Hack a Day » makerfaire2008

LED coffee table

Eliot — Sun, 14 Sep 2008 01:05:50 +0000

Spark Fun’s centerpiece at Maker Faire back in May was this LED coffee table. They just recently posted about how it was constructed. The surface is made from 64 8×8 RGB LED matrix boards totaling 4096 LEDs. The eight rows are connected to a custom router board so that one SPI line can control the entire display. The main microcontroller is an Olimex LPC2106 dev board. It runs a four player cooperative pong game where multiple balls are added over time. Each player gets a classic Atari paddle for control. You can see a video of the table running a screensaver after the break.

3D mineral printer

Eliot — Mon, 08 Sep 2008 00:11:52 +0000

The last few days many people have been talking about the USC’s contour printer. It’s a device that prints concrete outlines with the hopes of eventually printing entire houses. Caterpillar has decided to back the initiative.

It reminded us of a project we came across at Maker Faire. [Leif Ames], [Matthew Bowman], [Marides Athanasiadis], and [Terrell Edwards] built a 3D Mineral Printer as their senior engineering design project at UC Santa Cruz. The printer works by first laying down a layer of dry concrete powder. It then selectively wets the powder where it wants a solid form. The reaction doesn’t require air to dry, so the next layer can be applied immediately. The printer only creates contours and the team imagines this being used to create temporary casting molds. The build envelop is nearly a cubic meter. When we talked to them, they were experimenting with many different types of material mixes. A video of the first test is after the break.

Maker Faire 2008: Schwag

Eliot — Sun, 11 May 2008 04:15:00 +0000

As our final Maker Faire post, we thought we’d talk about some of the curious items that were handed us during the event.

While checking out Evil Mad Scientist Laboratories‘ latest generation CandyFab were given their AVR business card breakout board.

[Garrett] gave us a handful of ShiftBrites to play with in a future project.

We donated to the EFF, as we’re wont to do, and received a super bright blue flashlight for spotting the yellow tracking dots on color laser printouts. If you’re not familiar with this topic, you should check out bunnie’s blue light scanner.

Our final stop was at ifixit to pick up a free set of spatulas (spudgers?) for popping open iPods. All around a decent haul.

Maker Faire 2008: Puzzlemation

Eliot — Sat, 10 May 2008 04:00:00 +0000

[John Peterson] showed us his Puzzlemation, animated tile puzzle at Maker Faire. It was originally designed for the Microchip 16-bit Embedded Control Design Contest. The puzzle is made from multiple modules each with an 8×8 LED grid. The tiles are battery powered and each one has PIC24FJ64GA004 microcontroller. They sit on a tray with flat copper strips as a serial bus. The tray controller broadcasts the animation to the tiles. Each tile waits for its unique identifier and saves that portion of the animation. The tiles don’t actually know what order they’re in so once the animation is in motion you can figure out their proper order; rearranging them so the animation is correct. We’ve got a video of it in action after the break.

Maker Faire 2008: RoboGames and warships

Eliot — Fri, 09 May 2008 11:10:00 +0000

Today’s episode of BoingBoing TV comes straight from Maker Faire. The first segement is about RoboGames arena combat. The second segment covers a favorite exhibit of mine. Western Warship Combat Club brought their 1/144th scale battleships to fight it out in a large pool. The RC boats fire ammunition up to 1/4-inch ball bearings and the even feature bilge pumps to keep them afloat. Scoring is based on where on the hull the strike happens. Here’s a direct link to the mp4.

Maker Faire 2008: ShiftBright RGB LED module

Eliot — Fri, 09 May 2008 03:00:00 +0000

We made a point to stop by [garrett]‘s booth at Maker Faire to to see what he had been working on. You may remember him from his random caps locker shenanigans. He’s just recently released the ShiftBright RGB LED module which makes it easy to implement a string of individually addressable LEDs. The module is based on the Allegro A6281 3-Channel Constant Current LED Driver. The driver chip is capable of displaying a billion colors using an RGB LED. The 3x3mm package is mounted to the backside of the board while a bright common-anode RGB is mounted to the front. The modules are designed to be daisy chained together and are individually addressed using a serial interface. You can find Arduino example code on the site and more info on how the item was developed. Read on for close up images.

Mechanical white board

Eliot — Fri, 09 May 2008 01:00:00 +0000

[Romado12187] just posted a walkthrough of his mechanical dry erase board project on Instructables. It was on display in the Microsoft booth last weekend at Maker Faire. Unlike [sprite_tm]‘s version we covered earlier, this one is built more like a traditional pin plotter. The construction was done entirely in [Romado12187]‘s dorm room and uses plywood and PVC pipes for the majority of the frame. The mechanical components were purchased from SDP/SI and the controller hardware are Phidgets. He included a joystick, but it also has a C# command line program for control. [Romado12187]‘s write up also has a lot of improvements to help make your first attempt better than his; buying a premounted board and being very exact in calculating motor power are recommended. Catch a video of the plotter in action after the jump.

Maker Faire 2008: Electric motorcycles

Eliot — Thu, 08 May 2008 05:15:00 +0000

Builder [Justin Gray] brought a pair of electric motorcycles to Maker Faire last weekend. Pictured above is the R84, which has 28 LiFePo cells and an 84v AC induction drive providing 54HP. All of that is stuffed in a 2000 Yamaha R1 frame. You can buy it now for $14,000.

The second bike is dubbed the R144. It’s a144v DC system with 48cell lithium power supply driving a 60kw series motor.

[Justin]‘s other passion is building fire robots like Libby pictured below.

Maker Faire 2008: SWARM

Eliot — Wed, 07 May 2008 04:30:00 +0000

SWARM is a large scale kinetic art project. The electrically powered spheres move by shifting the batteries around the center axle. By tilting the central ring, th orb can steer as well. The SWARM members are currently radio controlled, but the plan is for them to eventually receive commands from a mother node. More information about the orbs’ design is available on the project wiki. A video of the wobbly buggers in motion is embedded after the break.

Maker Faire 2008: Stribe music controller

Eliot — Tue, 06 May 2008 05:20:00 +0000

We saw a lot of interesting gear at Maker Faire last weekend and thought we’d highlight some of those projects this week. [Josh Boughey]‘s Stribe was originally inspired by the monome 40h. It features of 16 columns of 64 LEDs for a total of 1024 individually addressable lights. Even with all those LEDs, PWM control means it can run off of USB power. 8 spectrasymbol softpots are used between the columns for user input. It’s really quite an amazing feat for being [josh]‘s first board design. All of the circuit designs and firmware are available. Check out Flickr for more photos from this weekend.