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Thursday, February 16, 2012

A new generation of media players

 

Measy X5 - 3D Media and Internet Player and Streamer

 

What's so great about this Player?

  • Realtek 1186 - 40% faster than older 1073 / 1283 chipsets

  • Internet Browser. - Android 2.2

  • FaceBook, Twiter, Picassa APPs

  • Youtube XL - Watch HD Youtube videos on your largescreen TV

  • Bit Torrent Download without PC

  • USB 3.0 support - 10x Faster Speeds as compared to USB 2.0

  • Gigabit Lan Support - 10x Faster than 10/100 Lan. Seemless 1080P videos over ethernet.

  • Supports USB Keyboards.

  • Supports BD ISO

  • Supports 3.5" Internal HDDs - Lower Cost compared to 2.5" HDD

Thursday, February 9, 2012

iPhone processor found: 620MHz ARM CPU

The iPhone's got a 620MHz ARM chip running under the hood. Specifics:

  • ARM1176JZF chip with Trust Zone (enables trusted computing environment for media, apps, network, OS, etc. -- very bad for hackers)
  • Can vary in clock speed up to 700MHz or more, depending on implementation
  • ARM Intelligent Energy Manager (claimed to reduce power consumption 25-50% in portables)
  • 16K / 16K cache
  • Features vector floating point coprocessor ("for embedded 3D-graphics")
  • ARM Jazelle enabled for embedded Java execution (hmm...)
  • SIMD, high perf integer CPU (8-stage pipeline, 675 Dhrystone, 2.1 MIPS)
  • 0.45 mW/MHz power draw (with cache)

Whatever it is Apple's got that thing doing, they're doing it right. Thus far our iPhone battery life tests have far exceeded expectations (more on that soon).

Update: Sascha at Gear Log seems to think given the recently discovered Samsung chip in the iPhone, perhaps the processor in question is a Samsung S3C6400, a recently-produced 667MHz ARM1176JZF-based CPU that seems to fit the bill.

How to Set Up Windows 7 Homegroups for Seamless, Instant Sharing Between PCs In Your Home

How to Set Up Windows 7 Homegroups for Seamless, Instant Sharing Between PCs In Your Home

 

You may have heard of Windows 7's Homegroup feature before, but never really understood what it did. It's actually the simplest way to share files between two Windows machines, and it takes seconds to set up. If you have more than one computer in your home (or a friend who comes over and likes to borrow your music), here's how to set it up.

Sharing files in Windows used to be a painful process, and while that system still exists, homegroup is dead simple to use. All you need is a copy of Windows 7 Home Premium or above (which most people should have) to start the homegroup. Any computer running Windows 7 can join the homegroup. To set it up:

How to Set Up Windows 7 Homegroups for Seamless, Instant Sharing Between PCs In Your Home

  1. Open up the Control Panel, go to Network and Internet, and click on HomeGroup. You can also type "homegroup" in the Start menu's search box.
  2. Click Create a Homegroup if one isn't already set up. When you first join your home network, it may have already created one for you, in which case you should already see most of the following options on the main Control Panel page—no need to go through the wizard.
  3. First, the wizard will ask you what you want to share with the other computers in your house. You can share your Pictures library, your Music library, your Videos library, your Documents library, and any printers hooked up to your machine. You can't choose specific folders on your machine to share with Homegroup, but you can add them to one of those libraries to get it sharing.
  4. Next, it will give you a password to write down. For now, you can ignore this, since we're going to set the password ourselves. Click Finish.

     

  5. Under "Other homegroup actions" on the Control Panel page, click "Change the password". Now you can just enter any password you want.
  6. Now, on your other computers, head to the same Homegroup window in the Control Panel. It should tell you that it's detected a homegroup on your network. Click "Join Now", select the files you want that computer to share, and type in the password you just set.
  7. You should see Homegroup pop up in Explorer's sidebar, from which you can access all the shared libraries from other Windows 7 computers in the homegroup. That's it!

After typing in that password on all your Windows 7 machines, you'll be able to access any files on those machines right from Windows Explorer. If you have a friend that comes over and wants a file, you can just give them the password to your homegroup (though they'll need to mark your Wi-Fi network as a "Home" network, which is fine).

To print a document on a shared printer—that is, a printer connected to one of the other homegroup computers—all you need to do is go to the print dialog as normal. You should see that the shared printer pops up under the "Select Printer" list (in fact, if you don't have a printer hooked up, it'll already be set to the default). Just hit Print and it'll send it to that shared printer without so much as a blink.

You can also turn on Media Streaming from the main Control Panel page, which lets you send your music, pictures, and videos to other devices via Windows Media Player. I've never found a need for this feature since I can access the videos just fine via Windows Explorer and open them up with PotPlayer, our favorite video player for Windows.

The only real downside is that it only works on Windows 7. If you have Mac or Linux computers in the house, you can't join the homegroup, per se, but you can still access shared homegroup files using this method. In an all-Windows household, though, it doesn't get any easier than this.

Monday, January 30, 2012

Home Theater Design

Here are some DIY Home theater Designs which will blow your minds off…..

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Sunday, January 29, 2012

DIY Center Channel Speaker with HiVi F5 / SD1.1A

General Info:

  • Four - HiVi F5 Kevlar MidBass Drivers
  • Two - HiVi SD1.1A Dome Tweeters
  • Fully Shielded
  • 170 watts RMS @ 4ohms
  • 2nd / 3rd Order crossover at 4kHz
  • Frequency Response: 60Hz - 20kHz
  • Overall Dimension: 43"x 7"x 14"

The enclosure design for the center channel is shown below.

HiVi F5 / SD1.1A DIY Center Channel Speaker Enclosure Drawing

Figure 1: HiVi Home Theatre Center Channel Speaker Enclosure Drawing

 

The crossover design for the center channel speaker and the modeled frequency response is shown below.

HiVi F5 / SD1.1A Crossover Schematic

Figure 2: HiVi Home Theatre Center Channel Speaker Crossover Schematic

2-Way Crossover Network
Low-Pass (LP) Filter: 2nd-Order Butterworth, Corner Frequency: 4000 Hz
High-Pass (HP) Filter: 2nd-Order Butterworth, Corner Frequency: 4000 Hz

C1 = 3.3 uF, Polypropylene, 0.00764 ohms
C2 = 8.2 µF, Polypropylene, 0.00548 ohms
C3 = 15 µF, Polypropylene, 0.0048 ohms L1 = 0.27 mH, Air Core(#18), 0.215 ohms
L2 = 0.13 mH, Air Core(#18), 0.16 ohms
Woofer Impedance Equalization Circuit
Req = 2.4 ohms
Ce = 25 uF
L-Pad Circuit: 1.32 dB
Rp1 = 0.51 ohms
Rp2 = 5.1 ohms

HiVi F5 / SD1.1A Center Channel Model Response

DIY Center Channel Speaker Construction

The center channel enclosure construction is shown in the photographs below.

HiVi Center Channel Speaker Box Assembly

HiVi Center Channel Speaker Enclosure

HiVi F5 / SD1.1A Cross Over

HiVi F5 Kevlar Midwoofer / SD1.1A Tweeter

 

The finished center channel cabinet is then primed and painted using several coats of an oil based epoxy paint and then finished with red oak trim.

 

HiVi F5 / SD1.1A Center Channel Speaker

DIY HiVi Home Theatre Speakers

Photograph 6: DIY HiVi Home Theatre Speakers

7" LCD DIY Projector

This is a 7” Projector using a 80W LED 7000lm with 36V@2.8A of power source. Here below are the components used:

LCD : Innolux 7" LCD
Fresnel's : f120mm / f220mm
Projection lens: f265mm triplet
Condenser Lens: f127mm condenser
Light Engine: 80W HP-LED (arrangement 8x10, [1 led is 0.35A and 3.6v max])
LED Driver: 110W constant supply (variable to adjust 50W-110W max)
Heat sink (Fans
12V supply for LCD

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This one is 14.5" X 9.5" x 5.5" internal dimensions, straight through setup.
Projected image 80" diagonal at 9ft

 

Here's the picture my parts to be use.

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