2.4 Power Supply
2.4.1 Micro USB Power Supply Port
Raspberry Pi supports Micro USB socket to power the system. Micro USB sockets are a common standard for charging mobile phones and mobile devices.
The power supplied to the system is using a 5.1V DC power supply. How much current is needed in Raspberry Pi depends on the type of Raspberry Pi model and number of peripherals connected to Raspberry Pi.
2.2 SoC, CPU and Memory
● System on a Chip(SoC)
Raspberry Pi is a System on a Chip (SoC) type computer. System on a Chip (SoC) refers to the way in which all electronic components required for computer operation are concentrated on one chip. In this method, the CPU, GPU, USB controller, RAM, Northbridge, Southbridge, and other components are compressed and bundled together on one chip without installing separate chips.
2.1.2 Characteristics Comparison of Raspberry Pi Model
● Characteristics of Raspberry Pi 1 model A and Raspberry Pi 1 model B
device
Raspberry Pi 1 model A/A+
Raspberry Pi 1 model B/B+
SoC
Broadcom BCM2835
Broadcom BCM2835
CPU
700MHz Single-Core
ARM 1176JZFS
700MHz Single-Core
ARM 1176JZFS
2.1 Hardware Configuration of Raspberry Pi
2.1.1 Basic configuration of Raspberry Pi
The hardware of Raspberry Pi has depends on the model, but the basic framework maintains the same structure as before. However, as the popularity of Raspberry Pi has increased recently, and the requirements for higher performance and various functions have been raised, and thus usage area has been expanded, hardware configuration of the latest model is slightly changed to support higher performance and add new functionality.
1.2 Features of the Raspberry Pi
● Small size
Raspberry Pi is a System on a Chip (SoC) type computer. System on a Chip (SoC) refers to the way in which all electronic components required for computer operation are concentrated on one chip. All the functions are installed on one board and additional work for installation or assembly is not necessary. And it is a completely working computer by itself.
Raspberry Pi is a very small computer with the size of a credit card. It can be easily attached to other machines or equipment if necessary, and it is also very easy to carry because of its small size.
1.1.2 Development History of the Raspberry Pi
Raspberry Pi is launched in April 2012 with the first Raspberry Pi 1 model B, and Raspberry Pi 1 model A was released in November 2012 to the world.
Since then, improvements have been made to the functions of model A and model B, and Raspberry Pi B+ in July 2014 and Raspberry Pi A+ in November 2014 was supplied. They have increased the number of USB ports to 4, enabled Micro SD cards, and expanded the GPIO pin to 40 to enhance the system for the improved usability and various applications.
The popularity of Raspberry Pi has increased and there is a lot of demand for universal use. So there is a need to run a bigger program, and system performance improvement work has been done. As a result, Raspberry Pi 2 has been released in February 2015. It is equipped with a CPU that supports 900MHz quad-core and supports 1GB of RAM to run large programs.
1.1 Overview
1.1.1 Birth of the Raspberry Pi
Raspberry Pi (abbreviated as RPi or RasPi) is a very cheap credit card-sized Linux computer developed by the British charity Raspberry Pi Foundation, originally developed to teach computer programming to students from poor countries around the world.
Since then, because of its powerful functions, its small size and low cost, Raspberry Pi has been widely known around the world and become popular, and not only it has been used for computer education for children that is its original development purposes, but also many people have purchased and used it for their own business or personal purposes.