3.5 Power Adapter and Power Supply Cable
Raspberry Pi can supply electricity of 5.1V DC power via Micro USB socket. To supply power to the Raspberry Pi, you first need a power cable that supports the Micro USB socket. It is commonly used in mobile phones, so it can be easily obtained from around, or it can be shared with mobile devices.
3.4.2 External Mass Storage Device
Raspberry Pi can use an SD card as a storage device, but SD cards usually have a limited storage capacity, so if you need to store a large volume of data, you need an external storage device. If you want to use such an external storage device, you need to connect it to a USB port.
.4.1 SD Card
As Raspberry Pi is designed to install operation system on the SD card, SD card is essential.
When purchasing an SD card, the capacity should be at least 4 GB, and it is recommended t use usually 8 GB or more. In some cases, you might want to use a 16 GB or 32 GB SD card if you want to install a lot of programs or to save a lot of data on your system.
3.3 Heat Sink
Raspberry Pi adopts the ARM processor. The power consumption of these CPU, GPU, etc is very low, and there is almost no heat in normal operating environment, so Raspberry Pi is designed from the beginning so that it does not need extra cooling function like cooling fan.
3.2 Body Case
The size of Raspberry Pi body is very small. The main board is provided with four holes for fixing the main board, so that it can be fixed to another machine or equipment. However, since there is no part to protect the board itself, it can be damaged from external contact or impact. Therefore, we need a case that physically protects the board and protects the board from dust and pollutants from the outside.
.10 External Interface
Raspberry Pi can communicate with and control devices outside the system through a bidirectional interface with external devices. It can receive input or output through an external device, or adjust an external device. A key device for this is the GPIO (General Purpose Input Output) port. Here, I will briefly mention the preparations required to use this GPIO. For details, refer to [Chapter 25 External Interface]:
3.1 Selection of Raspberry Pi Model
When purchasing Raspberry Pi, you should clarify the purpose of use. If you want to use it only for a limited purpose, you can use a lower model that has a relatively low processing power. However, if you want to use it as a general purpose just like general PC, you will have to use the latest upper model that have various advanced features and high level processing.
Chapter 3 Buying & Installing Device/Part
Chapter’s Main Topics
Here this chapter will find out what devices are needed to operate Raspberry Pi and how to connect them to Raspberry Pi.
It includes descriptions on the following topics:
■ Selection of Raspberry Pi model
■ Body case and heat sink
■ Storage device
■ Power supply device
■ Network device
■ Input device
■ Video output
■ Camera
■ External interface device