This is a project that I have thought about making for years - Now I am finally doing it.
One of the problems with MAME cabinets, is that they take up so much space. Don't get me wrong, that's also one of the strong points of them, but it not always practical having a family and no spare rooms.
I got the idea to make a dedicated console for retro / mame gaming to plug directly into the TV / Projector / monitor. Just like a PS3 or Xbox 360, but with the full range of retro games and with the perfect controls for it. Yes, you could use your PS3/Xbox360 or HTPC and arcade controls for the same purpurse, but a dedicated cabinet, with customized software is always much much better. At least that is my experience.
This was my requirements for such a device:
Good looks - At least as good looking as the TV or PS3/Xbox360
Silent operation - It has to be more silent than PS3/Xbox360
Fast booting - Has to be ready in under 20 secs
Quality arcade controls - Seimitsu LS-32 and 30 mm push buttons
Build in Wireless controller support - I love the Xbox 360 controllers
Compact - Smaller than a PS3 slim
Sleek Front-end - That will work with both the arcade controls and the game pad.
Maximum spouse accepting factor - Otherwise I would just have a 4 player MAME cab in the living room.
Multiple connections - Got to have HDMI / VGA / DVI and maybe composite too
Powerfull - Has to handle MAME, NES, SNES, GENESIS, N64, PSX, PS2, Dreamcast, GameCube etc.
Here is a little rendering teaser of the console.

I am actually building it right now and it will look just like the rendering. I just got the laser cut acrylics and soon I will start the assembly.
This is actually a very inexpensive project to make. Depending on you hardware demands. This is the hardware I will use:
Asrock E350M1 - Dual Core and onboard DX11 gfx with HDMI
2 GB DDR3-1333
64 GB SSD - Crucial C300 RealSSD SATA6
PicoPSU 80 watt
External 60 watt 12v PSU
Now the actual construction:
Read more here:
http://www.koenigs.dk/mame/eng/stepecon.htmThe acrylic parts:
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This is how it looks when you remove all the excess material. Only a small handful of excess material is removed. I always save these to make reinforcements or other things. You just never know if you are going to need it later.
The assembly:
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Well - With a new born daughter, it's pretty hard to find the time for assembling the cabinet, so I have to do this in the late hours. This also means that the pictures will be a little fuzzy due to the lack of natural light.
Once more I use my trustworthy kitchen table and wall, knowing this has an exact 90 degree angle.
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This is the critical part. You really have to make sure the back panel is turned the right way around, or the whole project is wasted

I guess we found out when mounting the mini-itx motherboard later.
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The bottom panel has holes for standard brass motherboard standoffs. I recommend using some glue or epoxy before screwing them in, just to make sure they stay there.
You can also see the clever system for hiding the screw heads and mounting the 2.5" hard disk with hidden screw heads. Under each hole there is a bigger hole with room for the screw heads.
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Installing the push buttons, the joystick and encoders. I'm testing an E-limitator from ArcadeShop.de to see if it actually works. The E-limitator is an electronic device that predicts the right directions when playing 4-way games like Pac-man or Donkey Kong. You have to shift between 8, 4 or 2-way with a button.
The econ is a very flat cabinet with low installation depth, so I couldn't use an UltraStik 360, this is why I am trying the E-limitator instead.
I am yet to find out if the E-limitator works, but I can safely say that the UltraStik 360 is much easier to installs and feels better that your good old micro-switch stick.
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I finally received the walnut veneer and here I'm preparing the surface for applying it with epoxy.
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The veneer is covered in epoxy and I use as much weight as possible to get a smooth surface.
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After cutting the excess veneer off and sanding the edges and the surface, it looks like this. Can't wait to apply the varnish.
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The varnish makes all the difference in the world

Huuuuuuuge difference.....
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Looking good I think.
Finished cabinet:


Read more here:
http://www.koenigs.dk/mame/eng/stepecon.htmDrawings and artwork available for download:
http://www.koenigs.dk/mame/eng/drawecon.htm