» MAKE: NOISE — Discuss this article

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• Tooth graphics on case
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  Looking at the fine detail for the spray paint template graphics I'm not sure I could cleanly create these.
  
  Anyone try to decoupage color laser-printed graphics onto the outside? I was thinking of using a couple of coats of polyurethane over the exterior to protect them.
  
  Any advice?
  
  Thanks for a great project!

  Posted by ken.gentry707 on August 23, 2011 at 08:02:49 Pacific Time

• What size resistor for LEDs and piezo?
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  1/4 watt? 1/2 watt? I didn't know there were more than one category.

  Posted by JDS212 on April 05, 2011 at 12:19:28 Pacific Time

• #4 wood screws
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  These caused a LOT of splitting, plus it's WAY more screw than you need. I went to the smaller #2 screw.
  

  Posted by JDS212 on April 05, 2011 at 12:18:05 Pacific Time

• Lexan paneling?
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  Can we use Lexan instead of the acrylic paneling? It's waht I have lying around.
  
  -TheWaddleWaddle

  Posted by TheWaddleWaddle on April 04, 2011 at 15:01:43 Pacific Time

• Great Project
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  Thanks to everyone at Make for this great project!! My son and I built it for his science fair; we modified it somewhat to fit our needs - added a switch instead of requiring a secret knock, then changed the software to comply. It's very cool. We ended up having the wheel wiggle at the bottom to assist in rolling the gumball out. So much fun!

  Posted by Vidman81 on March 22, 2011 at 11:47:21 Pacific Time

• parts errata
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  Make sure that you procure a 3/16" bolt and t-nut rather than the 3/8" called for on the BOM (on my first go-around I followed the printed instructions, hammering in a 3/8" t-nut and destroying the side plate in the process)!

  Posted by kcornish on March 11, 2011 at 23:11:42 Pacific Time

• Secret-Knock Gumball Thingy
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  I need a few pieces of info to start collecting items for building a gumball machine. First, a place to find these items at and the prices w/ tax: 1/4" thick plywood, a 64" long 1/2" square wood stock, wood screws #8 and #12, t-nut 3/8", bolts 3/8" and 1 1/4", 3/4" OD and 3/16" ID washers, 7/32" diameter; 2" length brass tube, 5.5mm red and green LEDs, Resistors (100Ώ, 150Ώ, 10kΏ, and 470kΏ), 8' length of insulated solid core wire (22 gauge, multiple colors, insulated stick-on rubber feet, small cable ties, round head wood screws #2, round head machine screws
  #4-40, nuts #4-40, and sandpaper (80-grit and 120-grit). Anyone give me the info and no lying. All credit to Make: for the idea, Make:zine, and the TV series. Thank you dad for subscribing me.

  Posted by Chucky113 on March 02, 2011 at 14:24:31 Pacific Time

• Secret-Knock Gumball Thingy
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  The idea is cool as heck, but one question. Any user feel free to answer: What are the measurements for the plywood casing? I wanna make this thing so bad. If you know, pls respond. Ty

  Posted by Chucky113 on March 02, 2011 at 13:15:18 Pacific Time

• Success!
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  I just wanted to thank everyone at Make for this project. The gumball machine is finished and working perfectly. I amazed everyone at the office and we are off to share it with my kids' classmates at school! Great project! Thanks again!!!

  Posted by jbub on February 18, 2011 at 17:53:54 Pacific Time

• Larger Globe
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  Has anyone tried this with a bigger globe? I've acquired one with a 5 inch opening.

  Posted by metric_chicken on February 16, 2011 at 15:36:35 Pacific Time

• Servo horns and bolt size correction
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  Did I get a different horn set with my servo?
  http://www.dropbox.com/gallery/355931/1/GumballMachine?h=2536f5
  The x horn seems too small and flimsy, and I can't see attaching it to the dispensing wheel with screws. The double arm is beefier, so I'm planning to go with that.
  
  The materials list calls for 3/8" T-nut and bolt, when they should be 3/16", as mentioned later in the article. I'm also wondering why the bolt is only 1 1/4". It doesn't seem to extend very far into the dispensing wheel.

  Posted by kongorilla on February 09, 2011 at 11:57:53 Pacific Time

• Brass Tube
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  Where are people finding the brass tube? It would be nice if I could source it locally, but I've not seen anything at the usual suspects (Home Depot, Lowes, etc).
  
  Thanks.

  Posted by bgivens24 on February 08, 2011 at 09:29:22 Pacific Time

• Ponoko Files
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  I took the dxf files posted below and cleaned them up a little bit.
  
  http://www.ponoko.com/design-your-own/products/secret-knock-gumball-machine-5307
  
  (Or go to Ponoko and search for gumball in the showroom.)
  
  We tried to build it last night and there were a number of issues. Many of them are corrected here, but these could still use some work (eg mounting holes for the servo, and how do you mount the T-nut? and some others.)
  
  Note that we used the wooden rails to assemble the body. The author uses brackets, and possibly acrylic glue. Be careful which sides you glue, since you still want access to some things. Not sure if the holes are good for brackets.
  
  If you use these files and cut acrylic, please post your own changes and trials and tribulations here for all of us!
  
  Kiki
  

  Posted by Kikiorg on February 05, 2011 at 15:38:18 Pacific Time

• Hobbyking shipping from *Singapore*?!?!
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  I jumped on this when I got my Make in the mail and ordered the servo on Jan 26th. I just checked the tracking and it's coming from *Singapore*!! Egads!
  
  When I ordered, it said "in stock" and the web page says "Located in USA."
  
  I'm a bit bummed since I was mentoring a workshop for our group of Young Makers to build this on Friday. :..( I didn't order things online because of this reason.
  
  We have a backup plan, so we'll be able to build. But wanted to warn others -- maybe call your order in.
  
  Kiki
  

  Posted by Kikiorg on February 03, 2011 at 09:18:45 Pacific Time

• Stencils?
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  I'm unable to find the stencil design of the Evil Gumball sending the Tooth into orbit?

  Posted by marcel.grenier on February 02, 2011 at 15:25:23 Pacific Time

• Started Project - A few questions
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  I've been collecting the materials for this project and cutting the wood pieces while waiting for things like the servo to arrive in mail.
  
  One thing that surprised me is that the acrylic globe has no neck, so no way of being held in place that I can see. Is that correct? Not a problem?
  
  One mistake I've made in cutting is that I didn't check the measurements of my printed templates until I was halfway done using them. As a result, my stand will be about a 1/4" smaller overall (though the wheels are correct size). Should I anticipate problems from that? Or are the tolerances forgiving?
  
  My 8 year-old son and I plan to work on the electronics tomorrow, and he can't wait. In the empty areas of the stand I plan to add happy and sad (or maybe angry) faces that get illuminated to indicate knocking success or failure.
  
  Thanks for the fun project!

  Posted by kongorilla on January 29, 2011 at 15:33:24 Pacific Time

• Templates
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  What is up with the templates? Every time I go to open the link it just stops and gives me a blank page and does nothing.
  
  Tom

  Posted by kf4mat on January 24, 2011 at 09:03:54 Pacific Time

• Servo Reset
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  That worked great Laura! Thanks!!

  Posted by jbub on January 22, 2011 at 13:45:31 Pacific Time

• Servo reset
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  I have nearly all the parts purchased and am getting ready to put this one together! I can't wait to get started!! In my preparation I found that the web link to servo_reset.pde is not working. Can the link be fixed or are there any other suggestions for getting that file? Your help is much appreciated!

  Posted by jbub on January 20, 2011 at 09:29:36 Pacific Time

• DXF
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  Great article! My son and I are excited to build this, but I was wondering if you had the template in DXF format so we could cut the part with a laser.

  Posted by rat396 on January 18, 2011 at 06:22:06 Pacific Time