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18 Oct 2010

Input Voltage: 10.5-16V DC
Input Current: 11-150mA at 12VDC
Resistor with 1K adjust brightness.
24 ohm resistor current max limit current to 20mA in each group of LEDs.

Dimable Led lamp – [Link]

16 Oct 2010

This project is a big LED matrix controlled by Arduino board and build inside an IKEA table.

The displays are connected to the Arduino to share the row select pins (A,B,C and D) and the control lines EN, CLK & LATCH. The serial lines R1,R2,G1,G2 have their dedicated pins. So there are 19 pins needed out of possible 20 (not counting the reset pins as I/O). As the displays are loaded in 16 rows a 64bit some transformation has to be done while loading the display.

LED matrix Arduino IKEA Coffee table hack - [Link]

16 Oct 2010

powerRGB is the extension of tinyRGB to drive high power LED’s. It is using 3 N-Channel HEXFet Mosfet’s to drive the LEDs and uses the same microcontroller and software than the tinyRGB. Learn how to calculate the resistors on the link below.

powerRGB: Power RGB Led controller – [Link]

16 Oct 2010

This project is a RGB led controller based on Attiny15L microcontroller. It is the easiest way to control a RGB Led. The software is written in Assembler. Timer 0 is used to generate interrupts at about 30kHz. This interrupts are used to build a 8bit PWM. Timer1 is used to change the color pattern.

tinyRGB: Attiny15L RGB Led controller – [Link]

16 Oct 2010

This project shows how to turn a DC-DC converter to a constant current source able to power some LEDs. It uses the TPS54232 step down dc-dc converter and the author started by reading the SLVA374 app note from TI which is a Step-Down LED Driver Design Guide based on the TPS54160 dc-dc converter. Check details of this design on the link below.

TPS54232 constant current source - [Link]

15 Oct 2010

This article guide you through the steps needed to make your first PIC project. It discuss how to make a led blink using a Microhip 18LF25K22 microcontroller on a breadboard. To program the chip it uses a PICkit 3 programmer and shows how to connect the programming header on the breadboard. The example code is available for download to be used with MPLAB.

“Hello, world” blinky light on a PIC – [Link]

14 Oct 2010

This circuit is a analog LED audio VU meter based on LM3915 that is the logarithmic version. Each LED operates with a 3dB difference from the previous one and a jumper is provided to allow dot or bar mode. This is ideal as power meter on amplifiers.

LED Audio VU Meter - [Link]

14 Oct 2010

This project shows how to build a multi node LED PWM Lamp Controller based on 12F609 microcontroller. Multiple lamps can be connected together to make large strings of light. The controller provides four full channels of PWM control

A Multi Node LED PWM Lamp - [Link]

14 Oct 2010

This project shows how to build a LED lamp that synchronizes with the beat of the music. It uses some blue LEDs that pulses with the bass of the music and it is powered from 6V old Nokia charger. Check details on the link below.

LED Music Sync Lamp – [Link]

11 Oct 2010

This project shows how to build a RGB Led lamp using TI MSP430 Launchpad board, a RGB Led, three resistors and a potentiometer. Code is written in mspgcc and PCB is designed in Eagle. Turning the potentiometer colors moves smoothly through hues.

MSP430 Launchpad RGB Led Lamp - [Link]





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