Wednesday, January 27, 2010

Electricity from the DEEP: Generate Energy From Earth's Own Heat.

Now Researchers and Engineers from around the world could help to pave the way of generating electricity that produces no greenhouse emissions, and can prove to be a great source to fulfill the world's energy needs. Geothermal energy has been used by humanity for more than 10,000 years. Romans used this energy to produce heat in their spa and it is still effectively used in Iceland. 

The heat energy comes from the Earth's core, a residual energy from Earth's formation. Everywhere on Earth a few miles below the Earth's surface the bedrock is hot and the deeper we go the hotter it gets. This heat from the bedrock has enormous potential to generate electricity as it is available everywhere on Earth and there might be enough of its availability to supply to Earth's energy need.

Water heated by this bedrock comes naturally over the surface in the form of steam. This steam can now be used to drive a turbine and generate electricity.

But places where naturally heated water is not available; the process can be created by digging a very deep well to inject the water into the ground, and an another nearby well is dig to pump that water back to the surface after it has been created by passing the water via hot rocks...


Monday, January 25, 2010

Call Free From Your Cellphone. Make It SIM Free.

We keep on searching for new plans and tarrif rates to make calls at, lowest possible rates. But from now you will stop searching; as I'm going to give you some really cool trick to unlock your mobile and make it SIM free. This trick basically works for Nokia.
Either you can download this software from or just go to this link and give the details of your IMEI which you can get by dialing *#06# choose network and Nokia model number. Now click on the GET CODE button. And that's all. Enter the Code in your cell and Enjoy.

But remember you will have five chances to enter the code. So go on and enjoy. Do comment after Unlocking.

Saturday, January 23, 2010

Extreme Myths About Microprocessor.

In every single day we come across many intelligent devices that has a microprocessor embedded in it. People get passionate over processors more than RAM or Decoders. Every one has their own favorite processor which they like to recommend others and also to use over and over again. Legend and lore surrounds Microprocessor. Some are true but many are just myths which is believed to be true.

  • Few Processor Choices.
This is the most subtle misconception while designing an embedded system that, we are having a choice of only 10-20 32-bit processors. But the fact is there are 100 different 32bit processors available for sale. This counting is not irrespective of different packages and speed; but dozen of companies make different CPU architecture and instruction sets.

  • Intel Rules The World Of Microprocessors.
For lot of people microprocessor means Intel Pentium. The newspaper proclaims that Intel has a 95% share of microprocessor market. This are all media hypes. Intel Pentium has a dominant share of the PC business. But PC contributes to a very small slice of the Microprocessor pie. 
In 98% of the embedded CPU's Intel is not even in the top 5. ARM vendors alone sell about three times of the Intel sells Pentium.
  • Instruction Sets Don't Matter.
Instruction set affect your assembly codes. We go on using instructions as it is meant. We have never thought of Instruction Sets in this context. Whether you use Java, C/C++ or Ada it is ultimately dumped into the hardware. Performance, predictability and power consumption are heavily dependent on the underlying instruction set.
Let us take an example of multiplying two numbers. This is a very easy job and hardly any programmer will worry. But different chips handle multiplication in different ways. Many RISC chip couldn't even do multiplication. So the early RISC compilers had to synthesize their own integer multiplication function. But  it wasn't fast operation. Now the processors have a built in multiply instruction, but not all multipliers are the same. Some chips can multiply two numbers much faster, than the others and it has nothing to do with clock frequency. 
Figure illustrates this phenomenon:-

Hitachi's SH7604 and SH7708 can multiply 32 numbers in four cycles whereas Motorola's 68020 and 68030 take more than forty cycles to do the same.
  • RISC Is Better Than CISC
Both RISC and CISC have their strength and neither is better all the time. RISC chip provides more code density, smaller memory footprints and more mature software tools. But RISC chips have higher clock rates. So the selection clearly depends on your application.

  • JAVA Chips Are Coming.
Java language was never meant to be handled in hardware. Garbage collection, threads, stack orientation, and object management take a megabyte worth of Java virtual machine to translate into something that even the fastest computer of today struggles to execute. Decades of computer evolution and research in companies and universities around the world has failed to produce any thing like Java machine. But java accelerator chips are available. It executes 30% to 60% of Java Bytes into hardware.
  • Dhrystone-MIPS Are A Useful Benchmark.
To understand what DMIPS are; you will first have to understand what exactly a Dhrystone is.  Dhrystone is a synthetic computing benchmark program which represents the general processor performance. The Dhrystone counts only the program iteration completion per second. When Dhrystone is divided by 1,757 then it is represented as DMIPS.(Dhrystone million instruction per second.)
As the instructions are not same from processor to processor so counting and comparing them is meaningless. For Example a same high level task may require more instructions on a RISC machine but may get execute as a single CISC instruction.  
  • Arm Consumes Lowest Power.
In the early ninety's the arm was one of the first 32 bit processor to be embedded into the ASIC's rather than soldered alongside as a separate chip. It was possible because ARM had no cache, no drivers, no outside bus and not much of an instruction set.
But today, there are plenty of 32 bit processors available as ASIC's core. They use even less power both in standby or when they are active.  
  • Higher The Performance Higher The Price.
Cost it what  it is required to built a chip but price is what marketing department wants it to be. Price is determined by market forces and there is no such relation between price and Performance.


Wednesday, January 20, 2010

Make a Bot out of your Toothbrush.

All that you need for these bot is a toothbrush, a small battery and a pager motor. The rest of the construction is very easy and explained in this video. Making a bot was not that easy earlier. So go on and try it out. Do comment if you liked this post and this small project.


Tuesday, January 12, 2010

Firefox Hacks to Improve your Browsing speed.

If you are reading this post that means you are also a Firefox lover like me. And it's very obvious; a browser with so much of versatility and awesomeness needs to be loved. But in some occasions, it can get a bit slower in loading pages; if you are having 7-8 opened tabs spread across 2-3 windows. Oh! those annoying moments. To save you from annoyance here are some cool Firefox hacks. But before changing the settings, note down the original configuration, so that you can always restore the default if need arises. By changing the settings, you can dramatically improve the page load speed, and reduce the amount of memory Firefox uses for it's Cache when minimized . Even if You have no experience, don't be scared, just follow the simple instructions...

Increase Your Page Load Speed:-
1. Type “about:config” (Avoid Double Quotes) into Firefox Url  and hit Enter. (A warning would be displayed, override it.)

2. Alter the entries as follows: (Double Click on it)
Set “network.http.pipelining” to “true
Set “network.http.proxy.pipelining” to “true
Set “network.http.pipelining.maxrequests” to 

some number like 15. This means it will make 15 requests at once.

3. Lastly, right-click anywhere and select New- > Integer. Name it “nglayout.initialpaint.delay” and set its value to “0“.
(This value is the amount of time the browser waits before it acts on information it receives. If you’re using a broadband or a dial-up connection you’ll load pages faster now.)

4.It's Optional for even faster web browsing.
 you might have to create some of these entries by Right Click – > New– > 

Integer or String network.dns.disableIPv6: set “false
content.notify.backoffcount”: set "5";
plugin.expose_full_path”: set “true”.
“ui.submenuDelay”: set "0".

Reduce The Amount of RAM Firefox Uses For Its Cache:-

1. Type “about:config” (the double quotes should be avoided) in the url of the browser.
2. Find “browser.sessionhistory.max_total_viewer
3. Set it’s value to "0".

Reduce RAM Usage To 10MB When Firefox Is Minimized:

1. Open Firefox and go to the Address Bar. Type in "about:config" and then press Enter.
2. Right Click in the page and select New - > Boolean.
3. In the box that pops up enter “config.trim_on_minimize”. Press Enter.
4. Now select True and then press Enter.

After you are done with this then don't forget to restart Firefox. As I'm a beginner blogger, please please comment and share your love.


Sunday, January 10, 2010

See With Your Tongue.

Wicab.Inc has come up with a new technology named as BrainPort Vision Device; which will help visually impaired persons to see the world around them with the help of their tongue. The device consists of a pair of sunglasses with an embedded camera, a hand held cpu/controller and a panel of electrodes array which sits on the tongue. This extraordinary device will translate the information captured by the tiny video camera into a series of electrical signals which can be felt on tongue.

A large number of nerves ending in the tongue process the impulses into a grainy black and white image. This tactile image is created by presenting the white pixels from the camera as strong simulation, black pixels as no simulation, and the gray level as medium level of simulation.

The control unit is used to zoom in, zoom out and adjust the contrast of the image. The present system uses an array of 100 to 600+ electrodes. This has been able to detect high contrast objects, their movement, location and some aspects of perspective and depth. The current resolution is between 400 to 600 points presented at 30 frames per second.

It was reported that a person started crying when he saw his first letter. The device is not yet for sale. It is currently being tested and after some modifications it will be launched.


Saturday, January 9, 2010

The Lemon Battery Trick.

What!! Lemons can be used to generate power? Yes it can be:o This is a very easy and nice experiment you will like to perform. The only things you will require is two different types of metals (as electrodes) and one multimeter for measurement. Any possible metal can be used for example Galvanized nail and Copper coin or Magnesium wire. Copper serves as positive electrodes and galvanized nail as negative electrodes.

An electrochemical reaction between the two take place and generates a small potential difference. But it should be noted that the energy for the battery does not come from the lemon but due to the oxidation and reduction reaction between the two metals. Apple or Potato can also be used but Lemon is preferred because they are more acidic.

You can now check the voltage generated by connecting the multiplier probes to the two metal electrodes. The voltage will be very low. Connect several lemons in series to power standard LED.