The power interface of raspberry pie is

The power interface of raspberry pie is type-C.

Raspberry pie has 40 pins, mainly 3.3v, 5v, GND, GPIO and some communication-related pins. Among them, GPIO (General Input/Output) can realize signal detection (input) or high-low level output by pins through programs (such as python), and also can output PWM waves for subsequent speed control of brushless motors.

Raspberry pie only supports linux system, which is more professional than micro:bit, aduino and other open source hardware. "It is more complicated for primary school students, and junior high school is more suitable." The original educational intention of Raspberry Pie is to serve Linux and Python learners at a low price.

Interface and structure of raspberry pie;

1: SOC chip

Raspberry pie adopts Broadcom) bcm2711chip as SOC chip, which integrates CPU, GPU, DSP and SDRAM memory, in which CPU and GPU*** share memory, and the memory ratio can be manually modified in the system. The fourth generation of raspberry pie makes memory optional.

2. Ethernet interface

The Ethernet interface allows Raspberry Pie to access the computer network in a wired way, which makes it easy for us to access the Internet or log in to Raspberry Pie remotely. The Ethernet interface of Raspberry Pie is realized by USB bus, and the data is transmitted by USB bus. Most models of raspberry pie are equipped with Ethernet interface.

3: USB interface

Universal serial bus (USB) interface is the most common interface on computer, which can be used to connect keyboard, mouse, USB flash drive, wireless network card and other devices. When the number of USB interfaces is insufficient, the number of USB interfaces can be increased through USB hub.

4: HDMI interface

HDMI (High Definition Multimedia Interface) is an all-digital video and sound transmission interface for transmitting uncompressed audio and video signals. Connect it to a monitor (or TV) equipped with HDMI interface, and the contents of raspberry pie can be displayed.

The HDMI interface can transmit video and audio signals at the same time, so when we use it, we don't need to connect the speaker to the audio interface of Raspberry Pie. If we really need to play sound through the audio interface, we need to modify the configuration of the operating system accordingly.

5: Audio and Composite Video Interface

When the audio interface (3.5mm headphone jack) is not connected with HDMI, you can play audio with the speakers or headphones of the standard 3.5mm headphone jack. At the same time, the interface also integrates a composite video interface, which has a composite audio and video output function. Generally used to connect old TV sets, it is rarely used at present.