A Tree-Mounted Drink Holder

If during a rousing game of ladder toss, or cornhole you get thirsty, you may find that you have nowhere to place your drink.  Fortunately, if there are trees around, and you have a 2×4 handy, JCoPro.net has you covered.

Hopefully the pictures more or less illustrate what I did.  As far as supplies go, Read more »

Making a “Beest” Leg Linkage System

First of all, thanks to Theo Jansen, then Dominique Studer as they have done much of the “kinematics” work needed for the contraption that I intend to make, a four-legged walking ‘beest.  Regardless, what I am working on is a definite departure from either of these machines.  As I’ve been discovering, making something like this in real life is a definite challenge, whether or not you have some interesting examples to help inspire and guide you.  Here’s a video of me doing an early test of one of the legs:

Obviously it still needs some work. If you think it’s easy to even get to this point, be sure to check out the time-lapse video and pictures of the manufacturing process after the “read more.”

What I built was most directly based Read more »

An Explanation of How Light Graffiti Works

laser-painted-smileMaybe you’re curious about light graffiti, but how does it actually work? 

The short answer is that when you open up the shutter of your camera and draw an image with a light source, the camera records all light in front of it as if it happened at once.  It’s recording the light without regard to what time the light comes in, just like a piece of paper records a pencil’s lead, but not at what time it was scribed there.

An illustration of How Light Graffiti Works:

This animated GIF should show things somewhat more visually (as I attempted to do with this glowing display).  My camera was set to take several shots one after another at a pre-determined exposure time.  In this animated GIF each frame is actually the product of it and every previous frame added together with GIMP (how the double-exposures were made and the animation).  The end product is equivalent to what happens in a camera when the shutter is opened and it captures all of the light going in.

To put it another way, Read more »

Glowing Automatic Light Graffiti

As fun as light graffiti is, it doesn’t necessarily translate to something you can show people in real life.  Fortunately, after a conversation with Susan at the Greenville Makers Group, an idea was hatched to use a “Glow Crazy” toy’s surface to show what I was drawing for longer than, say, a wall would.  Check out the video below to see what I mean:

booth-glow-crazyI designed the “servo light graffiti device a while ago, and Most of the details on this build can be found here, as well as some later changes that made the pixels into “X”s.  Nothing has really changed for the show besides a neat background, and a bin to keep some of the light away.

Unfortunately, it was still pretty bright where my table was located, so only a few “pixels” could be seen at a time.  The video in this post is Read more »

Maker Faire Display Setup Time-Lapse and Ideas

Saturday, I displayed some projects that are discussed fully in this post.  I thought it would be cool to take a time-lapse of my table being set up using my DIY GoPro mount.  It took less than an hour to get everything going, but I’d done quite a bit of preparation in the days before to make things easier.

As far as the video goes, I really like at the end, when everyone is talking and the light graffiti device and cigar box “creepster” seem to be following right along.

If I met you at the event, I’d invite you to leave a comment on this article to say “hello.”  The event wasn’t crowded the whole time, but seemed to get busy in waves. If I wasn’t able to talk to you in person, sorry about that.  After the “read more,” I’ve put some ideas for having a great display at a Maker event like this, as well as some photos of my booth. Read more »