The most beggar keyboard set modification

firmware.zip

esplay shell.zip

BOM download

PCB_PCB_ESP32_GAME_TF_2022-09-23.pdf

PCB_PCB_ESP32_GAME_TF_2022-09-23.json

PCB_ESP32_GAME_TF_2022-09-23.pcbdoc

Gerber_PCB_ESP32_GAME_TF.zip

Schematic_ESP32 game console_2022-09-23.pdf

SCH_ESP32 game console_2022-09-23.json

Sheet_2 copy_2022-09-23.schdoc

61835

Desktop fast charging source module

Introduction: PL5500 is a four-tube bidirectional buck-boost controller designed for mobile power supplies, batteries and other applications. It provides high efficiency, high cost-effectiveness, simple peripherals and protection functions for buck-boost application markets such as TYPE-C PD fast charging. Complete high-power application solutions.

PL5500是一款为移动电源，电池等应用场合设计的四管双向升降压控制器，为TYPE-C PD快充等升降压应用市场提供高效率，高性价比，外围简单，保护功能齐全的大功率应用方案。
 
PL5500是双向同步4开关降压 - 升压控制器能够调节输出电压在输入电压，高于或低于输入电压。
PL5500可在宽输入电压范围内工作3.0 V至30 V（36 V），支持多种功能应用。
PL5500可以在充电器模式下运行用于1,2和3节电池充电。
PL5500采用恒定开启时间控制降压和升压操作模式可实现出色的负载和线路监管。开关频率设置为基于200kHz，400kHz或600kHz的不同FREQ引脚和AGND引脚之间的电阻值。
该器件还具有可编程软启动功能和提供各种保护功能，包括逐周期电流限制，输入下电压锁定（UVLO），输出过压保护（OVP）和热关断。此外，PL5500具有可选的连续传导功能模式（CCM）或不连续传导模式
（DCM）操作，可选的平均输入或输出限流，折返模式保护持续的过载情况。
PL5500还具有动态电压和动态输出电流限制功能由PWM输入信号逐渐调整。
 
高性价比PL5500外围电路简单，设计灵活性强，驱动能力强，可支持大功率应用，支持双向充放电管理，集成度高，降低BOM成本，COT控制模式，保证产品稳定性和一致性，可编程频率调节，可同时满足PW和模拟调节，效率高达98%以上。
 
PL5500功能特性：
支持正向的充电和反向的放电管理
通过PWM动态调节输出电压
通过PWM动态调节输入和输出电流
3.0V-30V的超宽输入电压范围
0.8V-30V的超宽输出电压范围
集成2A 10V的驱动器
内部集成5V/50MA LDO
开关频率可调
支持1-6串锂电池升降压充放电
可编程连续电流模式和轻载高效率模式
输入欠压，输出过压，输出短路，过温等多种保护功能
QFN4*4-32封装

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BOM下载

PCB_PL5500_2022-09-23.pdf

PCB_PL5500_2022-09-23.json

PL5500_2022-09-23.pcbdoc

Gerber_PL5500.zip

Schematic_桌面快充电源模块_2022-09-23.pdf

SCH_桌面快充电源模块_2022-09-23.json

桌面快充电源模块_2022-09-23.zip

61836

AI智能离线语音空调万能红外遥控器

简介：DIY制作一个智能AI离线语音识别红外万能遥控器
低成本

支持小程序蓝牙控制仅需购买一个语音识别模块，外加红外发射管
模块隐藏彩蛋：可连接手机或者电脑蓝牙做蓝牙音箱使用，当然你需要接一个音质好一点的喇叭。
语音指令使用说明书https://docs.qq.com/pdf/DTmJRS3JucHhxalFuAI模块购买地址https://item.taobao.com/item.htm?id=678936604591

IR.mp4

空调控制.mp4

61837

智能离线语音空调风扇等万能红外遥控器6元芯片方案

简介：本次采用芯片方案，白漂板子，可以9元做一个智能离线语音万能红外遥控器

6元离线语音芯片方案，自带红外码库，可控制各种品牌空调，风扇等支持蓝牙小程序对接，为了方便焊接，电阻元件为0603封装6元离线语音芯片链接：https://item.taobao.com/item.htm?id=678936604591
语音指令使用说明书https://docs.qq.com/pdf/DTmJRS3JucHhxalFu

空调控制.mp4

61838

2021年D题-基于互联网的摄像测量系统+yyds队

简介：本设计基于图像识别原理设计并制作了基于互联网的摄像测量系统。系统以树莓派为核心处理终端，通过一个百兆以太网交换机与两个摄像节点实现星型互联网络，完成鱼线和激光笔组合的摆动角度及长度的测量和实时显示。

Contents
1. Foreword
2. Team introduction
3. Project analysis
4. System solution
5. Theoretical analysis and calculation
6. Circuit program and design
7. Physical display
8. Description of competition works
9. Summary
 
 
 
Preface
  This design is designed based on the principle of image recognition and An Internet-based camera measurement system was produced. The system uses Raspberry Pi as the core processing terminal, realizes a star interconnection network through a 100M Ethernet switch and two camera nodes, and completes the measurement and real-time display of the swing angle of the fishing line combined with a laser pointer and the length of the fishing line. The system first uses the CMOS sensor module to realize the camera function; then uses the k210 chip to complete the identification and positioning of the laser pointer; then uses the pendulum-related formula to calculate the length of the fishing line and the offset angle of the laser pointer, and finally uses the LCD to display the measurement results and sound. Light alarm. Tests have proven that the absolute error of this system in measuring fishing line length is less than 1cm, the absolute error in laser swing angle measurement is less than 5°, and the measurement time is less than two seconds. 
 
Keywords: Internet; angle measurement; length measurement; Raspberry Pi; k210
 
 
team introduction.
The team members are Xiao Xiaowu, Zhang Haohao, and Xiao Tutu. Their major is electronic information engineering. They are senior students. Team members are good at image processing. , Proficient in using stm32, k210, openmv, Raspberry Pi, etc. While in school, he worked on a number of scientific research projects and innovation and entrepreneurship projects for college students, and has multiple software copyrights.
Award experience:
(1) National Second Prize in the 2021 National College Student Electronic Design Competition
(2) Provincial Third Prize in the 2020 Hubei Provincial Electronic Design Competition
(3) Successful Participation Award in the 2019 National College Student Electronic Design Competition
(4) Thirteenth The third prize in the Central and Southern Regional Competition of the 2018 China College Student Computer Design Competition
(5) The second prize in the finals of the 4th National College Student FPGA Innovation Design Competition
(6) The second prize in the 2021 National Electronic Design Competition National Second Prize "Internet-based Camera Measurement System" ( 7) The third prize in the national competition of the 2021 Computer Design Competition (8) The second prize in the national competition of the 2020 Blue Bridge Cup National Software and Information Technology Professional Talents Competition (9) The 2021 National College Student Innovation and Entrepreneurship Project "Epidemic Prevention and Disinfection Based on Stm32" Killing Drones" (10)
Project Analysis for Participating in the National College Student Innovation and Entrepreneurship Annual Conference in 2021
1. Question Requirements
1. Basic Requirements
(1) Design and produce two independent camera nodes, each node consists of