3D Miniature Chess Pieces Made With A Laser Cutter

When you think of laser cutters, you generally don’t think of 3d parts. Well, at least not without using something like glue, nuts and bolts, or tabs and slots to hold multiple parts together. [Steve Kranz] shows you how to make these very tiny 3D chess pieces by making 2 passes at right angles to thick acrylic. The first pass cuts one side’s profile, then the part is rotated 90 degrees and a second pass is cut, giving the part more of a “real” 3D look, rather than something cut out of a flat sheet. If you’re having a hard time imagining how it works, his pictures do a great job of explaining the process. He even added some engraving to give the chess pieces for a selective frosted look. We think it’s a cool idea, and well executed too!

But that got us to thinking (always dangerous) that we’ve seen rotary attachments for laser cutters, but they are mainly for etching cylindrical objects like champagne flutes and beer bottle. What if you added a rotating “3rd” axis to a laser cutter that could hold a block of material and rotate it while being cut? (Much like a traditional 4th Axis on a CNC machine). Would the material also need to be raised and lowered to keep the laser focused? Surely software that is aimed at 3D CNC would be needed, something like Mach3 perhaps. A quick Google search show that there are some industrial machines that more-or-less do 3D laser cutting, but if you, or someone you know of, has attached a 3rd axis to a desktop laser, let us know in the comments, we would love to see it.

(via Adafruit)

Lonely? Build Yourself a Chess Robot!

[Oriol Galceran] has constructed an interesting robotic chess player for his end of school project. It’s called the ChessM8, and is an impressive feat considering [Oriol] is only 17!  He’s using an Arduino Mega that connects to the host PC via a Python script.

The AI can be any chess engine that uses the Universal Chess Interface protocol, which [Oriol] points out that most of them do.  We’ve seen other chess robots here before, along with others that you can play on your wall and uses Nixie Tubes. But [Oriol’s] build is the largest of them all.

He says there’s a network of REED switches under the chess board to detect when a piece is present or not. It would be interesting to know how he dealt with debouncing issues, and if Hall Effect sensors might have been a better choice. Let us know in the comments how you would detect the chess piece.

And be sure to check out the video below to see the chess robot in action.

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Tiny Chess Playing Computer

We have covered many chess computers in the past, but we think this might just be the smallest. Enter the PIC Blitz: A tiny low-cost low-power computer that can play lightning chess.

It’s based on a PIC16F628A microcontroller, which only has 3.5kbytes of flash and a mere 224 bytes of RAM. For comparison, Boris (one of the first consumer chess computers), utilized an 8-bit microprocessor with 2.5 kbytes of ROM and 256 bytes of RAM.

PIC Blitz has a full fledged chess library: it knows all the moves, all the basic openings and even changes its evaluation function weights as the game progresses to keep the game interesting. The creator [Mark Owen] quips about some of the additional techniques he utilized to make up for the limited processing power; including “pondering time”, a difficult and slow user interface, and of course, a barely-comprehensible LCD.

If you’re interested he has released the files under Creative Commons, and has a link to the PCB layout on the project page – we won’t link it directly though, since it goes straight to a download.

[Thanks Martin!]

Hackaday Links: Sunday, May 19th, 2013


Laser cutter owners may find this online box design tool which [Jon] built quite useful. It’s got a few more joint options than the Inkscape box design add-on does.

Apparently the US Navy has the ability to bring down drones in a flaming pile of laser-caused death. [Thanks Joshua]

[Michail] has been working on a transistor-based full adder. He’s posted a Spice simulation if you want to learn about the design.

Turn your crystal clear LED bodies into diffuse ones using a wooden dowel, power drill, and sandpaper. The results look better than what we’ve accomplished by hand. [Thanks Vinnie]

Play your favorite Atari Jaguar games on an FPGA thanks to the work [Gregory Estrade] did to get it running on a Stratix-II board. You can pick up the VHDL and support tools in his repo. If you’re just curious you can watch his demo vid.

Members of Open Space Aarhus — a hackerspace in Risskov, Denmark — have been playing around with a bunch of old server fans. They made a skirtless hovercraft by taping them together and letting them rip. Too bad it can’t carry its own power supply

Here’s another final project from that bountiful Cornell embedded systems class. This team of students made a maze game that forms the maze by capturing walls drawn on a white board.

And finally, here’s a unique chess board you can build by raiding your parts bin. [Tetris Monkey] made the board from the LCD screen of a broken monitor. The playing pieces are salvaged electronics (like big capacitors) against corroded hardware (like nuts and bolts). We think it came out just great!

Voice controlled chess robot


[Ben Yeh] wrote in to tell us about this voice-controlled chess robot he built along with three others as a final project for their Georgia Tech ECE 4180 Embedded Systems Design class.

To handle the speech recognition they grabbed an EasyVR board. This is a fine solution because it prevents the need for a computer to process voice commands (remember, it’s an embedded systems class). This concept breaks down when you find out that the desktop computer next to the robot is where the chess game is running. Perhaps that can be moved to a microcontroller by the next set of 4180 students.

The robot arm portion of the project is shown off well in the clip after the break. Normally we’d expect to see stepper motors driving the axes of a CNC machine but in this case they’re using servo motors with built-in encoders. The encoders are i2c devices which feed info back to the main controller. There was a parts ordering snafu and the z axis motor doesn’t have an encoder. No problem, they just added a distance sensor and a reflector to measure the up and down movement of the claw.

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Virtual chess uses glove controllers


Check out the game of chess going on above. It’s a virtual game where each player uses a glove as the controller. Or course the game board and pieces are missing from this image. They’re displayed on a computer monitor which both players can see.

The hardware rather simple, and we think it would be a great project to challenge your microcontroller skills. Each glove has an accelerometer attached to it, as well as a ring of copper foil on the pointer finger and thumb. One ATmega1284 monitors both gloves. The accelerometer data is used to move the mouse cursor on the screen, while the contacts are used to grip or release a playing piece. The game board and pieces are displayed using MATLAB with controller commands fed to it via a USB connection.

If you’re more into building a mechanized game check out this pair of telepresence chess boards.

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How about a nice game of Nixie chess?

[Tony] sent in a Nixie tube chess set he’s been working on, and we’re just floored with the quality of this build. The chess pieces glow without any visible wires, the board is extremely elegant with touches of gilding and brass, and extremely well designed using (mostly) materials and components contemporary to the old Russian Nixie tubes.

Instead of numeric Nixies, [Tony] chose IN-7 and IN-7A tubes originally made to display scientific symbols such as A, V, and ~. To power the these tubes, [Tony] used 64 air-core transformers underneath each square on the chess board, allowing these Nixie tubes to be powered just like an induction charger.

Even though his blog posts are a little thin on details, we’ve got to hand it to [Tony] for an amazing build. He says there will be a kit available that includes a gigantic PCB, but we wouldn’t hazard a guess as to how much that will cost.

You can check out a pair of videos of the Nixie chess set in action after the break.

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