What is raspberry Pi?



Now days we hear a lot about Raspberry Pi.

What is RaspberryPi :: In one line we can say that its small card size computer. But when we say computer it should have monitor or screen, keyboard , mouse etc. It’s basically small CPU (motherboard with Processor + RAM attached). If you want to use display connect to any TV or monitor with HDMI cable, you can use USB keyboard and mouse for input devices.

There is GPIO PIN available in Pi, we will discuss about this in later as for starting this introduction is enough J

Other components 

When we purchase any new PC we need Hard Disk to install Operating system like windows/Linux etc here in Pi we use SD card as storage. Now days we get the high speed SD card at good price so we can use good SD card for storage. If you use the Unix operating system without GUI (command mode) then 8 GB is enough still depend on your requirement you can use higher storage.

We need power to start the Pi, it uses micro USB pin charge which is used in many of android phones. Its recommended to use 2.5 – 3 AMP power charge for Pi3


We need to install the OS on SD card, explained in other section. Once OS is ready, we will connect HDMI with TV. Once we connect charger  then raspberry pi will boot. you will see linux prompt on screen. I have explained in different pages in Pi drop-down.

You can connect USB keyboard and login.


History :

Respberry Pi was developed in UK by the Raspberry Pi foundation to teaching the computer to schools in developing countries.

Different Pi versions

Several generations of Raspberry Pi have been released.

The first generation (retrospectively known as the Raspberry Pi 1) was released in February 2012 in basic Model A and a higher specification Model B.

Improved A+ and B+ models were released a year later.

The Raspberry Pi 2 was released in February 2015

Raspberry Pi 3 in February 2016.


Pi Model CPU Architecture CPU RAM USB Port Onboard Network 
Raspberry Pi1 ARMv6 700 MHZ single core 256 MB (shared with GPU) 1 NA 700 mA (3.5 W)
Raspberry Pi2 ARMv7 900 MHz 32-bit quad-core 512 MB (shared with GPU) 2 Ethernet 600 mA (3.0 W)
Raspberry Pi3 ARMv8 1.2 GHz 64-bit quad-core 1 GB (shared with GPU) 4 Ethernet + Wifi + bluetooth 800 mA (4.0 W)


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