Raspberry Pi

The Raspberry Pi is a series of single-board computers. They are low-cost, high-performance and the size of a credit card. The Raspberry Pi was developed in the UK by the Raspberry Pi Foundation. The Raspberry Pi Foundation's goal is to "advance the education of adults and children, particularly in the field of computers, computer science and related subjects." The Raspberry Pi Foundation, "About Us". Retrieved 21 July 2015 Many people have used Raspberry Pis to make things like cameras, video game consoles, robots, web servers and media centres.

 Versions 
There are lots of different versions of the Raspberry Pi, and each has different features.

All of the versions use a Broadcom 'system on a chip' (SoC) which contains an ARM-compatible central processing unit (CPU), random-access memory (RAM) and a graphics processing unit (GPU).

All versions use an SD card or MicroSD card for the operating system and file storage. They also have a 40-pin General-Purpose Input/Output (GPIO) connector, which can be used for controlling other electronics.

Some versions of the Raspberry Pi have an ethernet connector for connecting to the internet. Some versions can also use Wi-Fi to connect to the internet.

The Raspberry Pi comes in three different sizes. The 'standard' size is used for all Model B versions, and is 85.6 mm x 56.5 mm (3.370 in × 2.224 in). The 'compact' size is used for all Model A versions, and is 65 mm × 56.5 mm (2.56 in × 2.22 in). The 'zero' size is used for all Raspberry Pi Zero versions, and is 65 mm × 30 mm (2.56 in × 1.18 in).
+Raspberry Pi VersionsVersionModelSizeProcessorMemoryUSB portsEthernetWiFi and BluetoothYear ReleasedPrice (USD)Raspberry PiBStandard700 MHz 1-core512 MB2YesNo2012N/AA1No2013N/AB+4Yes2014$25A+Compact1No$20Raspberry Pi 2BStandard900 MHz 4-core1 GB4YesNo2015$35Raspberry Pi ZeroZeroZero1000 MHz 1-core512 MB1NoNo2015$5Zero WYes2017$10Raspberry Pi 3BStandard1200 MHz 4-core1 GB4YesYes2016$35A+Compact1400 MHz 4-core512 MB1No2018$25B+Standard1 GB4Yes2018$35Raspberry Pi 4B (1 GB)Standard1500 MHz 4-core1 GB2xUSB2, 2xUSB3YesYes2019N/AB (2 GB)2 GB$35B (4 GB)4 GB$55B (8 GB)8 GB2020$75

 Features 
 The Raspberry Pi uses the ARM processor architecture, which is also used by many modern mobile phones.
 An operating system can be installed using the Raspberry Pi Imager, or by copying operating system 'images' to an SD card.
Add-on boards called 'HATs' (Hardware Attached on Top) can be used to give a Raspberry Pi more features, such as LED lights, extra sensors and Power over Ethernet (PoE).

 References 

 Other websites 
 http://www.raspberrypi.org - The Raspberry Pi Foundation
https://www.raspberrypi.org/documentation/faqs/ - Frequently Asked Questions about the Raspberry Pi

Category:Computer hardware