Introduction to Common Peripherals of Power and Electronic Devices (Updated Regularly)

monitor

SSD1306

A common OLED driver chip, often used for the control of small-sized OLED displays

Communicate with MCU via I2C or SPI interface

SSD1306 typical initialization process of OLED
复位->驱动IC初始化代码->开启显示->显存清零->开启显示

8080 parallel port

The 8080 parallel port interface standard is characterized by the use of 8 data lines and some control lines, including enable signals, read and write signals, reset signals, etc.

storage card

Here are all types of memory cards and their corresponding uses

Memory cards can be divided into various types according to different standards and interface technologies. Common types of memory cards include:

1. SD card (Secure Digital Card): SD card is a memory card standard jointly launched by companies such as Toshiba, SanDisk and Panasonic. It has the characteristics of large capacity, fast speed and high reliability. It is widely used in digital cameras, mobile phones, etc. devices such as phones and tablets.
2. microSD card: microSD card is a small SD card, which is usually used in small devices such as mobile phones and tablets, and has the characteristics of small size and portability.
3. CF card (Compact Flash Card): CF card is a memory card standard developed by SanDisk. It has the characteristics of large capacity, high speed, and high reliability. It is widely used in digital cameras, video cameras and other equipment.
4. Memory Stick: Memory Stick is a memory card standard introduced by Sony Corporation. It has the characteristics of small size, high speed, and security. It is widely used in Sony brand electronic equipment.
5. XD card: XD card is a memory card standard jointly launched by Fujitsu and Toshiba. It has the characteristics of small size, high speed and high reliability, and is widely used in digital cameras and other equipment.
6. MMC card (MultiMedia Card): MMC card is a multimedia memory card, which is jointly developed by many companies. It is similar to SD card, but the interface is different. It has the characteristics of small size, low power consumption, and high speed. It is widely used in mobile devices, digital cameras, music players, etc.
7. SmartMedia card: SmartMedia card is an early memory card standard, introduced by Toshiba, with small capacity and slow speed, and has been gradually replaced by a new generation of memory cards such as SD cards.

SD

SD card (Secure Digital Card)

There are three types of SD cards corresponding to the three specifications
Standard SD card measures 32 x 24 x 2.1 mm
microSD card measures 15 x 11 x 1 mm
miniSD card measures 21.5 x 20 x 1.4 mm

SD card read and write speed description

• Class identifies the minimum read and write speed
• UHS Speed ​​Class identifies the highest read and write speed
• Video Speed ​​Class Proposed speed class for video

Two file systems are mainly used: FAT32, exFAT

SDThe capacity of the card is less than 2GB
SDHCThe capacity of the card is 2GB to 32GB
SDXCThe capacity of the card is more than 32GB

The SD card interface is usually 9-pin or 7-pin, of which the 9-pin interface supports both SPI and SD interface modes, and the 7-pin interface supports SDIO interface

CF

CF card is CompactFlash (Compact Flash Card)

Parallel data transmission mode, relatively fast read and write speed, faster than SD card and other storage media

Using static storage technology, not easily affected by magnetic field

The internal ECC (Error Correction Code) error correction technology can effectively reduce the data loss rate caused by media damage and other reasons

Memory Stick

translated as a memory stick

Using high-speed serial data transmission mode, the reading and writing speed is relatively fast, faster than storage media such as CF cards

Using static storage technology, not easily affected by magnetic field

Support data encryption

XD

A memory card developed by Fujitsu, mainly used inside digital cameras

The capacity of the XD card is relatively small, and the compatibility is relatively general, so it is gradually replaced by storage media such as SD cards in the market

The size of the XD card is only about 20mm×25mm×1.7mm, and the weight is less than 3 grams, which is smaller and lighter than SD cards and other storage media

MMC

MMC card (Multimedia Card, Multimedia Card) is a memory card based on flash technology

It is mainly used for audio and video data storage in digital cameras and MP3

Using serial data transmission, its maximum read and write speed can reach 20MB/s

MMC card has low power consumption and uses 3.3V voltage

Driver and Interface

L7805CV

The L7805CV is a commonly used linear voltage regulator chip, which is used to stabilize the input voltage as a 5V DC voltage. It is a three-pin forward regulator with fixed output voltage and high voltage stability.

The working principle of L7805CV is based on the feedback control circuit inside the regulator. When the input voltage is within the specified range, the voltage regulator will automatically adjust its internal circuit to keep the output voltage stable at 5V. It has functions such as overheat protection, overcurrent protection and short circuit protection, which can effectively protect the circuit and stabilize the output voltage.

The pin functions of the L7805CV are as follows:

1. Input Pin (Vin): Connect to the positive side of the input voltage.
2. Ground Pin (GND): Connect to the negative pole of the power supply and the ground of the circuit.
3. Output pin (Vout): Provides a stable 5V output voltage.

When using L7805CV, the input voltage needs to be connected to the input pin (Vin), the ground pin (GND) is connected to the negative pole of the power supply and the circuit ground, and the output pin (Vout) is connected to the part of the circuit that needs 5V power supply. When the wiring is correct, the L7805CV will stably output a 5V DC voltage for the circuit connected to the output pin.

SL2.1A

A convenient package for developing USB2.0 expansion interface

TYPEC-304-BCP16

TYPEC-304-BCP16It is a horizontal typec female component

Usually, the pin definition of Type-C connector is as follows:

1. VBUS: Power supply line, used to provide power to connected devices.
2. GND: Ground wire, used for current return and common ground reference of the circuit.
3. CC1/CC2: Communication lines, used to detect the insertion of the connector and support different communication protocols.
4. D+/D-: Data lines, used to transmit data signals.
5. SBU1 / SBU2: side wave lines, used to support additional functions or modes.
6. Configuration Channel (CC): Used to detect connector insertion and support different communication protocols.
7. It may also include other functional pins, such as external power supply, ground, clock lines, etc. The specific definitions of these pins may vary due to specifications and designs.

Since the detailed information of "TYPEC-304-BCP16" cannot be obtained, the pin definitions listed above are just general references and do not apply to specific models. If you need exact pin definitions, please refer to the relevant specification sheet, datasheet or product documentation for details.

CH340C

CH340C is a commonly used USB-to-serial port chip, it can convert the serial communication signal into the digital signal of the USB interface, and realize the data transmission between the serial port device and the computer; it is designed by WCH (Jiangsu Qinheng Microelectronics Co., Ltd.) and Production

CH340C chip has the following features and functions:

1. USB-to-serial port function: CH340C provides a full-featured USB-to-serial port interface, which supports common serial communication protocols, such as UART, RS232, RS485, etc. It enables the serial device to be directly connected to the USB interface of the computer without additional serial cables and serial ports.

2. High performance and stability: CH340C chip adopts advanced digital signal processing technology, has good performance and stability, and can stably carry out data transmission and communication.

3. Multiple working modes: CH340C supports multiple working modes, including full-duplex and half-duplex modes, to suit different application requirements.

4. Multiple interfaces: CH340C provides multiple interface options, such as USB Type-A, USB Type-C, etc., to facilitate connection with different types of computers and devices.

5. Compatibility and ease of use: The CH340C chip has good compatibility and can be seamlessly integrated with various operating systems (such as Windows, Mac OS, Linux) and development environments (such as Arduino), which is convenient for developers to develop and debug software and hardware .

sensor

Timers & Latches

NE555

communication

HC-05

HC-05 is a common Bluetooth module for wireless communication and data transmission. Based on the Bluetooth 2.0 specification, it is easy to use and low cost, and is widely used in various electronic devices and projects.

Below are some features and functions of the HC-05 Bluetooth module:

1. Bluetooth version: Based on the Bluetooth 2.0 specification, it supports Bluetooth Classic mode.
2. Communication range: The general communication range is 10 meters to 30 meters, depending on the environment and antenna quality.
3. Working frequency: Use 2.4GHz ISM frequency band for communication.
4. Communication interface: UART (serial port) interface is supported, which can communicate with microcontrollers or other devices through the serial port.
5. Supported transfer rates: Various transfer rates are supported, such as 9600bps, 38400bps, etc., depending on configuration settings.
6. Working mode: Support master-slave mode (Master/Slave), it can communicate with other Bluetooth devices as a master device or a slave device.
7. Pairing method: PIN code pairing and automatic pairing are supported, which can be configured as required.
8. Power supply voltage: generally 3.3V, but some modules may support 5V power supply.
9. Compatibility: Can pair and communicate with a variety of Bluetooth devices and mobile phones.

HC-05 Bluetooth module is often used in wireless serial communication, Bluetooth remote control, sensor data transmission, smart home and other application scenarios. It provides a simple and reliable wireless connection solution, making data transmission between devices more convenient. To use the HC-05 module, you need to know its interface and AT command set to configure and control the module's functions.