Hot plate stirrer dissolves support material in 3D printed objects

Hot_plate_stirrer

When you want to print a 3D object you run into problems if there is a part that has nothing below it. The hot, soft filament coming out of the extruder will droop with gravity if not given something to rest on while it hardens. The solution is to use a second material as a support. But then you’ve got to find a way to remove the support structure when the printing is done. That’s where this beauty comes in. It’s a heated stir plate for dissolving PLA.

The PLA is printed using a second extruder head. Once the part is cooled [Petrus] puts it into a heated bath of sodium hydroxide (lye). The solvent will remove the PLA but not harm the ABS. Speaking of ABS, [Petrus] also mentions that this can double as a temperature controlled hot plate for polishing ABS prints using acetone vapor.

There’s all kinds of good stuff inside of this beast so do check out the full plans to learn more. Our favorite part is the stir bar which is a piece of threaded rod and a couple of nuts. To make it safe to submerge in the chemicals he 3D printed a pill-shaped enclosure for it.

[Thanks Matt]

Atari Combo Controller has what you need for any cartridge

atari-combo-controller

Retro gaming enthusiasts take note: this joystick is what you need to play any Atari game on the original console. It plugs right into the original console hardware and removes the need to choose the joystick, paddle, or keypad controller separately. You just leave this puppy hooked up and move your hands to the set of controls used on each game.

[x2Jiggy] built the thing from scratch. The enclosure is a wooden box from the craft store. He holds it closed with a couple of magnetic latches like you might find on old fashioned kitchen cabinets. The buttons of the keypad are mounted on a chunk of protoboard but he did take the time to give it a coat of matching paint so that it doesn’t look out of place. Inside you’ll find some more protoboard and point-to-point soldering to complete the rest of the connections.

You can see a fast motion video of the build process after the break. This reminds us of the universal controller built for Project Unity.

[Read more...]

Microsoft IllumiRoom breaks your video game out of its television prison

microsoft-illumiroom

We see a lot of video game tech coming out of the three console giants (Microsoft, Sony, and Nintendo). With one look we can usually predict what is going to be a flop. Case and point is the Wii U whose sales have been less than extraordinary and Sony Move which is motion control directed as hardcore games who we believe are perfectly happy with the current evolution of their dual shock controllers. But this time around we think Microsoft has it nailed. They’re showing off technology they call IllumiRoom which uses a projector to bring your entire gaming room into the experience.

The image above is not doctored. This is a picture of IllumiRoom in action. A projector on the coffee table automatically calibrates to the room (using Kinect 3D data for mapping) in order to show realistic graphic rendering on the non-flat projection surfaces. In our mind, this comes straight out of Kinect hacking projects like the Hadouken projector. With this in place, the game designers are given free rein to come up with all kinds of different ways to use the feature. Stick with us after the break to see what they’ve developed.

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Pebble watch hack makes it a home automation controller

pebble-watch-hack-home-automation

[Enrico] loves his Pebble watch, and recently had a chance to explore the code package used to customize its function. It turned out to be really easy to work with so he set out to make the Pebble watch into a home automation controller.

So far the two bits of hardware used in his experiments are shown in the image above. The watch itself serves as the controller, interacting with the Ethernet relay board seen in the background. The watch communicates via Bluetooth but you don’t have to know much about that thanks to the example files available from the repository. With communications taken care of he needed a menu system to access commands on the watch. Instead of coding his own he hacked a playlist into the built-in music menu. This allows him to switch the relays on and off again as if he were playing or pausing audio tracks. See it in action after the break.

[Read more...]

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