OWON HDS160 Oscilloscope Multimeter: Unboxing, Review, and Teardown
The article presents a hands-on unboxing, review, and teardown of the OWON HDS160, a 4½-digit handheld oscilloscope multimeter purchased for 365 RMB. Its main appeal is the built-in 1 MHz oscilloscope that works with standard multimeter test leads, enabling direct voltage or current waveform measurement and automatic detection of the input jack to switch ranges. Key specifications include 60000-count display, DC voltage accuracy of ±(0.05%+5 digits), CAT III 1000 V safety rating, 2.8-inch IPS screen, and a single 18650 battery. Field tests cover USB voltage, AC mains waveform (50 Hz, 328 V peak, 232 V RMS), STM32 board inrush current, and low-power current measurements. The teardown reveals an HC32F460PETB MCU, HY3131 multimeter front-end, MAX6006AESA voltage reference, SGM41511 charger, GD25Q128ESIG flash memory, and infrared components for jack detection. The author notes a slightly crooked Type-C port and a clock that resets when the battery is removed. Readers gain insight into the device’s capabilities, component choices, internal construction, and practical limitations, useful for evaluating its suitability for low-frequency electrical and embedded debugging tasks.
Hiking Yangtai Mountain in Shenzhen
A Shenzhen hiking trip to Yangtai Mountain is documented with photos. The article covers the mountain’s location, its status as western Shenzhen’s highest peak (main peak 587.1m), scenic landmarks, and revolutionary history as an East River Column base. Images were shot with a Huawei Mate 70 Pro+ and DJI Action 6, compressed to WebP, alongside links to other travel photo essays.
Hiking Notes of Wutong Mountain in Shenzhen & Shenzhen Sunset Photos
The author recounts a December 6, 2025 hike up Shenzhen’s Wutong Mountain with friends. The route ascended via Xiutong Road from the metro station, summited Da Wutong (943.7 meters), and descended via Haohan Slope and Lingyun Road. Lingyun Road is steep and narrow, so ascending there is discouraged. The post shares compressed WebP photos of the scenic national park.
Discourse Forum Setup Tutorial: Zero-Base Deployment of Discourse Open Source Community Forum
本文介绍了如何基于Linux系统，借助宝塔面板和Docker技术，快速搭建国际流行的开源论坛软件Discourse。文章详细说明了Discourse的核心优势，包括实时交互、移动友好、信任等级系统、强大的搜索功能和丰富的插件生态，并指出其适用于企业社区、兴趣社群和内部协作等多种场景。教程核心部分涵盖从云服务器准备、宝塔面板安装与配置、Docker环境部署，到Discourse源码拉取、配置文件编辑（涉及端口映射、域名、管理员邮箱及SMTP设置），再到通过反向代理配置网站并申请SSL证书，最终完成论坛部署与管理员账号激活的全过程，为零基础用户提供了一条清晰的建站路径。 **摘要要点：** - **目的**：为零基础用户提供一站式Discourse论坛搭建方案。 - **核心组件**：Linux服务器、宝塔面板（简化服务器管理）、Docker容器、Discourse源码。 - **关键步骤**：配置Discourse（端口、域名、邮箱等）、通过宝塔设置反向代理与SSL证书。 - **成果**：成功部署一个具备基本功能且支持HTTPS的安全论坛网站。
Discourse AI Configuration Tutorial: Using SiliconFlow API to Enable AI Features for Free
这篇教程详细介绍了如何为Discourse论坛启用和配置AI功能，主要包括AI搜索、AI翻译及AI相关话题推荐等。文章基于官方指南和实际部署经验，使用SiliconFlow作为AI服务提供商。配置过程分为三大步骤：首先启用Discourse AI插件；其次分别设置LLM（大语言模型）和Embedding（嵌入模型），包括填入API密钥、服务端点和模型参数；最后开启各项AI功能，如AI助手、内容摘要、自动翻译和语义搜索等。这些功能可提升社区管理效率、增强用户体验并保障数据安全。教程还附带了演示站点和相关资源链接供参考。
Hiking Trip to Bijia Mountain in Shenzhen: Shenzhen Sunset & Night View Photos
The post shares photos from a hike at Bijia Mountain Park on October 25, 2025. The park is only about 100 meters high and has two main peaks, Biguan and Bijun, each equipped with observation decks offering views of the sunset and urban nightscape. The images were taken with a Huawei Mate 70 Pro+ and compressed to WebP format. The article also links to the author's other travel photo essays and tech-related posts for further reading.
BenQ RD280U Review: 28" 4K 3:2 Professional Programming Monitor
The BenQ RD280U is a 28.2-inch 4K programming monitor with a 3:2 aspect ratio, showing about 20% more lines than typical 16:9 displays. It offers dedicated coding modes, KVM switching, 90W USB-C power delivery, and MST daisy-chaining. Hardware low blue light and MoonHalo ambient lighting aim to reduce eye strain. Measured sRGB coverage was 96.2% with average Delta E 2.23, though blue accuracy is limited. The monitor is well-suited for programmers wanting multitasking efficiency, multi-device control, and long-session comfort.
DJI Mini 2 Drone Teardown Analysis
这篇摘要总结了作者对使用四年的DJI Mini 2无人机进行拆解和问题分析的全过程，字数控制在200字以内。 --- 一篇关于大疆Mini 2无人机的拆解分析文章。作者因无人机5.8GHz图传信号变弱，在过保后决定自行拆机维修。文章详细记录了拆解步骤，并对关键芯片进行了技术分析：主控采用NXP的i.MX RT1064处理器；图像处理由安霸Ambarella H22芯片负责；图传系统核心为DJI定制的S1系列芯片，并由QPF4205和QPF4550分别放大2.4GHz和5.8GHz信号（怀疑故障源于后者）；此外，还解析了电机驱动、电源管理及ToF测距等模块的芯片配置与功能。此次拆解旨在排查并更换故障的5.8G功放芯片，修复图传问题。
Open Source 24V3A Flyback Power Supply Based on UC3842, with Transformer Parameter Calculation
An open-source 24V 3A flyback switching power supply design for 85–265VAC input, achieving 87.4% peak efficiency. Based on UC3842 with synchronous rectification, it provides schematics, PCB files, transformer calculations and specifications, and PSIM simulation models. Test data shows 83–87% efficiency, 1.81W no-load consumption, and ripple around 560–730mV. Full-load thermal performance requires heatsinking.
Flyback Power Supply Design: Parameter Calculation, Component Selection & Transformer Winding Guide
This article presents a complete design procedure for a 72W flyback switching power supply (24V/3A) with universal 85-265VAC input. It provides step-by-step calculations for rectifier bridge, input filter, transformer magnetizing inductance and turns, wire selection with skin effect, MOSFET and output diode ratings, output capacitor, and RCD snubber. Key trade-offs such as frequency vs. efficiency, flux density selection, and core AP value are explained. The article also details practical transformer winding, including air gap adjustment and leakage inductance measurement, enabling readers to replicate the design.
![Minecraft Modpack [Mori Garden] Multiplayer Server Setup Tutorial — Hosting MC Server on Linux](https://tc2.zeruns.com/2025/10/06/image-20251006180105918f5228bd5b8514690.png)
Minecraft Modpack [Mori Garden] Multiplayer Server Setup Tutorial — Hosting MC Server on Linux
This guide explains how to host a Minecraft Mori Garden modpack multiplayer server on Linux using MCSManager 10 and Docker. It covers downloading the client and server packages, selecting a high-performance VPS with at least 4 cores and 8 GB RAM, installing MCSM and Docker, creating an OpenJDK 17 image, importing the server archive, enabling Docker containerization, and editing server.properties. Mori Garden is a peaceful farming-themed Forge 1.20.1 modpack. Readers learn to start the server, connect using IP and port, and grant OP privileges, enabling a relaxing rural Minecraft experience with friends.
WCH CH224K Fast-Charging Protocol Chip: Function Changed but Model Number Remains Unchanged?
WCH’s CH224K datasheet revision (V1F to V2.1) removed single-resistor voltage configuration, disallowing floating CFG pins for 20V requests. This silently breaks existing designs relying on that method. WCH now recommends CH224A, which supports single-resistor mode but requires a 120kΩ resistor for 20V, complicating direct replacement without extra pads. The article questions whether such functional changes warrant a new model number.
Travel Log and Photo Sharing from Nan'ao Island!
The author recounts a post-typhoon weekend road trip to Nan'ao Island with college roommates. Clear skies after rain created ideal photography conditions, and sparse crowds kept traffic light on the usually congested two-lane bridge. Highlights include the Tropic of Cancer landmark, Haiquan Bay, and the scenic coastal ring road. However, driving in Shantou demanded extreme caution due to unpredictable e-bikes. All photos were taken using a DJI Pocket 3 and a Huawei Mate70 Pro+.
GL-RM1PE Unboxing, Review, and Teardown: Enabling BMC Remote Management on a Regular PC
A simple unboxing, review, and teardown of the GL-RM1PE and the FGB-01 Finger Robot, enabling BMC-style remote management on a regular PC. Review vide
Magnetic Components/Magnetic Core Materials & Structures: Analysis, Comparison & Selection Guide
This article provides a systematic guide to magnetic core selection for power electronics, covering key parameters (permeability, saturation, core loss, Curie temperature), comparing materials like ferrite, sendust, permalloy, amorphous and nanocrystalline alloys, and reviewing core structures (EE, PQ, toroidal). It offers engineering recommendations for AC/DC, DC/DC, PFC, and inverter applications, emphasizing frequency matching, loss control, and cost balance. Engineers gain practical reference for choosing cores.