What is Raspberry
pi?
Raspberry pi is the name of a single board computer which
has the size of a credit card. It was developed in Britain by a group of
engineers whose initial intention was to spread computer science basics among
youngsters especially in third world countries due to its affordable price.
Raspberry pi comes without peripherals or memory card so you have to count them
in the cost analysis before proceeding to the purchase. Next, an image of a Raspberry pi is shown:
Of course, this is just one model of Raspberry pi. Overall,
there are 3 editions of pi with some sub-models. Each model has a unique set of
hardware. This is a table which contains the characteristics of all models that
are available in the market until today (source: https://en.wikipedia.org/wiki/Raspberry_Pi):
|
Type
|
Model A
|
Model B
|
Compute Module*
|
Zero
|
||||||||
|
Generation
|
1
|
1 +
|
1
|
1 +
|
2
|
2 ver 1.2
|
3
|
1
|
3
|
3 lite
|
PCB ver 1.2
|
PCB ver 1.3
|
|
Release date
|
February 2012
|
November 2014[37]
|
April–June 2012
|
July 2014[38]
|
February 2015[12]
|
October 2016[39]
|
February 2016[13]
|
April 2014[40]
|
January 2017[41]
|
November 2015[42]
|
May 2016
|
|
|
Target price
|
US$25
|
US$20[43]
|
US$35[44]
|
US$25[45]
|
US$35
|
US$35
|
US$35
|
US$30 (in batches of 100)[40]
|
$30
|
$25
|
US$5[42]
|
US$5
|
|
Architecture
|
ARMv6Z (32-bit)
|
ARMv7-A (32-bit)
|
ARMv8-A (64/32-bit)
|
ARMv6Z (32-bit)
|
ARMv8-A (64/32-bit)
|
ARMv6Z (32-bit)
|
||||||
|
Broadcom BCM2836
|
Broadcom BCM2837
|
Broadcom BCM2837
|
Broadcom BCM2835
|
|||||||||
|
900 MHz 32-bit quad-coreARM Cortex-A7
|
900 MHz 64-bit quad-core ARM Cortex-A53
|
1.2 GHz 64-bit quad-core ARM Cortex-A53
|
700 MHz single-core ARM1176JZF-S
|
1.2 GHz 64-bit quad-core ARM Cortex-A53
|
||||||||
|
Memory (SDRAM)
|
256 MB (shared with GPU)
|
512 MB (shared with GPU)
as of 4 May 2016. Older boards had 256 MB (shared with GPU)[49]
|
1 GB (shared with GPU)
|
512 MB (shared with GPU)
|
1 GB (shared with GPU)
|
512 MB (shared with GPU)
|
||||||
|
1 (direct from BCM2835 chip)
|
2 (via the on-board 3-port USB
hub)[50]
|
1 (direct from BCM2835 chip)
|
1 (direct from BCM2837 chip)
|
1 Micro-USB (direct from
BCM2835 chip)
|
||||||||
|
Video input
|
15-pin MIPI camera
interface (CSI)
connector, used with the Raspberry Pi camera or Raspberry Pi NoIR camera[51]
|
None
|
MIPI camera interface (CSI)
(rev 1.3)[54]
|
|||||||||
|
Video outputs
|
HDMI (rev 1.3) composite
video (RCA jack),
MIPI display interface (DSI) for raw LCD panels
|
|||||||||||
|
Audio inputs
|
||||||||||||
|
Audio outputs
|
Analog via 3.5 mm phone jack; digital via HDMI
and, as of revision 2 boards, I²S
|
Analog, HDMI, I²S
|
Mini-HDMI, stereo audio through
PWM on GPIO
|
|||||||||
|
MicroSDHC slot
|
4 GB eMMC flash memory chip[40]
|
|||||||||||
|
None[61]
|
10/100 Mbit/s Ethernet,
802.11n wireless, Bluetooth 4.1 |
None
|
||||||||||
|
Low-level peripherals
|
17× GPIO plus
the same specific functions, and HAT ID bus
|
8× GPIO plus
the following, which can also be used as GPIO: UART, I²C bus, SPI bus with two chip selects, I²S audio +3.3 V, +5 V, ground.
An additional 4× GPIO are
available on the P5 pad if the user is willing to make solder connections
|
17× GPIO plus
the same specific functions, and HAT ID bus
|
|||||||||
|
Power ratings
|
200 mA (1 W)[67]
|
700 mA (3.5 W)
|
600 mA (3.0 W)[38]
|
200 mA (1 W)
|
700mA (3.5 W)
|
~160 mA[42](0.8 W)
|
||||||
|
Power source
|
5 V via MicroUSB or GPIO header
|
|||||||||||
|
Size
|
85.60 mm × 56.5 mm
(3.370 in × 2.224 in), not including protruding connectors
|
65 mm × 56.5 mm
× 10 mm (2.56 in × 2.22 in × 0.39 in),
same as HAT board
|
85.60 mm × 56.5 mm
(3.370 in × 2.224 in), not including protruding connectors
|
67.6 mm × 30 mm
(2.66 in × 1.18 in)
|
67.6 mm × 31 mm
(2.66 in × 1.22 in)
|
65 mm × 30 mm
× 5 mm (2.56 in × 1.18 in × 0.20 in)
|
||||||
|
Weight
|
31 g (1.1 oz)
|
23 g (0.81 oz)
|
45 g (1.6 oz)
|
7 g (0.25 oz)[70]
|
9 g (0.32 oz)[71]
|
|||||||
|
Console
|
||||||||||||
|
Generation
|
1
|
1 +
|
1
|
1 +
|
2
|
2 ver 1.2
|
3
|
1
|
3
|
3 lite
|
PCB ver 1.2
|
PCB ver 1.3
|
|
Type
|
Model A
|
Model B
|
Compute Module*
|
Zero
|
||||||||
Raspberry pi has no case as well so you can make a custom
one or buy one online. Generally, pi is used in many kinds of projects (like
robotics) which exceed the initial expectations. There is also a whole pi community
developed which supports the pi users along the world. There is some software
that you can install on a raspberry pi like Raspbian and many other options. So
if you want to use a pi you need the following items:
-
Raspberry pi
-
Keyboard
-
Mouse
-
Monitor
-
Memory card
You write the operating system on the card, you connect all
the peripherals on the pi and you are ready to fly!
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