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8 Jun 2011

Micrel has announced the availability of the MIC4811 High Current 6 Channel Linear WLED Driver with DAM™ and Ultra Fast PWM™ Control.

The MIC4811/MIC4812 are high efficiency linear White LED (WLED) drivers designed to drive up to six high current WLEDs for signage lighting. The MIC4811/MIC4812 provide the highest possible efficiency at low source voltages as this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. These linear drivers maintain constant current for up to six WLEDs and feature a typical dropout of 100mV at 50mA (MIC4811) and 190mV at 100mA (MIC4812).

The MIC4811/MIC4812 feature Dynamic Average Matching™ (DAM™) which is specifically designed to provide optimum matching across all WLEDs.

The datasheet and evaluation board schematic can be found on the Micrel website.

MIC4811: High Current 6 Channel Linear WLED Driver with DAM™ and Ultra Fast PWM™ Control - [Link]

7 Jun 2011

Custom RGB LED Turn Signals for My Car @ Starfire’s Tech Blog [via] .

Just wanted to throw this up here. Been working on some RGB LED turn signals for my car (2008 Mustang GT/CS) I’m using the Adafruit pixels http://www.adafruit.com/products/307 for them, there are 35 in each light. Why you may ask? First off why not! Second I take my car to cay shows and just like to have someone unique that I made myself. Third I had bought some LED bulbs that were advertised to match the stock headlights in color but they are far from it, they ended up very blue like a typical white LED, I was guessing they used warm whites but I was wrong so after making some tail lights for my dads car I figured why not do the same to mine. Anyways here is a video that give info and how they look, I’ll post more as they come along. (Picture of car at end of video!)

Custom RGB LED Turn Signals For Car – [Link]

6 Jun 2011

Electronic business card / scroll display. 85 SMD 0805 led’s matrix display, Atmega88V uController, and couple of other smd parts. Dimensions are 24mm x 85mm, supplied from 3V small coin battery. It will work for long time, even on discharged battery (2V). After button is pressed, device is waking-up from power-down mode and start scrolling text equivalent to pressed button. 4 text’s are saved in eeprom memory, each one can be 127 character length (128 cell is used for holding special end-char).

Elektronic business card 85 LED – [Link]

6 Jun 2011

High-power flashlight version of TV-B-GONE (v1.2). It uses 1W infrared emiter diode, 940nm wavelenght. Note that other wavelenght (like 850nm) will strongly decrase range of device. Led requires a collimator, i have used 25*. Note that if you want to shoot from higher distance you must put a 15*, and 45* for switch-off mane tv’s at once. Supply as in original flashlight, 3x AAA batteries. Resistor R1 is for region select, solder for EU or leave-it for US. PCB diameter is 20mm, can be sawn to 18mm.

High-power TV-B-GONE flashligt – [Link]

6 Jun 2011

3W RGB mood lamp, a “mylonit” lamp from ikea. Powered from TNY245 based AC-DC converter. Next is Attiny13 based RGB driver, it not only can change colors, but has 3 modes and an automatic color and mode saving to eeprom memory – so after power up you always will see last seen mode and color.

3W “mylonit” RGB mood lamp - [Link]

4 Jun 2011

Robert Davis writes:

I have obtained two Silent Radio LED signs on Ebay and I intend on rebuilding them. To get one of them apart I had to reach through a hole in the back and cut the wires to the power transformer. To remove the logic board I had to use pliers on the screw head and pliers on the mounting shaft. In one case the screw broke off rather than come out. Tin sheers or heavy duty wire cutters can be used to remove the connectors between the sign and the logic board.

Arduino LED Sign - [Part1]+[Part2]+[Part3]

31 May 2011

Andy from the UK was looking to build a simple proof of concept project which would integrate an Arduino and ENC28J60 based ethernet shield (or a Nanode) to connect with his Pachube account to control an RGB LED. [via]

He says:

This article describes a simple application to demonstrate the ENC28J60 EtherShield library. It can be run on a plain Arduino or clone and an ethernet shield based on the ENC28J60 ethernet chip (Note: This is not the same as the official ethernet shield). An alternative is to use the Nanode (see the wiki site at Hackspace) which combines the arduino and the EtherShield into a single compatible board. It also demonstrates the network capability of the board and the control functionality included in the Pachube dashboard application.

Pachube controlled RGB LED – [Link]

30 May 2011

voltsandbytes.com writes:

This microcontroller project is another version of a persistence of vision or POV toy. It has 8 LEDs and it is powered by ATtiny2313 (AVR microcontroller by Atmel) operating at 2 x AA batteries. This is a tiny toy and it can be carried easily inside your pockets.

tinyPOV – Yet Another AVR POV Project – [Link]

29 May 2011

www.microsyl.com writes:

After I made my Kitchen Mood Light, I had another idea for 3W RGB LED’s. My idea was to make a simple lamp with 3W RGB LED’s, controlled by a MCU, and have an IR remote control to change the color, effects and patterns.

Mood Lamp – [Link]

29 May 2011

microsyl.com writes:

At the beginning this project was to buy a led sign to interface with my home automation network. This automation network display information like temperature, wind speed, humidity, etc. I had bought on EBay a LED Sign but when I received it I got a surprise! There was no serial port to program messages… After a couple of days, I look inside to see how it was built.

LED Sign with MMC Memory card – [Link]





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