lcd

334 Articles

Multi-touch LCD From LEDs

October 10, 2009 by 8 Comments

[youtube http://www.youtube.com/watch?v=BiJsBaBAUL4%5D

[Thomas] promised nearly a year ago he would give the community code and schematics of how he made his LED Multi-touch panel, but we would have to wait for his next version first. Well its finally here, bigger and better then we could ever have imagined. His new version is organized as a 48 by 32 matrix of 1536 LEDs, but he’s gone further by placing it behind a stripped LCD to make a multi-touch display. It doesn’t seem nearly as fast or accurate as the original, but potentially could be more portable than ones we’ve seen before. And yes, this time around he included how his LED matrix is made.

How To Generate Font And Picture Header Files

September 29, 2009 by 19 Comments

custom_fonts_displayed

Displaying custom fonts or images on an LCD screen using a microcontroller usually requires quite a bit of work. We’ve used some readily available tools to make this a bit easier for your next project. Our python script will convert BMP files into a header file ready for use with AVR microcontrollers. We’ll walk you through it after the break. Continue reading “How To Generate Font And Picture Header Files” →

BBox MIDI Drum Sequencer

September 14, 2009 by 10 Comments

bbox

We’ve covered sequencers before, but reader [Johan] sent in his latest project that is much more minimalistic approach. Dubbed the BBox, he based his drum generator on an Arduino and an LCD display. Rather than synthesizing sound, the Arduino just outputs MIDI which is then interpreted by his Roland Juno-D. In building the device he used a favorite trick of ours to keep the interface clean. He then found an awesome banana box to use as a case. Although, the project may not be as functional as some of the others out there, it certainly has flair. Video of it in action after the break.

Continue reading “BBox MIDI Drum Sequencer” →

Digital Camera LCD Replacement

September 8, 2009 by 11 Comments

digital_camera_lcd_replacement

Turning on your camera to this kind of black blotch will ruin your day. Cracked LCD screens have got to be the biggest digital camera killer out there. Although you can still take pictures with it, a non-functioning screen makes it difficult if not impossible to change settings and take decent photos.

[myles_h] has document the process of replacing a broken screen in his digital camera. As professional repair usually costs more than a brand new camera you’ll want to do this yourself. New screens can be purchased online, but we’ve also considered buying the same model of camera from ebay (screen intact but broken in a different way). This model, a Sony Cybershot DSC-W50, has fairly easy access to the LCD and its connection to the logic board. Before buying parts, you may want to investigate how much disassembly your camera will require.

CBS To Advertise Using Video-in-Print Technology

August 21, 2009 by 54 Comments

[youtube=http://www.youtube.com/watch?v=fgJ6DA50thw]
In what seems like another move to blur the line between digital and print media, CBS has announced that they will be introducing something called Video-in-Print technology in next month’s issue of Entertainment Weekly. Video-in-Print, or ViP, technology consists of a small LCD screen and circuit board that can be inserted into print media and play video and audio content. CBS is using the ViP technology to promote their fall prime-time television lineup. Video-in-Print technology is the brainchild of Americhip, a company that claims to specialize in multisensory marketing. The ViP player in next month’s issue of Entertainment Weekly incorporates a 320×240 resolution TFT LCD screen and a rechargeable battery lasting 50-60 hours. The battery can be recharged via the player’s on-board mini USB port. While this isn’t the first time that we’ve seen a magazine do something like this, as far as we know this is the first time that anyone has put a video player into a magazine. That being said, there seems to be no indication whether or not CBS will make it easy for us to modify the ViP player’s software like Esquire did with their e-ink display. We’re not entirely sure what we’re going to do with the ViP player, but the fact that it has a mini USB port gives us some interesting ideas. Juicebox, anyone?

Parts: 4×20 VFD Character Display (NA204SD02)

July 13, 2009 by 24 Comments

futuba-serial

Futaba makes vacuum florescent character displays that can be used as a drop-in replacement for common character LCDs. VFDs have a wider viewing angle, and generally look cooler.

Futaba’s character displays can be interfaced using the standard 8-bit or 4-bit parallel LCD interface, or a simple two-wire protocol. The protocol type is set by resistors on the back of the display, so it’s not particularly easy to change without a hot-air rework station. Today we’ll demonstrate a serially-interfaced VFD using the Bus Pirate.

Continue reading “Parts: 4×20 VFD Character Display (NA204SD02)” →

IDisplay, Webcam Multitouch

June 26, 2009 by 32 Comments

[youtube http://www.youtube.com/watch?v=mlLY0zic7u0%5D

Embedded above is an interesting multitouch demo by [Lahiru]. The goal of the project was to find an easy way to retrofit current LCDs for multitouch. Instead of using infrared or capacitive recognition, it uses a standard webcam mounted overhead. To calibrate, you draw polygon around the desktop screen as the webcam sees it. The camera can identify the location of markers placed on the screen and their color. iDisplay can also recognize hands making the pinch motion and sends these as touch events via TUIO, so it works with existing touch software. It’s written in C++ using OpenCV for image processing with openFrameworks as the application framework.

[via NUI Group]