Raspberry Pi : buying guide
You're more likely to hear about Raspberry PI and surely you are wondering what you need to start your projects, What equipment to buy, What are the differences between this or that model, How to choose food. I hope I can help you in your search.
If you are here is that you know surely that it is the Raspberry Pi but you're wondering what you need to equip you. I'll explain here what seems to me to be important and that at the end you know how to fill your basket !
The Raspberry Pi
Model A , Model B , model ft 2. That's what you have at your disposal. I will not give you the technical details of each but in outline :
The model A . The lighter, one who consumes the least, no Ethernet, a single USB port and the first prize. Highly recommended for embedded projects, less for use “Classic” At home.
The model B . 4 USB ports 2.0, an Ethernet port 10/100, always 40 GPIO, all that it takes to use it at home as small server.
The model Pi 2. The Rolls Royce of the Raspberry. Same price as the model B , Quad Core, 1GB memory and always 4 USB ports 2.0, an Ethernet port 10/100 and 40 GPIO
This is very important if you want to correctly use your Raspberry. A too low power will cause regular crashes with risks of corruption of the file system. The power supply to the micro-USB format shall issue at least 5V / 700My but I highly recommend that you have at least 1 has. The power supply can deliver more, a 1 fuse has in the Raspberry will protect. At home I use a charger delivering 2A.
The SD card
The choice of the map is very important for the use of Raspberry Pi. For the ability, This will of course depend on your needs but the miniamle capacity is 2GB. Ideally, 8GB capacity allows to work on the map while still have space available. Side performance, It is the class of the card that will make the difference. The number corresponds to the minimum flow rate in mb/s. For simplicity, You can buy a pre card installed as e.g. NOOBS, available on the official website of Raspberry.
Raspberry Pi is supplied without protection. The housing is not required but is highly recommended especially if you place it on a conducting surface. Many enclosures are available depending on the model. Alternatively, you can make your on a 3D printer for example or even with plans to cut in the carton.
Careful to choose your case depending on your use : electronic or not. Some housing are not output for the GPIO connectors, the camera or display port. So you can therefore quickly be bother with it.
The USB Hub
If you have multiple USB devices to be connected or if some consume a lot of energy (as a disk hard auto powered for example), you will need to go through a USB hub. It must be powered by an external source.
The Wi - fi key
To connect your Raspberry Pi network. Indispensable for models A have no Ethernet port.
The Ethernet cable
The cable may be necessary if you want to connect your Raspberry Pi (not the model A which has no Ethernet Jack)
If you do not use your Pi Raspberry in Headless mode, that is to say by you connecting remotely. The keyboard/mouse couple will be necessary if you want to use the Raspberry as a workstation for example.
The HDMI cable
If you do not use your Raspberry without screen, you will need an HDMI cable to connect it to a screen or a TV. Distributions as Raspbmc or OpenElec can control your TV if it supports the CEC. You can also handle you even with the libCEC library. If your screen has no HDMI connector, You can use a composite cable.
Element by really necessary in my opinion, It can however allow you to cool the CPU, especially if you have overclocked.
I hope that everything will now be able to help you get started in this great adventure !