Microcomputers raspberry pi. Raspberry Pi - what can be done based on the "raspberry"? What to do next
When the power of the Arduino is not enough, the maker comes to the aid of heavy artillery in the form of microcomputers. Raspberry Pi. Most often, “raspberry pies” or “raspberries”, as they are also called, are used in the tasks of processing video, audio information and complex communications. In this article, we will get acquainted with Raspberry, find out what a microcomputer is, what models are relevant today and how you can use this device in your projects.
With the Raspberry Pi, you can make a smart robot that recognizes its owner or a smart home home server that transmits over WiFi or Ethernet. You can connect sensors, motors, relays and more to the microcomputer. Thus, the areas of application of Raspberry and Arduino in DIY projects overlap a lot.
What are Single Board Microcomputers?
A microcomputer is a device that has the architecture of a full-fledged computer, but differs in its size. Today, there are hundreds (!) of different models (including Raspberry clones) from dozens of manufacturers on the market, and this is why the single-board market differs significantly from the market for conventional computers, where all market shares have long been distributed among the leaders.
Microcomputers are most often created for specific tasks; they cannot compete with conventional computers, being inferior to them in terms of power and convenience. But they are cheaper, simpler, have a compact size and consume less energy. This makes the microcomputer an important element of mobile automated systems.
The Raspberry Pi is the most well-known member of the family of single-board microcomputers today. This is a fairly cheap and affordable entry-level board that you can buy in a variety of online stores. Asian manufacturers have created a large number of clones (Orange Pi, Banana Pi and others) that can be used in their projects. And another very important advantage of the "raspberry" is a huge community of developers involved in the development of architecture and software. Many books, tutorials, operating systems and handy tools have been released that make it much easier for beginners to get started with the system. Therefore, it is with this microcontroller that it is recommended to start working with those who have already become “small” arduino.
What is Raspberry Pi?
The Raspberry Pi is an inexpensive credit card-sized computer that attaches to a PC monitor or TV and uses a standard keyboard and mouse. Externally, the computer is a small four-layer printed circuit board with USB, HDMI and other connectors, a Micro SD slot, and a GPIO pin header. Case, memory card, keyboard, mouse, monitor, power supply need to be purchased separately.
With the help of "raspberry" you can learn how to program in Scratch and Python. Initially, the microcomputer was developed with the aim of being used for teaching in schools and universities, so there are many software packages for it and even a special operating system for children.
A key feature of the Raspberry is the ability to connect external devices to it and control them using various software packages (the most popular being Python). All kinds of sensors, LEDs, motors, relays and other electronic components can be connected via GPIO pins in the same way as to Arduino. Therefore, we can significantly expand the functionality of the microcomputer, creating from it a workstation for each specific project.
The history of the appearance of Raspberry
The developer of the device is the British company Raspberry Pi Foundation. The first sample was presented by David Braben in May 2011. The start of production of the first batch of model B dates back to January 2012. Since then, every year the computer has been modernized, and more advanced computers have been on sale.
Model release history:
- February 29, 2012 - start of sales of Model B.
- December 14, 2012 - Production of the Raspberry Pi "A" model begins.
- July 14, 2014 - release of the third version of the Raspberry Pi "B +".
- February 2, 2015 - Raspberry Pi "2B" released.
- November 26, 2015 - the release of the new Raspberry Pi Zero microcomputer equipped with an unmounted GPIO connector.
- February 29, 2016 - the release of the Raspberry Pi 3 model, featuring a 64-bit processor, WI-FI and Bluetooth.
- February 28, 2017 - upgraded version of Raspberry Pi Zero W with WI-FI and Bluetooth.
Raspberry Pi model A+ board pinout
The Model A+ is the budget version of the Raspberry Pi board. The device was released in 2014 to replace the original Model A. The board is shown in the figure below.
Unlike the previous model, A+ has the following characteristics:
- A large number of GPIO outputs - now there are 40 of them.
- Micro SD connector.
- Reduced Energy Consumption - Linear voltage regulators have been replaced with switching regulators, saving energy.
- Advanced audio system - the board has a separate power supply with a reduced noise level.
- Smaller Form Factor - Composite audio output built-in 3.5mm audio output, mounting holes, USB connector located on the edge of the board.
The pinout is shown in the figure.
1, 17 contacts - power supply 3.3 V.
2, 4 pins - supply voltage 5 V. Connected directly to the input voltage of the board.
3 - SDA output (one of the I2C pins on the board).
5 - SCl (also one of the I2C outputs on the board).
6, 9, 14, 20, 25.30, 34, 39 - Earth. All ground contacts are connected, you can use any output that is closer to the remaining elements.
8 - TXD, one of the 2 UART outputs responsible for data transfer. UART pins are usually used to interconnect Arduino and Raspberry Pi. It is important to connect the boards correctly, since the Pi is powered by 3.3V, and the Arduino is powered by 5V.
10 - RXD, output for UART, responsible for receiving data.
11, 13, 15, 16, 18, 22, 29, 3, 32, 33, 36, 37 - reserved contacts.
12 - PCM_C pin, which is used in conjunction with a special PWM method. Provides direct memory access.
19, 38 - MOSI contacts.
21, 35 - MISO contacts.
23, 40 - SCLK contacts.
24, 26 - CS0 and CS1 outputs.
27,28 - ID_SD, reserved for I2C communication with non-volatile memory.
The Raspberry Pi Model A+ board is used in projects where low power consumption is important and where an Ethernet interface is not required.
Raspberry Pi 3 model B board
Raspberry Pi model B is the most common board. Compared to its predecessor, the Pi 2 Model B features a 64-bit ARM Cortex-A53 processor and built-in Wi-Fi and Bluetooth. The board has 1 GB of RAM, which is shared with the graphics system. There are many ways to use the board - with their help you can create game consoles, security systems, tablets and other electronic devices.
There is a 3.5mm jack for connecting headphones and speakers. There are also 4 USB outputs to which you can connect peripherals. Various modules are connected via 15-pin slots:
- DSI - designed to connect the display;
- CSI-2 - camera connection via MIPI interface.
For low-level interfaces, outputs are used:
- General Purpose - 40 I/O ports;
- UART;
- Power inputs and ground.
For communication, Ethernet, Wi-Fi 802.11n and Bluetooth 4.1 interfaces are used. The board uses a microSD card with an operating system installed on it as a hard drive. It is better to use a memory card with a capacity of 8 GB. The Raspberry Pi model B uses the Linux operating system.
The device is powered by a 5 V adapter via a USB connector or power outlets. There is no dedicated power switch on the Raspberry Pi, to turn on the device, just plug in the power cable.
Raspberry Pi model Zero board
The model Zero board series is smaller than its predecessors. There are 2 types of boards of this type - model Zero and the new version of Zero W. The second one differs only in the presence of Wi-fi and Bluetooth on board.
Raspberry Zero Specifications:
- 512 MB of RAM;
- Single-core ARMv6Z ARM1176JZF-S processor @ 1 GHz;
- Mini HDMI port;
- 2 micro USB ports, one for connecting to a computer;
- WiFi 802.11n;
- Bluetooth 4.1
The location of the outputs and the pinout are shown in the figure. The board is equipped with 40 general purpose I/O ports, UART, I2C, SPI, 3.3V and 5V power outputs, and ground. It is important to note that the connector is not soldered and requires self-assembly.
The new Zero W model uses microSD, unlike the older model, which uses miniSD to work. A flash card is used as a medium, its volume must be at least 2 GB. The board is powered by a 5-volt adapter through the power pins or micro-USB input.
Among the disadvantages, one can note the low execution speed compared to the Raspberry Pi 3 model B. But compared to the B, Zero has a smaller size, which allows it to be used in miniature developments. The Raspberry Pi model Zero is used in the same areas as the rest of the computers in this family. The board can be equipped with peripheral devices, a power supply, a screen. With the help of these microcomputers, video surveillance systems, gaming systems, and household appliances are created. The presence of Wi-Fi and Bluetooth allows you to expand the range of applications. Coinciding with the release of the Raspberry Pi model Zero W, the company introduced a line of computer cases. The cases are equipped with a hole for the GPIO connector and camera installation.
Comparison of Raspberry Pi Models
RAM
The Model A and Model A+ boards have the smallest amount of memory at just 256 MB. Model B until October 2012 also had a volume of 256 MB, after the volume was increased to 512 MB, like the Model B +. The Raspberry Pi 3 board has the largest memory size, 1 GB.
USB ports
The Model A and Model A+ boards have one USB 2.0 port, the Model B version has increased the number of ports to two, and the Model B+ and Pi 3 to four. The most notable change for the Raspberry Pi Zero is a single 1 Micro USB OTG connector.
Audio outputs
The Raspberry Pi Zero model also differs in this parameter - this board has a 3.5 mm jack, HDMI is replaced with multi-channel HD sound via HDMI.
Memory card format
Models A and B used SD/MMC/SDIO memory cards. All subsequent models use a microSD card.
Number of ports
Models A and B are equipped with a 26-pin GPIO header, in the following models this number is increased to 40.
Power consumption
The most energy efficient device is the Raspberry Pi Zero - it uses only 160 mA. The highest power consumption is on the Raspberry Pi 3 board (800 mA-2.5 mA, 4 W). The first model A consumes 300 mA (1.5 W), models B, A+, B+ require about 600-700 mA.
Dimensions
The smallest device is Raspberry Pi Zero, its dimensions are 65.0 x 30.0mm x 5mm. Slightly larger is the A+ model, which measures 65.0 x 56.0mm x 12mm. The rest of the boards are roughly the same size at 85.0 x 56.0mm x 17mm.
Where to Buy a Raspberry Pi
Due to the huge popularity of Raspberry Pi microcomputers, they can be purchased anywhere in the world in any store. But only 2 European companies are considered official sellers - these are RS Components and Element 14. Both firms supply minicomputers in different packaging designs, but the goods from both suppliers are made in England.
Over time, Chinese counterparts appeared, which can be bought on AliExpress. The question of the authenticity of these gadgets immediately arises. An analysis of the Chinese and English versions can be made by comparing their performance, processor performance, memory.
The processor in the original English version is slightly faster than the Chinese counterpart, the same goes for the RAM. The differences in operation are minimal, from which we can conclude that the Chinese version of the Raspberry Pi is no worse in terms of its operating parameters.
Raspberry Pi Project Examples
Managing a portable weather station. Using the Raspberry Pi, you can implement a device that will record all weather data - wind speed, temperature, precipitation. You can set your device to auto-update the site with weather conditions.
Digital photo frame. With a Raspberry P, you can make your own photo frame and save about half the cost. The photo frame is a media panel that is controlled by the Raspberry P. The frame can be upgraded - it will show not only photographs, but also the date and time, play audio recordings, and show the weather forecast.
Home automation system. If you combine your Raspberry Pi with Arduino and Node.js, you can create an efficient way to control all the electronic devices in your home. There are many options for working - automatic switching on and off of the light using a light sensor, turning on / off the TV, regulating the temperature in the house.
With the Raspberry Pi board, you can implement a variety of projects - from musical instruments to cameras and tablets. Moreover, the use of this board can significantly reduce the cost of a home-made device.
Single-board microcomputers of the popular Raspberry Pi line are used in programming lessons at schools and universities; in personal engineering, music, information projects. The scope of Raspberry Pi microcomputers is limited only by the user's imagination, as the creators themselves say in their presentations. The success of the Raspberry Pi is explained simply:
Profitable price
. High compatibility with other devices and software
. m miniature size
. d Decent build quality
Not so long ago, an updated version of the third generation Raspberry Pi, called the Raspberry Pi 3 Model B +, went on sale. At the moment, this device is the most powerful microcomputer of the popular line presented by the engineers of the Raspberry Pi Foundation.
Specifications
Processor - Broadcom BCM2837B0, Cortex-A53 64-bit SoC @ 1.4GHz
Memory- 1GB LPDDR2 SDRAM
GPU - VideoCore IV
Gigabit Ethernet - (Microchip LAN7515, speed up to 300Mbps via USB 2.0 bus)
Built-in dual-band Wi-Fi - (2.4GHz / 5GHz) IEEE 802.11 b/g/n/ac (Cypress CYW43455 chip)
Integrated Bluetooth 4.2 LE (Cypress CYW43455 chip)
Video/Audio - 1x full size HDMI, 1x MIPI DSI port for display connection, 1x MIPI CSI port for camera connection, 4-pole stereo output and composite video port
multimedia- H.264, MPEG-4 decode (1080p30); H.264 encode (1080p30); OpenGL ES 1.1, 2.0 graphics
SD card support - Micro SD format for operating system boot and data storage
USB - 2.0
40 GPIO pins
Camera interface - CSI
Display interface - DSI
Operating ambient temperature - 0-50°C
Nutrition- 5V/2.5A DC over Micro USB, DC 5V over GPIO, Power over Ethernet (PoE) - enabled (separate PoE HAT required)
Dimensions - 85 x 56 x 17 mm
Country of manufacture - United Kingdom
Operating system
The product runs on a free Linux OS, which is stored on a micro SD memory card. Also, a special Raspbian shell has been developed for microcomputers, which contains many educational programs. Raspbian is written in Python and offers programming training in that language. The official version of Windows 10 works with support for 32-bit applications. And when you install Android TV, you can achieve the appearance of a real media center in your home: cheap, efficient and stable.
New networking features
The key difference between the new model and its predecessors is the expansion of the network capabilities of the device, which may be of interest to those developers who want to integrate the Raspberry Pi 3 Model B + into their product. Now this will require a lot less certification tests.
The main design advantage of the new Raspberry Pi 3 Model B+ is the presence of a metal plate above the board elements. Hidden from the user's eyes is the new Cypress wireless chipset at 2.4 and 5 GHz, which allows you to work with a large number of Wifi networks. The original Raspberry Pi 3 only supports 2.4GHz connections.
In previous devices in the line, the connection speed did not exceed 80 Mbps, because the network potential was limited to four USB ports, supplemented by an Ethernet controller on the LAN9514. The new Raspberry Pi 3 Model B+ features LAN7515, which triples the speed to 300Mbps. Now the device can serve as a full-fledged network server in your home, as well as send a large data packet over a wired network.
Two types of Bluetooth - classic and low energy - allow you to work with any peripheral and media systems, including headsets.
Speaking about the network capabilities of the novelty, it is worth mentioning an additional PoE connector (Power over Ethernet), which can be found next to the USB hub.
Increase in performance
In addition, the novelty is faster than all devices in the Raspberry Pi line. If earlier the manufacturer's statements about the possibility of using these products as an alternative to a computer were dubious, then the new Raspberry Pi 3 Model B + has changed the opinions of users for the better. The new model, thanks to its speed and wireless capabilities, has become a good alternative to a desktop computer. The user has the opportunity not only to surf the Internet and edit text files, but also rely on the Raspberry Pi 3 Model B+ for more serious computing tasks.
Performance improvement became possible thanks to power optimization, the appearance of a metal case above the processor and, accordingly, a heat sink. The new model does not run at 1.2 GHz like the Raspberry Pi 3, but at 1.4 GHz.
All the benefits of the Raspberry Pi
The dimensions are similar to the Raspberry Pi 2 and Raspberry Pi 3, which will keep all cases. Also, the novelty inherited from other products of the line a full-size HDMI port, a combined analog audio-video output of 3.5 mm. The amount of RAM has not changed and is 1 GB, which, together with other technical characteristics, allows you to run some video games like the popular Minecraft and Quake III on the Raspberry Pi 3 Model B+.
The device can use the system of the previous version (Raspberry Pi 2) due to the fact that the core of the single-chip system remains on the already familiar ARMv7 architecture. As an illustration of what we are talking about, there is an example: processors with the same performance can be found in the filling of modern entry-level and even mid-range smartphones. The battery is a 2-amp micro USB charger.
Conclusion
In general, a set of modules on the Raspberry Pi 3 Model B + board allows you to save up to 1000 rubles on the purchase of the necessary chipsets. This device will be of interest primarily to those users who have been satisfied with the assembly of other Raspberry Pi boards , but it also lacked the processing power of the previous generation.
Finally, I got another package from a Raspberry Pi 3 Model B single-board computer, basic accessories for it, and some other small things.
And this article will describe the process of getting to know the microcomputer - from unpacking to the first launch of the operating system and performing initial settings.
To get started you will need:
- microSD memory card with a capacity of 8 GB
This is what the microcomputer assembly will consist of.
In addition, you need to have the following peripherals:
- Monitor or TV with HDMI input
- Wired keyboard
- wired mouse
- MicroSD card reader or device capable of performing its function
Screen for displaying information, input devices, a card reader for recording an image of the operating system.
And for greater convenience, it will not be superfluous to have:
- Bluetooth keyboard
- bluetooth mouse
It is more convenient to control the “raspberry” with a wireless mouse and keyboard than their wired counterparts.
Small review of Raspberry Pi 3 Model B
The Raspberry Pi 3 Model B microcomputer comes in a red and white cardboard box with a raspberry logo.
The package includes the Raspberry Pi 3 board itself in an antistatic bag and a small safety leaflet (do not cover the Raspberry Pi when it is turned on, do not overclock, avoid overheating, do not use in damp and humid places, avoid mechanical damage to the printed circuit board, etc. .d.).
For some reason, the standard Windows formatting tool is not suitable: when trying to start Raspbian from a memory card formatted through it, an error “error resizing existing FAT partition” will be issued.
Step 2. Burning the Raspbian Distribution
After preparing the microSD card, you need to download the Raspbian distribution from the official website.
The downloaded distribution image is archived, so after downloading the archive you need to unpack it into any folder.
The unpacked Raspbian image needs to be written to the prepared microSD card, for which you can use the free Rufus utility.
Step 3Launch Raspbian on Raspberry Pi for the First Time
This completes the installation procedure.
The memory card with Raspbian written on it must be installed in the Raspberry Pi and connected to the microcomputer monitor and power, after which the operating system will start for the first time.
Now you can connect your Raspberry Pi to a wireless Wi-Fi network, and if you have a Bluetooth mouse and keyboard, then pair them with a microcomputer for greater ease of use.
We put updates
After installing Raspbian and connecting to the Internet via an Ethernet or Wi-Fi connection, you need to update all packages to the latest version just in case.
This is done through the terminal by entering two commands:
sudo apt-get update sudo apt-get upgrade
The first command downloads information about available package updates, the second one directly downloads the updates themselves.
Just in case, let's update the Raspberry Pi firmware:
sudo rpi-update
Upon completion of the installation of updates, the Rapsberry Pi needs to be rebooted:
And if everything is done correctly, then after the reboot the system will notify us that it has been updated to the current version.
Many commands on *nix systems begin with sudo: this means that the execution of the command is run with superuser rights, which is similar to "Run as administrator" in Windows.
Removing black borders from the edges of the screen
In some cases, after downloading Raspbian, the user finds black boxes around the edges of the screen.
This means that the scan is set incorrectly.
It is fixed literally in two mouse clicks by editing the configuration file through a text editor:
sudo leafpad
Opening the file /boot/config.txt and look for the line in it:
#disable_overscan=1
And we remove the # symbol, turning it from a comment into an executable command:
Disable_overscan=1
That's all. After a reboot, the Raspbian interface will be displayed in full screen without any black borders.
Localization settings
By default, Raspbian is set to a UK user.
You can change the localization settings in the settings, both through the graphical interface ( Menu -> Parameters -> Raspberry Pi Configuration), and via the console:
sudo raspi-config
It seemed to me that changing the settings through the graphical interface is more convenient, so in this text I will consider it.
So let's start Raspberry Pi Configuration.
On the tab System press “Change Password…” and set the root password. By default, it is absent, which may prevent the execution of some commands in the future.
Switch to tab localization.
“Set Locale…”- select Country: RU (Russia), Character Set: UTF-8. The system language (Language item) can be changed to “ru (Russian)”, or you can leave it as it is. The localization of Raspbian is not 100% complete, and when choosing the Russian language, you will have to be content with a hodgepodge of Russian and English texts in the interface.
“Set Time Zone…”- here you need to select the appropriate time zone. Since the territory of Russia covers both Europe and Asia, depending on the geographical location, either “Asia” or “Europe” is selected in “Area”, and in “Location” - one of the cities, the time zone in which corresponds to the time zone of your area.
For example, in the Urals, the time zone is UTC / GMT + 5, which is commonly called the “Yekaterinburg time zone”. In the “Location” column in Raspbian, there is no settlement Ekaterinburg (Yekaterinburg), but there is a settlement Ashkhabat living in the same time zone. So I set it up and the system clock starts showing my local time.
“Set Keyboard…”- do not touch, we will talk about keyboard layouts further.
“Set WiFi Country”- here we set “RU Russia”, although there is no great need for this, the built-in adapter also works on local default settings. Most likely, this setting is important for some third world countries, where Wi-Fi standards are severely limited for militaristic purposes.
Keyboard layout
The required keyboard layouts and the ability to switch between them are added by entering the console command:
Setxkbmap us,ru -option grp:alt_shift_toggle
In this case, Russian and English layouts are added. English stands as the main one, and switching between them occurs using the Alt + Shift key combination.
You can change the combination to Ctrl + Shift, if so familiar, by making the appropriate edit to this command.
The problem is that Raspbian does not remember this command, and after each reboot of the Raspberry Pi, it will have to be entered again. And this is inconvenient.
Therefore, open a text editor:
sudo leafpad
And we correct through it the system keyboard settings stored in the file /etc/default/keyboard.
You need to replace the lines:
XKBLAYOUT="gb" XKBOPTIONS=""
XKBLAYOUT="us,ru" XKBOPTIONS="grp:alt_shift_toggle,grp_led:scroll"
Now let's add a graphical keyboard layout indicator to the system:
sudo apt-get install gxkb
And put it in autoload. This is also done through editing text files:
sudo leafpad
Opening the file /home/pi/.config/lxsession/LXDE-pi/autostart and add the following line to the end:
Now it remains only to reboot the Raspberry Pi to apply the changes:
Raspberry Pi 3 Impressions
The first thing you notice when using the Raspberry Pi is the complete silence of its operation.
No, it is clear that if completely passive cooling is used and there are no air coolers, or even a conventional HDD based on moving parts, then there is simply nothing to make noise.
But the mere fact of the existence of such a computer - a real, full-fledged computer, and at the same time completely silent - at first staggers the imagination.
Now as for performance.
The power of the Raspberry Pi 3 Model B is enough to perform simple office and multimedia tasks: comfortable work in the office suite, watching videos and surfing light sites on the Internet.
But watching online video is given to the “raspberry” is already hard, and when you open 4-5 YouTube tabs at the same time, Raspbian starts to freeze a little.
According to rumors, with the playback of online video, everything is more than good in operating systems specially tailored for the multimedia component - for example, OpenELEC. I plan to consider the topic of using the Raspberry Pi as a home media center in the future.
Well, the Raspbian distribution kit is intended for teaching programming (it’s not for nothing that it already has IDEs for programming in Java and Python pre-installed out of the box, and such a funny thing as Scratch is a programming environment that allows you to compose algorithms in a visual-graphic form) and to control the connected software GPIO peripherals. This is also an interesting topic, and I will return to using the Raspberry Pi GPIO interface in the future.
Conclusion
This is how my acquaintance with the Raspberry Pi 3 microcomputer went.
The following articles in the series will cover topics such as:
- Sharing Raspberry Pi and Arduino
- comparison of Raspberry Pi with other single board computers on the market
And for those who are interested in the prospect of buying a Raspberry Pi 3, I want to remind you that the adequate price for this microcomputer ranges from $35-$40.
It is at this price that Raspberry Pi can be purchased in China, while at our “gray” dealers the retail price of this microcomputer starts from 3,000 rubles and can reach 4,500 rubles.
Don't feed a bunch of middlemen - order Raspberry Pi at a fair price in China!
We have tried to make the description as good as possible so that your choice is unmistakable and conscious, but since we may not have exploited this product, but only felt it from all sides, and after you buy it, try it in work, your feedback can make this world a better place, if your feedback is really useful, then we will publish it and give it you the opportunity to make the next purchase with us on the 2nd column.
Raspberry PI 3 Model B+ - indispensable thing on the road
5 Sergeev Viktor Vladimirovich 02-09-2019
Raspberry PI 3 Model B+
Advantages:
small and functional. eats little
Disadvantages:
there are not enough indicators that indicate the status of the device
Raspberry PI 3 Model B+ - Raspberry PI 3 Model B+ - a good mini computer
3 Amitin S.B. 01-02-2019
Owner's Rating: Raspberry PI 3 Model B+
Advantages:
Purchased to create a media center (for everyone) and conduct experiments (for myself). The performance is good for its tasks, loading 3 seconds. Approached, like a native, branded power supply from Lenovo at 2.1A 5V, the voltage does not sag.
Disadvantages:
The product does not correspond to the declared parameters. No packaging, no made in UK. Only a bag, only made in China. Disappointed, this could be cheaper to order directly from China.
Raspberry PI 3 Model B+ - Great single board computer
5 Dmitry 27-12-2018
Owner's Rating: Raspberry PI 3 Model B+
Advantages:
Small size, good performance, 1 Gb LAN port (just in the new version)
Disadvantages:
not found, because I know what I bought.
Raspberry PI 3 Model B 1Gb — Corresponds to the declared parameters
5 Shcherbansky M.A. 15-07-2018
Owner rating: Raspberry PI 3 Model B 1Gb
Advantages:
Assembled with high quality. The software installs without problems. Both Raspbian and Ubuntu work without problems. MiniDLNA and Syncthing also got up easily. Complete with two flash drives in a mirror raid, you get a good cloud for photos from smartphones.
Disadvantages:
Unfortunately, there is no quiet fan for cooling, and heatsinks really help only under light load.
Raspberry PI 3 Model B 1Gb — A great thing for those who know what to do with it.
5 Vitaly 29-10-2017
Owner rating: Raspberry PI 3 Model B 1Gb
Advantages:
Small in size, works on many Linux distributions, and there are many distributions for specific tasks. RDP client is just one of them. From Rpi3-it turns out an excellent print server, you can make an Internet camera or a secure access point, with a channel through Tor. Well, and many other features, like a smart home controller or a controller for a robot.
Disadvantages:
For normal operation, a power supply unit of at least 2.5A is required, it is better not to save money and buy an original PSU. Desirable sticker heatsink on the processor.
Raspberry PI 3 Model B 1Gb - Excellent
5 Khasanov Artur Maratovich 11-07-2017
Owner rating: Raspberry PI 3 Model B 1Gb
Advantages:
Small Quiet Reliable Made in UK Perfect for the job. I have a web server running on it: art-home.me The perfect toy for a Linux user :)
Disadvantages:
Yes, they simply do not exist. The only thing is that I bought a separate PSU from the UK, because it's hard to find one with such an amperage here.
Raspberry PI 3 Model B 1Gb — Raspberry PI is Raspberry PI
5 Artyom 16-06-2017
Owner rating: Raspberry PI 3 Model B 1Gb
Advantages:
An excellent single-board for studying microelectronics or creating a smart home. The price in Niks is one of the lowest.
Disadvantages:
Not found
Owner rating: Raspberry PI 3 Model B 1Gb
Advantages:
The price for the Raspberry PI 3 Model B here was one of the lowest, in addition, the purchase could be picked up in several convenient places for me. Getting to the store on Zvezdny was more convenient, parking was no problem, the store was clearly visible. Having quickly issued a previously made order through an employee at the "desk", I went to the cashier and paid with a card. At the same time, two more purchases related to the "malinka" ripened, which were also quickly and successfully completed.
Disadvantages:
It is a pity that there was no Raspberry PI 3 Model B in the store on Avtozavodskaya that day, in this case the whole procedure would have been even faster for me.
The Raspberry Pi mini PC has quickly become a popular platform for projects of all kinds, both commercial and non-commercial. There are several reasons for this, among which are the low price of a computer, its relative versatility and openness.
As a result, interesting projects began to appear with enviable regularity, and some of these projects are presented in this selection. There are quite serious systems here, and projects that can be called entertaining, from the “why not?” series.
Supercomputer based on Raspberry Pi and Lego
One of the more interesting Raspberry Pi projects is a 64 Raspberry Pi supercomputer. The usual Lego constructor served as elements for creating "server cabinets".
As a ROM for this system, SD memory cards with a capacity of 16 GB were used. Such cards were installed in each "raspberry".
How to do something similar? Detailed instructions from the creator, professor at the University of Southampton Simon Cox - at this link.
Pi based weather balloon
Computer enthusiast Dave Ackerman decided to use his own mini PC to build a weather balloon capable of taking photos from the stratosphere. Detailed .
After a few months of work, Dave was actually able to launch his probe, which flew over 30 kilometers, operated at temperatures of -50C in a very rarefied atmosphere (1% of the standard).
The probe recorded all the necessary parameters, including temperature, humidity, density, altitude. The coordinates were also fixed. Among other things, a camera was also used, with which we managed to get many excellent pictures.
Internet phone
On the basis of the "raspberry", a conventional landline phone with a rotary dialer was improved. Instead of a regular board, the developer installed a Raspberry Pi.
After a series of manipulations, the developer managed to create a Skype phone as a standalone device, without the need to use a connection to a regular computer.
Here's how it looks and works:
play station
This is the project of the habr user wwakabobik. An interesting device that allows you to play a number of old games for a large number of consoles, including NES, SNES, Sega Genesis, PlayStation, as well as SCUMMVM, zxspectrum.
The author wrote that "the whole system is based on a port of RetroArch, based on the libretro library, which allows you to use emulators of various consoles." As for the graphical shell, EmulationStation was used, also RetroPie.
Raspberry based tablet
This tablet has an interesting name - PiPad, and wood was used as the material for the case. It all looks like this:
The screen size of the tablet is 10 inches. Well, all other characteristics coincide with the characteristics of the "raspberry" itself. True, there is no longer a couple of hours of work, but a thorough work. Detailed instructions for creating a tablet based on "raspberry" inside.
The OS is Raspbian Linux with XBMC.
Wall calendar organizer
Instructables user Piney has created a useful gadget for himself - an interactive wall calendar with the ability to add tasks and events.
The software platform is a regular Google Calendar, all data from which is broadcast via WiFi to this wall device.
Detailed instructions on how to create something similar are here.
Own radio station
I don't know how legal it is, but the project is really interesting. Dedicated to those who have always wanted to become a DJ at their own radio station.
True, the coverage of such a radio station is relatively small: an area equal to the area of the stadium.
DVD changer
The person who created this thing just got fed up with changing DVDs all the time. The result was this project, which was made simply because it could be done. Why not?
Christmas Lighting System
There is not much time left before the New Year and Christmas, so if there is an extra “raspberry”, you can create a lighting system for your own house or apartment. How to make such a system is described. Below is a video showing how it works.
In general, the scope of the Raspberry Pi is very wide, much wider than the creation of photo frames and laptops. Developers are trying to improve their device by releasing new, updated versions of the mini-PC and additional modules for it. For example, Raspberry Pi B + came out in the summer, the company recently introduced a display for "raspberries". And after some time (unfortunately, it is impossible to say more definitely), the release of Raspberry Pi A + is also planned.
