Computer controlled RGB Lamp Board      Computer controlled RGB Lamp heatsink

This project teaches you how to build a lamp that can change color, and can be controlled by a computer. Simple Python and C programs for your PC or Mac are provided that let you program color patterns into the lamp. Implementing the weather forecast and other ideas are then up to you. Web scraping with wget is easy if you understand a scripting language. The whole project should cost under 100 euro, half of which is for the lamp (glass ball, LED module, microcontroller, and odds and ends), and the other half for the flash programmer if you don’t have one. So considering you already have a programmer, the project should not set you back too much.

Computer controlled RGB Lamp: [Link]

April 24th, 2008

RGB LED Email Notifier

 RGB LED Email Notifier in action
Remember the Gmail Light Cube notifier ? This is another project that displays the status of your email inbox, but this time trough an RGB LED. So you can setup 3 types of email notifications like work email in red, newsletters in green, other in blue. The color and characters are controlled trough RS232 by a Python script that runs as a scheduled task every 10 minutes, and the circuit is powered by a Picaxe 08M. The author didn’t provide a link for source code download, but he writes that he will send the code to anyone who asks.

RGB LED Email Notifier: [Link]

April 5th, 2008

VGA to SCART RGB converter

VGA to SCART RGB converter

This is a simple circuit to connect your VGA graphics card to your TV. The advantage of using RGB over S-Video is superior contrast and clarity. The schematic of this circuit is taken from Tomi Engdahl’s site. The circuit basically XORs together your horizontal and vertical synchronization signals to create a composite sync output, and adjusts output for input polarity. By setting the resolution and timings on your VGA card correctly, it is possible to generate a signal that the TV will accept. This circuit works for both PAL and NTSC signals, just adjust the timings in software accordingly. To see which timings to use, this site has a list. If it doesn’t work, experiment a bit. The resolution should normally be 720576 for a PAL tv. The refresh rate should be 50 Hz interlaced. Use Powerstrip to set the timings after you’ve set the resolution to 720576.

VGA to SCART RGB converter: [Link]

April 2nd, 2008

RGB LED driver

  RGB LED driver : rendered PCBRGB LED driver : rendered PCB

The following project allows you to easily control an RGB LED. All signals are buffered and passed through for good performance over long cables and daisy chaining many devices. Many ShiftBrite devices can be controlled from any type of controller that supports clocked serial data output, which is practically all microcontrollers and even PC parallel port or FTDI bitbang adapters.

RGB LED driver: [Via][Link]

April 2nd, 2008

16×24 RGB LED Matrix

16×24 RGB LED Matrix

The most significant part used in this project is Texas Instruments’ TLC5940 LED PWM driver. It uses a clocked serial data input, and provides 12 bits of PWM resolution on each of 16 outputs.

Normally, the TLC5940 would require one output for each LED element. Since there are three elements per RGB LED, this would add up very quickly; the planned array would require 3 * 24 or 72 TLC5940 chips.

1624 RGB LED Matrix: [Via][Link]

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