Raspberry Pi is a credit card sized computer. It’s basically a small PC which provides all the basic functions that are provided by a desktop PC. For example, it provides functions like word processing, gaming and playing audio/video. It has become a widely used device for learning programming since last one year. The Raspberry Pi is a 3.370 X 2.125 motherboard with a 700 MHz CPU and a 250 MHz GPU. The Ethernet LAN port is present for internet and remote access. It also has an HDMI port, through which it can be connected to any display device, like the monitor or the projector. Another great facility which Raspberry Pi provides is the presence of two USB ports, where one can connect his pen drive …show more content…
The Raspberry Pi is a credit-card-sized (86 x 56 mm) single-board and low-cost computer (Fig.1) developed by the Raspberry Pi Foundation (supported by the University of Cambridge Laboratory and Broadcom Corporation) with the intention of promoting the teaching of basic computer science in schools . The comparatively low price and the relatively large possibilities of the central unit resided in, caused the Raspberry Pi being often used not only for educational purposes but also (individually or in sets) in steering processes or measurement systems.
Fig. 1. Raspberry Pi Model B.
The module of the Raspberry Pi microcomputer is based on the Broadcom BCM2835 SoC unit. Generally, the SoC (system - on - the chip) defines the structure that includes a complete microprocessor system, so there is the central unit (CPU), FLASH or ROM, EEPROM and RAM memory, digital and analog devices, and also the analog-to-digital and digital-to-analog converters, as well as serial interfaces. In distinction from the microcontroller, SoC devices are equipped with central units with comparatively large computational power, making it possible to run the …show more content…
The fact of missing clock can be worked rounded using a network time server, and most operating systems do this automatically.
_ The Raspberry Pi always boots from an SD card. It means that even a perfectly valid installation of an operating system is available on a USB stick or an external hard drive, it can’t be booted. In other words, external storage devices can be used but can’t be used to boot the Raspberry Pi.
_ It does not support Bluetooth or WiFi out of the box but these supports can be added by USB dongles.
_ Unfortunately, most Linux distributions are still a bit picky about their hardware, so it should be first checked whether flavor of Linux supports particular device.
_ It doesn’t have built-in an Analog to Digital converter. External component must be used for AD conversion.
_ Its power consumption varies depending on how busy Raspberry Pi is and what peripherals are connected.
Typically, the model B uses between 700-1000 mA depending on what peripherals are connected, and the model A can use as little as 500 mA with no peripherals attached. Thus, it is necessary to provide a power supply that can provide enough current to power the device plus any connected peripherals.