Year: 2012

Getting A Textured 3D Scan From Just A Webcam

April 30, 2012 by 17 Comments

Here’s an oldie but a goodie that passed us up the first time it went around the Internet. [Qi Pan], (former) PhD student at Cambridge, made a 3D modeling program using only a simple webcam. Not only does this make very fast work of building 3D models, the real texture is also rendered on the virtual object.

The project is called ProFORMA, and to get some idea of exactly how fast it is, the model of a church seen above was captured and rendered in a little over a minute. To get the incredible speed of ProFORMA, [Qi] had his webcam take a series of keyframes. When the model is rotated about 10°, another keyframe is taken and the corners are triangulated with some very fancy math.

Even though [Qi]’s project is from 2009, it seems like it would be better than the ReconstructMe, the Kinect-able 3D scanning we saw a while ago. There’s a great video of [Qi] modeling a papercraft church after the break, but check out the actual paper for a better idea of how ProFORMA works.

Continue reading “Getting A Textured 3D Scan From Just A Webcam” →

Multitouch Table Uses A Kinect For A 3D Display

April 30, 2012 by 14 Comments

[Bastian] sent in a coffee table he built. This isn’t a place to set your drinks and copies of Make, though: it’s a multitouch table with a 3D display. Since no description can do this table justice, take a look at the video.

The build was inspired by the subject of this Hackaday post where [programming4fun] was able to build a ‘holographic display’ using a regular 2D projector and a Kinect. Both builds work on the principle of redrawing the 3D space in relation to the user’s head – as [Bastian] moves his head around the coffee table, the Kinect tracks his location and moves the 3 dimensional grid of boxes in the opposite direction. It’s extremely clever, and looks to be a promising user interface.

In addition to a Kinect, the coffee table uses a Microsoft Surface-like display; four infrared lasers are placed at the corner and detected with a camera next to the projector in the base.

After the break you can see the demo video and a gallery of the images [Bastion] put up on the NUI group forum.

Continue reading “Multitouch Table Uses A Kinect For A 3D Display” →

Etching Your Own Boards Really, Really Fast

April 30, 2012 by 43 Comments

Sometimes the planets align and the Hackaday tip line gets two posts that are begging to be used together. Here’s two hacks to etch your own boards at home in just a few minutes.

Toner transfer PCBs on the quick

One way of putting an etch mask on a PCB is with the toner transfer method: print your circuit on a piece of inkjet photo paper using a laser printer, lay that circuit face down on a sheet of copper, and go at it with a clothes iron. This takes a heck of a lot of time and effort, but [Dustin] found another way. He used parchment paper instead of inkjet photo paper. Once the paper was on the board, he rolled it through a laminator. The results are awesome. It’s a very fast process as well – you don’t need to soak your board in water to get the photo paper off.

Etching that’s like wiping the copper away

[Royce] wrote in from the Milwaukee Makerspace to tell us about [Tom]’s etching process that is like wiping the copper off the board.  He used Muratic (Hydrochloric) acid and Hydrogen Peroxide with a sponge to wipe that copper away. The trick in this, we think, comes from the 30% H202 [Tom] picked up at a chemical supply company, but we’re pretty sure similar strengths can be purchased from beauty supply stores. Check out the video after the break to see [Tom] etch a 1 oz. board in just a few seconds.

Continue reading “Etching Your Own Boards Really, Really Fast” →

Bitbanging Super Smash Bros.

April 29, 2012 by 15 Comments

[Kyle] and an a few of his classmates are wrapping up a microcontroller interfacing class at Purdue and thought it best to send in the results of their efforts. It’s a version of Super Smash Bros. made by just bitbanging pins on a microcontroller.

The hardware for the project is based around a Freescale 9S12c32, an updated version of the 30-year-old M68HC11 microcontroller. For the controls, the guys used a Playstation 2 joystick and buttons housed in an Altoids box, and the actual console is made out of strips of wood stapled together to look like a crate from Super Smash Bros.

There are nine playable characters:  Pikachu, Captain Falcon, Yoshi, Donkey Kong, Mario, Luigi, Link, Kirby, and Fox. Despite these characters being only four pixels high, the game looks extremely playable (at least when two players don’t choose the same character). After the break is the video demo of Super Smash Bros: Bitbang edition, along with a gallery of pics showing the console and gameplay. All the code is up on GitHub for your perusal.

Continue reading “Bitbanging Super Smash Bros.” →

A Novel Binary Clock From Hackaday’s Own

April 29, 2012 by 13 Comments

Hackaday’s very own [Mike Szczys] just shared an awesome binary clock he’s been working on. Unlike a normal binary clock that is only readable by self-admitted geeks and nerds, [Mike]’s clock is nearly comprehensible by the general population.

There are 12 lines of three LEDs around the face of [Mike]’s clock. These LEDs represent the time in minutes in binary – the inner LED is 1, the middle LED is 2, and the outer LED is 4. Adding up each of the LEDs around the clock face gives the number of minutes passed since the top of the hour.

To display the hour, [Mike] used a red/blue bi-color LED in the center of each line of LEDs. For example, at 1:03 the one ‘o clock hand will have a blue LED in the first position and a purple LED in the second position. A minute later at 1:04, this changes to blue, red, blue.

If that is a little confusing, there’s a wonderful video demonstrating the pattern of LEDs throughout the hour.

For such an interesting clock, the build is fairly simple – just an ATtiny44 with an STP16CP05 LED driver. Time is kept with a battery-backed MCP7940 real-time clock, and power is provided by a simple USB port.

[Mike] had enough boards manufactured for several dozen clocks, but only had enough parts (and patience) to solder up four clocks. You can check out the time-lapse of him going to town with a soldering iron on one of these boards after the break. As with all good builds, the code and schematics are provided on GitHub if you’d like to make your own.

Continue reading “A Novel Binary Clock From Hackaday’s Own” →

Hackaday Links: April 29, 2012

April 29, 2012 by 11 Comments

More old computers on FPGAs!

[Andy] loves his Memotech MTX computer. It’s an oldie with a Z80 running at 4MHz; the perfect target for an FPGA port. The ReMemotech has everything the old one has – cassette interface and all – and can run up to six times faster than the original.

Also found in 10-forward

If you’re going to build a jukebox, why not go all out? Here’s a touch screen jukeboxwith an LCARS skin. Yep, the same interface found on Star Trek: The Next Generation.

New desktop wallpaper for you

[McMonster] found a great pair of blog posts (1, 2) showing what ancient ICs look like without their casing. Since these were CERDIP packages (two ceramic plates glued together) they were exceptionally easy to take apart leaving the entire chip intact. Pages are in Polish, but there’s a Google Translate button on the sidebar

Cheap and easy Arduino wi-fi

Quick quiz: what’s the easiest way to get data onto an Arduino wirelessly? XBees? GSM modules? Nope, just get a wireless router and an Ethernet shield. The Ethernet module only cost [Doss] $20, and we’re sure Hackaday readers have a spare wireless router around somewhere.

Chiptunes! Chiptunes I say!

[mdmoose29] has been working on making a custom SNES cartridge for a dubstep artist (tell us more, [moose]…). In his search for programming tools, he found theSNES Game Maker. We tried it out for a bit and it’s still a very unrefined beta. Still, making SNES programming easier is awesome.

You people are awesome. Here’s six things for a links post.

[Valentin] made a night vision monocular from an old VHS camcorder, a small spy camera, and a handful of infrared LEDs. Here’s a video of [Valentin]‘s build in action.

Land ROV Is Internet Connected And Packed Full Of Stuff

April 29, 2012 by 9 Comments

[Blair Kelly] has always been interesting in the concept of Remote Operated Vehicles. As soon as he got his hands on an Arduino he began his endeavor to turn an RC vehicle into a land-based ROV. What he’s done so far is incredible.

Here he’s showing off features of the build using a PS3 controller. But it can also take commands from an Xbox 360 controller or an arcade-style steering wheel. We like the latter the best, which is shown off at about six and a half minutes into the video (embedded after the break). Since there’s a webcam on board, this ends up being a virtual cockpit for the pint-sized car. But it gets better. That webcam is mounted on a servo motor, and [Blair] included controls that pan the camera. This lets the driver ‘look’ left and right. On the front of the vehicle there’s an accelerometer. Data is collected by the Arduino and sent via the WiFly module. This adds rumble to the controller if you’re using one that has that ability.

It’s a big project already, but it sounds like [Blair] has not end of ideas for future versions. Right now he’s planning to increase the overall size which will let him explore places that aren’t as flat as his livingroom.

Continue reading “Land ROV Is Internet Connected And Packed Full Of Stuff” →