air pressure from the hose onto a loudspeaker in a can and measure the output from the speaker (peak audio level) to get a voltage level you can use to drive your leds. Adafuit…
  • Former Member
    Former Member over 10 years ago +1
    Figured I'd update this post, just so it's not lingering out in cyberspace. My team decided that in the hot desert sun of Burning Man, the radiator hose wouldn't last all that long. They are expecting…
  • Workshopshed
    0 Workshopshed over 10 years ago

    Hi Aaron, I think I'd go for the hose approach. The advantage of using air pressure is that the electronics are away from the parts that are being hit. You could also tune it by applying a restriction to the hose. The MPX4250APMPX4250AP looks like a simple sensor to interface, you just need to read the voltage via one of the analogue pins.

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  • Former Member
    0 Former Member over 10 years ago

    Hi aaron

     

    you could direct the air pressure from the hose onto a loudspeaker in a can and measure the output from the speaker (peak audio  level) to get a voltage level you can use to drive your leds.  Adafuit have an article on sound measurement using Arduino which might help  https://learn.adafruit.com/adafruit-microphone-amplifier-breakout/measuring-sound-levels

     

    I would also caution against mounting electronics in the anvil as they generally react badly to shock loads.

     

    regards

     

    John

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  • Former Member
    0 Former Member over 10 years ago

    Figured I'd update this post, just so it's not lingering out in cyberspace.  My team decided that in the hot desert sun of Burning Man, the radiator hose wouldn't last all that long.  They are expecting the device to be hit over and over again for hours/days over the event.

     

    So I dove into the land of accelerometers, and found that I have little to zero knowledge on how to make it work.  After much crying and gnashing of teeth, I was able to get it to work well enough that I can consider it functional.  I think that a trigonometry or statistics nut would be able to make this work better, but with my limited knowledge and google-fu, I was able to figure out a method of parsing the data from the accelerometer, averaging the results and running it through a neat calculation that gets the square root of the multiplied values.  This gives me a single value that I can use to determine how hard the strike was.  In the end, it's not terribly accurate.  But, since it is a carnival game, and carnival games are supposed to be "rigged", my team likes it and we're running with it.

     

    If anyone wants to look over my code, feel free.  I'd love to hear any feedback.  Otherwise, thanks for the advice Element14!

     

    https://github.com/richardoson/Arduino_Hi-Striker/blob/master/StrikerInputFromAccelerometer/StrikerInputFromAcceleromete…

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  • Workshopshed
    0 Workshopshed over 10 years ago in reply to Former Member

    Yes, I expect that the burning man is a challenging environment for any project. Glad that you've got a working system.

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