The Raspberry Pi device was developed as alternative for large and expensive desktop computers. In situations when there's no need to use the high computing power, and the requirements introduced to the equipment are the compact size and low power consumption, the raspberry will work great. This miniature computer has a performance at level of a Pentium II, but for normal work enough is only a screen (monitor or TV), memory card, phone charger and computer keyboard. In the case of using graphic mode, you should also connect a mouse.
Table comparing the models of Raspberry Pi.
|RAM:||256 MB||512 MB|
|Video outputs:||RCA, HDMI|
|The outputs of the sound:||3.5 mm jack, HDMI|
|USB ports:||1 x USB||2 x USB|
|Data carrier:||connector for SD / MMC / SDIO cards |
|Network connections:||no||10/100 Ethernet (RJ45)|
|Other connectors:||8 x GPIO, UART, I2C, SPI, +3.3 V, +5 V|
|Power:||500 mA (2.5 W)|
700 mA (3.5 W)
Built-in Jack HDMI allows you to directly connect a TV or monitor, and broadcast in the resolution of Full HD (1080p). In the absence of HDMI, the user has at his or her disposal, connector RCA (popular Chinch).
Audio transmission is via connector Jack of 3.5 mm that is used in the popular speakers and headphones. Sound can also be transmitted through cable HDMI, if the TV or monitor is equipped with speakers.
The creators of Rasbpery PI resigned from the hard drive. Its role took on a much lighter, less emergency SD memory card. With this solution, the computer is lightweight and consumes much less energy. Through the card, installed is the operating system, in addition, it serves as a place to store data.
Raspberry has the main communication interfaces, which can be found in office computers of PC class. In addition to the previously listed connectors of audio and video, the user has at his or her disposal:
- two USB connectors, which can connect, for example, a mouse, keyboard or USB flash drive. If you find that the slots are too short, you can increase their number using an external USB HUB
- Ethernet slot , that is the ability to directly connect to the LAN network
- Wi-Fi - in our offer, there is also a wireless network USB card , thanks to which Raspberry can connect to a Wi-Fi network
In addition, the system includes interfaces that are typical for systems based on microcontrollers:
- GPIO - outputs/inputs with general purpose that can be used to operate LEDs, buttons, drivers of engines
- PiFace - in our offer, there is also a module PiFace that expends the GPIO ports,
- the I2C bus - it allows for communication with various sensors (e.g. of temperature or acceleration)
- Gertboard - a module expanding the capabilities of Raspbery Pi, i.a. with the ability to control DC motor, A/C converters and additional GPIO pins
- SPI - it allows you to connect quick converters analog-to-digital and different types of memory,
- UART - a popular, simple serial interface.
As a power source, the system uses the connector microUSB. In practice, this means that to run Rasbperry Pi, you can use the popular in Smartphone world, charger with the above mentioned connector.
In order to install the operating system, you just have to have the SD card connector on the computer and access to the Internet. In order to download the software and the file that contains the virtual operating system image, you should go to the page: link. Then, using the downloaded software, install the image on the memory card. The whole procedure is quick and uncomplicated, we prepared brief manual on how to install the operating system.
Raspberry Pi works i.a. with the following operating systems:
- Debian GNU/Linux
- Ach Linux ARM
- RISC OS
- Android 4.0
- Gentoo Linux/li>
- Google Chrome OS/li>
- Slackware ARM
The Raspberry Pi, like any computer, requires some basic accessories to work correctly. Most of them, we have in our offer: