Wire-wrapping an LED matrix

Regular reader [Osgeld] built a 1024 LED display matrix. This is a proof-of-concept design and he admittedly has overloaded the components. Most notably, the 595 shift registers (featured over the weekend) are sourcing too much current if all eight pins are active. That’s easy enough to fix in the next design by moving up to cascading LED drivers. Instead of soldering every connection in the display, [Osgeld] soldered the components in place and then used wire wrapping to make the point-to-point connections. This must have saved him a ton of time and frustration. We can’t wait to see what comes out of this first prototype.

Laser Command game uses laser for control

[Eliji Hayashi’s] project for a class at Carnegie Mellon University is absolutely delightful! It is a game he calls Laser Command because a laser pointer is used as the gaming controller. An 8×8 LED matrix serves as the display, but is also used as an 8×8 light sensor, much the same way as the LED advent project did. The display is rapidly switched between producing light and sensing it. The laser is bright enough that it becomes easy to pick up the voltage generated within the matrix during the sensing periods. The game is programmed on an Arduino mini and the whole thing wraps up into an incredibly small package. Brilliant.

[Thanks Juan]

LEDs invade coffee table crevice

That’s a lot of LEDs, and a little bit of glass cleaner. [Tobias] spiced up his IKEA coffee table by adding 6144 LEDs. This is a larger realization of SparkFun’s LED coffee table which used 64 8×8 modules. [Tobias] sourced three display boards from Sure Electronics for a total of 96 8×8 modules. These boards are addressed through a serial interface; four serial lines for each board but a shared data bus for each of the row select pins and the data/latch/clock pins.  This method uses 19 of the 20 pins on the Arduino that drives the display. After the break you can see a demonstration. If this is more than you need there’s always the 112-LED and 81-LED table projects that can produce a full color range. Continue reading “LEDs invade coffee table crevice”

Update: most interesting game in 64 pixels

[Brad] has continued working on the Super Pixel Bros game. We saw a glimpse of this a few months ago but he’s added a lot since then. The game now has enemies; one type is similar to Bullet Bill, another type drops from the sky and walks toward you, kind of like a Goomba. Game play is quite responsive and it’s amazing what he has accomplished with such low resolution. In the video after the break [Brad] mentions that a friend is working on sound effects for jumps and block breaking. We’re assuming that the audio track in the background is already coming from the LEDBOY speaker.

Which reminds us, if you haven’t checked out the hardware, do so now. That enameled wire mess makes us shudder just a bit. There many be a kit version coming that will save you the point-to-point soldering madness. If that’s part of the fun for you keep an eye out for the forthcoming release of the hardware schematics.

Continue reading “Update: most interesting game in 64 pixels”

Arduino helps you ski Copper

[Dwight’s] been working on a long-term project to add a status board for the ski runs at Copper Mountain ski resort. The board will feature an 8×8 LED module for each run that displays a green O for open trails, a green G for groomed trails, and a red X for closed trails. He’s also got a status board with LEDs embedded in a trail map.

The system relies on SPI for each LED module. An Arduino Mega uses a Xbee module to pull down XML data wirelessly and display it on this board. Since the trail report is already available online it’s just a matter of parsing the data in a useful way.

He’s not quite done with the whole thing yet, but keep an eye out for it if you are planning to ski Copper Mountain.

[via Tom’s Guide]