Raspberry Pi

Mostly many students love programming in high level languages, but they do not know to control real world applications using computer. So for those fun loving student this is the board, the computer which can communicate with real world and only they have to do is programming.

Raspberry pi is a palm sized computer which can be interfaced with the real world using it input/output pins and the cost of this is very low as compared our personal computer. Raspberry pi works on linux operating system. It has USB port, LAN port, HDMI port, Audio/Video port, it has memory of about 512Mb and is power using ARM6 processor. The operating system is to be loaded in the SD card

Now the upgraded version are also available in the market MODEL-A, MODEL-B, MODEL-B+

I will be shortly updating on how to use raspberry pi, so keep checking

You can buy Raspberry pi using the following link

Raspberry pi A

Raspberry pi B+

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How Does LED Emits Various Color ??

LED (Light Emitting Diode)

We have learned about LED's construction, circuit pinout in our post on LED's (click here).

In this post we are going to discuss about the color of the LED, many few of us know "How LED emits color light".

• The color of the emitted light is decided by its wavelength.
• As we know LED's are made up of semiconductor material, hence the "color of the LED depends upon the the material used to made LED."
•  Silicon and Germanium are not used because the do not emit light in the visible spectrum.

• Colors associated with the different materials are as follows

• RED OR YELLOW            --- Gallium Arsenide Phosphide (Ga As P) is used.
• RED OR GREEN               --- Gallium Phospide (Ga P) is used.
• Infrared                                --- Gallium Arsenide (Ga As) is used.
• Blue                                       --- Galium Nitride (Ga N) is used.

• Some LED's are capable of emitting infrared light which is not visible to our eyes.

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Introduction to Diode

Diode is a two terminal electrical component i.e. anode and cathode. Diode is the first semiconductor electronic component, it is an very important component in electronics, we can say that  " Diode is the Heart of Electronics".
Types of Diode include Rectifier diode(normal diode), Zener diode, Signal diode, Light emitting Diode etc.

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How To Make PCB at Home

"How to make PCB at home ?" is always an question in front of all electronics hobbyist. Here i will teach you most common method used at home for making PCB, known as "Toner Transfer Method". It is a very easy and cheap process of making a PCB at home.

Here is the list of all the things you will be going to need to make an PCB
 1. Copper PCB board.
2. A photo paper (also known as glossy paper).
3. Ferric Chloride FeCl2 solution. (Substitute for ferric cholride : The mixture of HCl acid and Hydrogen  Peroxide, in the proportion 1:2 i.e one parts of HCl and two part of hydrogen Peroxide)
4. Plastic container.
5. Electrical or Masking tape.
6. Electric Iron.
7. Acetone.
8. Drill

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5 Awesome Notepad Tricks

1. Cycle a message in your friend's computer:
Type :

@ECHO off
:Begin
msg * Hi
msg * Are you having fun?
msg * I am!
msg * Lets have fun together!
msg * Because you have been o-w-n-e-d
GOTO BEGIN

Save it as Anything.BAT and give it to your friend. You can change the message and type your own message there.
 

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