The actual Impression of Raspberry Pi: $ 35 linux computer

The Raspberry Pi Foundation is a small charitable organization in the UK, the purpose of its establishment is to promote technology, rather than selling technology. The Foundation has never published a product in the past, and therefore chose two global channels Premier Farnell and RS Components to handle the first Raspberry PI order. Faced with amateur fans and enthusiastic DIY's technology fans, Raspberry Pi sales is very good. Raspberry Pi is a Linux system-based personal computer with a 700MHz processor, 256 memory, support SD card and Ethernet, with two USB interfaces, and HDMI and RCA output support. It is reported that although Raspberry Pi looks very mini-only one credit card size, it can run games like "Rayt God Three: Arena" and perform 1080p video playback. The hardware foundation is ARM, the operating system uses open source Linux systems, with self-contained IceWeasel, Koffice and other software to meet basic web browsing, text processing, and computer learning needs. According to the company's plan, Raspberry Pi has two models, A version of $ 25, B version of $ 35. Its difference is that there are many features, such as Ethernet interfaces, and USB interfaces. Let's take a look at the difference between these two versions: Type A Type B Listing price: $ 25 $ 35 SOC (system-level chip) Broadcom (Boyong) BCM2835 (CPU, GPU DSP and SDRAM) CPU ARM1176JZF-S core (ARM11 series) 700MHz GPU (graphics processor) Broadcom VideoCore IV, OpenGL ES 2.0, 1080P 30 H.264 / MPEG-4 AVC HD Decoder RAM 256 MB (shared with GPU, you can understand the memory and memory sharing of integrated graphics cards) USB 2.0 1 2 (Support USB HUB extension) Video output Composite RCA (PAL & NTSC), HDMI (REV 1.3 & 1.4), Raw LCD PANELS VIA DSI 14 HDMI Resolutions from 640 x 350 TO 1920X1200 Plus Various Pal And NTSC Standards. Audio output 3.5mm jack, HDMI (high definition multi-audio / video interface) Onboard storage SD / MMC / SDIO card slot Network intervention No (you need to pass USB) 10/100 Ethernet interface (RJ45 interface) Peripheral 8 × GPIO, UART, I2C, with two selected SPI bus, + 3.3 V, +5 V, GROUND (negative poles) rated power 500 mA (2.5 w) 700 mA (3.5 w) power input 5V, head through MicroSB or GPIO Overall size 85.60 × 53.98 mm (3.370 × 2.125 in) operating system Debian GNU / Linux, Fedora, Arch Linux, RISC OS (currently these, the official is temporary, do not exclude other systems) Below we mainly look at the $ 35 version. The Raspberry Pi provides a simple programming environment. The main purpose of Raspberry Pi is to stimulate initiator's interest in programming, which provides two programming languages: scratch and python. The purpose of Scratch design is the learner for beginner programming. The Scratch programming environment is very visual, and can change the instructions in the program through the drop-down menu. Python is relatively, it is also a language that is more likely to learn, but to use it, further programming knowledge is needed.