AmbilightUSB

Hi, strangers!

Project update Lightpack: Bleed and open

This story is about how to make a super mega cheap and simple ambilight backlight for your computer. The ATtiny44 microcontroller will act as a conductor, and 4 RGB LEDs will play the role of an orchestra.
')
Several pictures in order to arouse interest:



Too lazy to read: a full description in the "pictures" (=
UPDATE: Added video http://www.youtube.com/watch?v=tdp1QeS_JCg
UPDATE2: clarified the name of the used microcontroller in the parts list (ATTINY44-20SSU)
UPDATE3: added fyuzy (wildly sorry that I forgot about them)
UPDATE4: fixed schematic diagram (v2.1.3)



The writer is not very good of me, so let's get straight to the point:

Parts List

Component	Body / Size	amount
ATTINY44-20SSU	SOIC	one
74HC595	SOIC	2
RGB LED	SMD 5x5mm	four
Resistor 10k	0805	one
Resistor 1.5k	0805	one
Resistor 100R	0805	12
Resistor 68R	0805	2
Resistor 0R	1206	one
Cap tantalum 4.7uF	1206	one
Cap ceramic 20pF	0805	2
Quartz 12Mhz	HC-49 / US	one
Zener diode 3.6V	MiniMELF (1206)	2
MiniUSB	Type B (SMD)	one
PLS-40S	Dip	one
Plume	~ 0.3 m	5 wires
Glass fiber	~ 160x80 mm	one
Double sided tape	fat	one

Total: not more than 500 rubles.

The device is glued to the laptop with double-sided tape:

Probably not ice, but it completely suits me, keeps dead, usb can be connected, disconnected without holding the board. If you peel off, remain stains that are easy to polish with emery cloth erased with wet wipes. In general, they do not bother me, the size of the boards allows you to not soared about this.



The microcontroller is connected to the computer via USB. The foundation of the project is obdev V-USB library . The first thing that was tested, tested and immediately worked is v-usb / examples / hid-data. HID works everywhere, drivers are standard, working with this class of USB devices is very simple. Moreover, we have already done all the work for us, in the example of hid-data you can find the files hiddata.c and hiddata.h. They implemented a standard interface for working with USB HID for windows (win api) and unix (libusb).

Soft captures 4 areas of the screen, converts to 4 points and sends to the device, breaking into color components Red, Green, Blue. Everything within C ++, Qt and USB HID.




We make the AmbilightUSB.lay board (the current version is hw v2.1), soldered.
Fusion flashing:
avrdude -pt44 -cusbasp -u -Ulfuse:w:0xee:m -Uhfuse:w:0xdf:m -Uefuse:w:0xff:m

And fill the firmware AmbilightUSB_v2.8.hex
avrdude -pt44 -cusbasp -u -Uflash:w:AmbilightUSB_v2.8.hex:a

Connect with USB cable A to miniUSB B:

Excellent iron is ready!

Installation, software setup

If we use Win32 (Windows XP), we add Qt, gcc, mingw ( download ) and the latest version of the software ( AmbilightUSB_v2.7.7.exe ) in one folder. Run and rejoice (=

For Ubuntu x86_64:
1) Download AmbilightUSB_v2.7.7
2) Check / $ sudo apt-get install libqt4-gui Qt4: $ sudo apt-get install libqt4-gui
3) Run: ./AmbilightUSB_v2.7.7

Latest versions are available in downloads .

The application immediately after launch minimizes to tray:



Double-click on the icon in the notification area toggles the state on/off .

Tested on Ubuntu 10.04 (x86_64) and on Windows XP (x86):



The width and height of the captured areas is very easy to adjust, you can adjust to the resolution of the film. By the way, I immediately answer the question “Why are there no LEDs on top?”, All films are mostly widescreen and the top of the screen is dark, so I thought that this was not necessary. True, if you really want, you can relatively easily add shift registers and LEDs. With iron, everything is simple, but the firmware and software will have to be finished =)



Building from sources (Qt4, gcc)

0) Check / install Qt4
$ sudo apt-get install libqt4-dev
$ sudo apt-get install libqt4-gui
1) Download source from github:
Latest version from repository: tar.gz or zip
Or the entire project tree: $ git clone git@github.com:brunql/AmbilightUSB.git
2) Extract the tar.gz or zip archive:
tar xzvf brunql-AmbilightUSB-v*.tar.gz
unzip brunql-AmbilightUSB-v*.zip
3) Build:
$ cd {path/to/AmbilightUSB}/Software/
$ ./update_locales.sh
$ qmake AmbilightUSB.pro
$ make
4) Run!
$ ./build/AmbilightUSB

Logs are written to the following files:
Linux: ${HOME}/.AmbilightUSB.log
Windows: C:\Documents and Settings\UserName\.AmbilightUSB.log

Settings are saved here:
Linux: ${HOME}/.config/brunql.dev/AmbilightUSB.ini
Windows: C:\Documents and Settings\UserName\Application Data\brunql.dev\AmbilightUSB.ini

To reset the settings in default, simply delete the AmbilightUSB.ini file.

Interface: English, Russian

Sources on GitHub , all sorts of things in downloads .

Similar projects

Ardulight Background Illumination Ambilight TV
MoMoLight: YouTube and description .
Ambilight 4PC
On habre: How I wanted to do Ambilight for a mobile phone and what came of it

Thanks for karma habrauser: Toseter , etc , crac , Shpankov , UFO

Please send all ochepyatki in a personal or e-mail: mike.shatohin [at] gmail.com