Arcade Coin Door

by Big-E, published

Arcade Coin Door by Big-E Aug 12, 2014
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Made for my emulator cabinet project, this Faux Arcade Coin Door is the first of a collection of Arcade related things I have made as of late.
It looks like the real thing; The slot is big enough to accept a quarter (or a token) but it was made for looks. When lit with LED's it looks genuine. It can be modified to be used on many projects: turn it into a fridge magnet or a piggy bank; use your imagination!

This was based on the sketchup model by XyloSesame https://3dwarehouse.sketchup.com/model.html?id=6c1173844346904c06dde090b695257
But modded heavily, as I had issues with the original, but it was good enough to get the scale correct. I added fake coin returns and it's about the scale of a mini coin door.
Be sure to read the instructions. There's a trick to printing the reject buttons.


Print the file, "Coin_Door_Final.stl" in black at medium resolution. you will need a level bed
then print two copies of "coin_button_scaled.stl" There's a trick to it:
they must be printed at medium quality (.2mm layer height) no support or raft. start the print using black filament.
immediately after the first two layers have been printed, pause, and switch to a translucent color of filament (I used translucent Red PLA) and finish the print.
You will need to press the reject buttons into the bezel, from the front. Use a little super lube grease on the inside of the bezel opening and the outside walls of the button, because it's a tight fit. Start by pressing the top edge of the button into the slot, slide the button up, and get the bottom edge lined up and started in. flip the entire panel over, and using your hand, smack it hard to press the button into the bezel. the button face should be flush with the bezel. be sure the button face is flush against the work surface before smacking it.
I included "Coin_Button_Smaller.stl" so it could be modded into a pushable reject button. you will need to add a spring and a fastener to it, look at genuine coin reject buttons to get an idea of how they work.
Wire up some LEDs for the buttons, using a matching color really makes them pop. I used two wide-angle bright red LED's wired in parallel, using a 100-Ohm resistor on each, and wired them to a USB cable to power them, but you can wire them up as you like, depending on your application.
adding a piece of white paper behind the button and LED helps diffuse the light, and makes it look even better, btw.
The rest is up to you!
I included a mockup stl file for reference; It's not meant for printing.
If you make this, please post it, especially if you do buttons in different colors! I'd love to see the results!
Happy gaming!
*note, there is one small flaw in the coin door, to the left of the leftmost bezel. It shouldn't be noticeable in most applications. I plan on fixing it and posting a revised part in the near future for you perfectionists out there. I may also make different lock faces for the door as well. If you want different text on a button, drop me a PM and I'll take it under advisement.
I just added "coin_button_blank_scaled.stl" which is a blank version of the press-fit coin button, so you can customize it with your own text or graphic, just be sure any graphic you add to it is .4 to .5 mm thick.

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Thank you so much for this .stl! I printed one, added an LED + arduino (micro), IR Emitter/receiver and now have a working coin door for my RetroPie arcade. I just got this working a few minutes ago, my son and I have been working on it for the past 2 weeks. I'll post a YouTube video soon. Just wanted to say "Thank You".

btw- You can see some of what we've done already on Facebook, https://www.facebook.com/jwagnertech/

Here's the video of how we used this model: http://www.youtube.com/watch?v=iZGhxdxC9DU

Hope this helps others!

Thanks! looks awesome!

Could you share your .skp files? I'd like adapter this door to one-button for my arcade cabinet.

The Original SKP files weren't by me, But I linked the source in the summary under the Thing Details.
If you want to download it, You probably should, I don't know how much longer it will be up. I didn't get authorization from the designer, otherwise, I would have shared them with my STL's.

Xylosesame's Sketchup files can be found here:

I used other tools to modify the source after they were exported to other formats. I'll see if I can find them. If so, I'll post them.

I could also probably make a single button version and post it up. I'll check out some references and see what I can come up with. I've been working on a new thing based on this design and was planning on posting it in the near future, so it wouldn't be that much trouble.

Thanks for your help! I tried to make a single-button version, and this was my result:

But I don't know how finish it, as your version, to make all backside completely flat.

All help will be welcome, thanks Big-E!

Awesome!! Thanks for Sharing

Glad you like it; Your print turned out nice!

The source I derived this from is on sketchup. I linked it in the thing info.

Everything else was done using tinkercad, Wings3D and tools to add the text to the button (converted an image to an SVG path using inkscape)
I'll see what I can do to open up the tinkercad files if you're still interested, but the base source from Xylosesame I modified is here:
I might also have some of the files I generated from Wings3D still; I'll need to double check.

OK, This is slightly Awesome! I have some ideas I would like to play around with however... any chance you can post your source files?

Thanks for the awesome design, I currently have generic pushbutton switches in place, but they just don't look the part. I'll see if I can somehow integrate a switch into your design. Thanks for sharing.

no problem.

For a quick solution, you could always mount a pair of black, momentary push buttons into the coin returns; of course, half of the challenge is making those coin rejects work. be sure to share your results if you come up with something. :)

You might be able to rig up your smaller button to a microswitch, and have it act as a credit button or service button.

Sorry about the serial posts, but this thing is awesome!

Yes, I originally planned on doing that; I already use some buttons on my control panel to add credits, but I planned on slaving those buttons to the coin door as well. However, due to time constraints, I shelved that idea. Still, I have the smaller buttons; which were made early in the build, and included them for those who were daring enough to implement it. There's always the possibility of incorporating a coin mech of some sort if someone wanted to go all out, which is why I was careful to add coin slots; or actually use a quarter in the coin slot, held in a clip that triggers the microswitch (push the quarter to add a credit). This part has many possibilities, which is why I kept it simple and versatile.

Glad you like it; that's why I post these things; for those that can appreciate and use them.

Great Idea to use your layers for the coin reject text.

On the "real" reject buttons of this type, a translucent white insert with the design printed onto it is sandwiched between clear colored layers. They look very similar to this, but one is smaller, and nests into the back of this button. the back piece has a post to align a spring. You can make custom inserts with inkjet paper.

Hope that made sense.

I love the fridge magnet Idea, I might just do that once I get printing!

I know about that; I have always been into how arcade cabinets worked. A lot of people use inkjet translucency sheets to make their own inserts.

When making the original button (the smaller one) I was adding a post to the interior, with a a hole through the center and a slot for a captive nut, so you would be able to add a spring and a bolt. drill a hole in the panel you mount the door to, thread the fastener through, add the spring, and screw it in to the button. a microswitch could be triggered by the head of your bolt when the reject was pressed. However, inserting a captive nut would be tricky within the tight confines of the button, and how the added material would affect the lighting was a concern. It's still doable, and I may eventually revisit it. But, I posted the shell of the smaller button so if someone were more adventurous or eager they could give it a go.

If you like this, you may appreciate the design I plan to post next. Let's just say it was designed to resolve an issue with many a cluttered control panel layout.

Oooh, the anticipation is killing me already! I am looking forward to that.

This looks great! I am an arcade collector, and this looks like the real thing. You could probably make it look even more real by spraying it with satin black spraypaint, and some metallic silver for the lock. The satin paint is what I use to refinish old coin doors, and might hide the printed look a bit.

Yes, I did wet-sand it a little; I've considered using satin clear on it for this reason. I've spray-painted printed parts before, and it definitely smooths them out after laying down about three coats. It's good advice.

Haven't installed it yet, I will either use four small pan head screws, or some construction adhesive. to mount it to my cab. I'll post up pics once I've mounted it. I wanted something that looked good, not Novagem buttons or a sticker. an actual coin door blank would be great, but money is tight, so I came up with this as a nice, happy medium.

I have a few more bits that I've made for my project; I will be posting them as well over the next week here on thinigiverse.