Raspberry Pi Selection Guide

Raspberry Pi (a kind of microcomputer designed for learning computer programming education)

Raspberry Pi (Chinese name "树莓派", abbreviated as RPi, (or RasPi / RPI) is designed for student computer programming education, only a microcomputer the size of a credit card, and its system is based on Linux. With the release of Windows 10 IoT , We will also be able to use the Raspberry Pi running Windows. Since its inception, it has been sought after by many computer enthusiasts and makers, and it has been difficult to find a "pie". Regardless of its "petite" appearance, but its inner "heart" Powerful, with all functions such as video and audio, it can be said that "the sparrow is small, but it has all the internal organs."

The Raspberry Pi was developed by the "Raspberry Pi Foundation", a charity organization registered in the United Kingdom, with Eben·Upton/Eupton as the project leader. In March 2012, Eben Epton, University of Cambridge, UK officially launched the world’s smallest desktop computer, also known as a card-based computer, which is only the size of a credit card, but has all the basic functions of a computer. This is the Raspberry Pi Computer board, Chinese translation name "Raspberry Pi". This foundation aims to improve the education of computer science and related subjects in schools and make computers interesting. The Foundation expects that this computer will continue to be developed and applied to more fields, whether it is in developing or developed countries. In 2006, the early concept of Raspberry Pi was based on Atmel's ATmega644 microcontroller. The first batch of 10,000 "sets" of Raspberry Pi "boards" were made by manufacturers in Taiwan and mainland China.

It is an ARM-based micro computer motherboard, with SD/MicroSD card as the memory hard disk. There are 1/2/4 USB interfaces and a 10/100 Ethernet interface around the card motherboard (Type A has no network interface), which can be connected Keyboard, mouse and network cable, as well as a TV output interface for video analog signals and an HDMI high-definition video output interface. All of the above components are integrated on a motherboard that is only slightly larger than a credit card. It has all the basic functions of a PC and only needs to be connected to the TV. With the keyboard, it can perform many functions such as spreadsheets, word processing, playing games, playing high-definition videos and so on. The Raspberry Pi B model only provides a computer board, no memory, power supply, keyboard, case or connection.

Compared with the Raspberry Pi 3B+, the latest fourth-generation product Raspberry Pi 4 B has significantly improved performance in terms of processor speed, multimedia and memory. Raspberry Pi 4B has desktop performance comparable to entry-level x86 PC systems, bringing you a high-quality experience.

Raspberry Pi 4B has a 64-bit quad-core processor running at 1.5Ghz, supports up to 4K resolution dual displays refreshed at 60fps, up to 4GB RAM (1GB, 2GB, 4GB, 8GB can be selected according to the model), 2.4/5.0 Ghz dual-band wireless LAN, Bluetooth 5.0/BLE, Gigabit Ethernet, USB3.0, and PoE functions.

Raspberry Pi 4B is built with the BCM2711 model of CPU, which is an updated version of the Broadcom processor used on the previous 3B+. This processor includes complete performance optimization and a heat sink. This allows a better clock frequency and enables more accurate monitoring of chip temperature.

The Raspberry Pi 4B and the Ethernet port now have more bandwidth, which allows it to provide full gigabit throughput, compared to the previous model's reaching approximately 330 megabits. In the test, the Pi 4B rate was 943Mbps (close to the maximum 1000Mbps). This is almost five times the 237Mbps Pi 3B+.