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Documents Ben Heck's Halloween Superhero Wearables Part 1: Development Episode -- Episode 257
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  • Author Author: joeman
  • Date Created: 29 Sep 2016 6:41 PM Date Created
  • Last Updated Last Updated: 23 Sep 2016 7:24 AM
  • Views 1477 views
  • Likes 8 likes
  • Comments 5 comments
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Ben Heck's Halloween Superhero Wearables Part 1: Development Episode -- Episode 257

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See also: Episode 258: Ben Heck's Halloween Superhero Wearables Part 2: Assembly Episode

 

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Karen daydreams about being a Superhero.  Can Ben transform Karen into Captain Tangent using accelerometers to detect speed, magnetometers to detect orientation, a microcontroller, and speakers that make sounds for punches and kicks?

Episode 258: Ben Heck's Halloween Superhero Wearables Part 2: Assembly

 

Supporting Files

Click Herefor access to all the supporting files you will need to replicate this build!

 

The team begins work on a Superhero combat costume for Halloween. To get started on the sound effects for punches and kicks; Ben uses a Parallax Propeller Prop Dev Stick, four FLORA LSM303 Accelerometers for each limb, and an I2C expander to multiplex the signal. The I2C expander allows communication with individual Accelerometers even though each one shares the same I2C bus address. Ben attaches and solders the Parallax Propeller and the IC2 expander onto a perf board. He then runs experiments with the help of an oscilloscope to get the Propeller to talk to the expander.

 

You can send a command to the expander telling it what device you want then all further commands go to that device. First you tell I2C where to read from then you connect again and get the requested data. MCU’s have dedicated I2C lines, but you can also bit-bang it with any available I/O.

 

Karen supplies speakers from a stereo that was taken apart. They use 3D printed parts to connect the speaker parts to a belt clip. The plan is to place an EL inverter in the back and stereo speakers on each side to provide good stereo separation. The EL wires require AC so they use a DC-AC converter, often called an inverter.

 

To get the propeller to work Ben uses some Arduino code that Felix has already tested. Because there is a lot of example code for the ATMEGA328 (Arduino Uno) it’s a fast way to get stuff running. Ben works on the sensors profiles used to register kicks and punches. In phones, a magnetometer is used to determine the orientation of each sensor. Although phone apps use much more advanced sensor profiles but their profile should be enough to register fast movement. It’s also necessary to examine change over time (10-50ms) to determine the change speed and intent of Karen’s movements.

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Top Comments

  • mrbadwrench
    mrbadwrench over 8 years ago +1
    I am painting a 24in BMX bike to look like a Kuwahara ET bike with basket and all, putting a inflatable alien under a blanket in the basket with a speaker, and using a soundboard on my tablet to play ET…
  • mechnerd19
    mechnerd19 over 5 years ago

    This was a great tutorial and build. I'm ready to watch part 3. Please send the link to me if it's already available. Thanks

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  • beacon_dave
    beacon_dave over 8 years ago in reply to mrbadwrench

    You could spice a bike up further with something like the Monkey Light Pro POV system.

    https://www.youtube.com/watch?v=3qq8r2Wg7gA

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  • DAB
    DAB over 8 years ago

    A great fun episode of TBHS.

     

    You have way too much fun doing these shows.

     

    DAB

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  • mrbadwrench
    mrbadwrench over 8 years ago

    I am painting a 24in BMX bike to look like a Kuwahara ET bike with basket and all, putting a inflatable alien under a blanket in the basket with a speaker, and using a soundboard on my tablet to play ET sounds and music while i ride around. i also bought a red hoodie.

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  • beacon_dave
    beacon_dave over 8 years ago

    makerkaren

    I thought it was a pretty good singing effort by Ben there. image

     

    'Waiting for a Star to Fall' was an eighties song by the band 'Boy Meets Girl' released in 1988.

    https://www.youtube.com/watch?v=RhxF9Qg5mOU

     

    It was then covered by the 'Sunset Strippers' in 2001 under the title of 'Falling Stars'.

    https://www.youtube.com/watch?v=2c1Y34vgrI8

     

    Karaoke machine type project in the future... ?

     

    The Halloween costume is looking good so far.

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