LADS D1500 UPS Teardown Analysis
This teardown of a LADS D1500 UPS reveals a line-frequency inverter design with an H-bridge MOSFET circuit, transformer, and two 12V/9Ah batteries. Testing showed rapid battery degradation beyond warranty, ~77% conversion efficiency at 104W input, and ~18W no-load power draw. Readers gain insight into internal components, circuit topology, and real-world performance.
Teardown of ZTE F7015TV3 2.5G Optical Modem
The ZTE F7015TV3 2.5G optical modem offers a compact, low-power design with XGPON/XEPON support and a 2.5G port, achieving ~1200Mbps on gigabit broadband. However, it runs hot, reaching 74°C+ in warm cabinets and causing reboots; adding a fan stabilizes it at 52°C. Teardown reveals ZX279133 SoC, 512MB DDR3L, RTL8221B PHY, and ports including 2.5G, IPTV, and phone line.
Apple Mac Mini M4 Mini PC Review&Teardown - The Most Powerful Single-Core Performance Mini PCs
The article reviews and tears down the Apple Mac Mini M4, highlighting its compact redesign, strong single-core performance, and energy efficiency. Benchmarks show single-core scores surpassing Intel i9-14900, with idle power under 5W. It covers specs, storage speeds, thermal imaging, and teardown findings, noting affordable SSD upgrade options and excellent value.
Haikou-Beijing-Macau Travel Diary and Photo Sharing! Warning: Lots of Photos!
A 10-day graduation trip through Haikou, Beijing, and Macau, costing about 5,000 yuan per person, is documented with roughly 200 photos. It covers key sights, local food, transport details, ice skating, flag-raising, and Macau casino experiences, plus practical tips like advance reservations and Tsinghua’s lottery entry system.
iKuai IK-X9 Ceiling-Mount AP Simple Unboxing Review and Teardown, Tri-Band WiFi 7, BE5000, 2.5G Port
The iKuai IK-X9 is a tri-band Wi-Fi 7 ceiling AP (BE5000, 2.5G port). Testing shows 2x2 MU-MIMO limits performance: with two clients on 5.1GHz, per-device throughput caps near 800Mbps; no MLO or 6GHz in current firmware. A bug prevents connection if all three SSIDs match. Peak download reached 1696Mbps on 5.1GHz at 1m. Power draw 8-10W; aluminum backplate aids cooling. Overall, inferior to 4x4 Wi-Fi 6 APs.
Tencent Cloud Korea Lightweight VPS Performance Review: 2C1G, 200Mbps Unmetered Bandwidth Just ¥35/M
This article reviews Tencent Cloud’s Korea Seoul Lite Application Server during beta testing. Priced at ¥35/month for 2 cores, 1GB RAM, and 200Mbps unmetered bandwidth, it offers strong value. Benchmarks show moderate CPU performance; speed tests reached 805.95 Mbps download and 191.97 Mbps upload. Average latency across China’s three major ISPs was 110 ms, with Suzhou Telecom fastest at 35 ms. Inbound routes are mostly direct, while outbound may pass through the US. Email ports have limited availability.
iKuai IK-W35 In-Wall AP Unboxing Review and Teardown: Dual-Band WiFi 6 AX3000 with 2.5G Port
The iKuai IK-W35 is an 86-box in-wall Wi-Fi 6 AX3000 AP with a 2.5G PoE uplink and one gigabit LAN port. Teardown reveals two PCBs. In near-range testing, 5G throughput reached 1.57Gbps down/990Mbps up, but dropped sharply behind walls. Idle power is 4.5W, full load 12W. It supports AC management and up to 8 SSIDs.
Simple Unboxing and Review of the 2.5G PoE Switch TL-SE2109P: 8x 2.5G Ports + 1x 10G SFP+ Port
This article reviews the TP-LINK TL-SE2109P managed switch, featuring eight 2.5G PoE ports and one 10G SFP+ uplink. It covers unboxing, specifications, web/cloud management, power draw (5W idle, 11W with PoE device), and thermal imaging. The switch suits high-speed LAN deployments and PoE-powered access points.
RIHAO USB4 SSD Enclosure + HP FX900Pro 2TB SSD: A Simple Unboxing and Review
The RIHAO R40 Max USB4 enclosure and HP FX900Pro 2TB SSD were tested as an external Mac Mini boot drive to avoid costly Apple storage upgrades. The enclosure uses the ASM2464PD controller, while the SSD features 2GB DRAM cache and an InnoGrit IG5236 controller. However, the SSD’s 5.6mm thickness prevented proper fitting. In-enclosure speeds reached roughly 3.2GB/s read/write with acceptable thermals.
EG1151 High-Power Synchronous Buck-Boost Power Module (Supports Type-C PD Fast Charging) Open Source
An open-source high-power adjustable buck-boost DC-DC module based on the EG1151 chip is introduced, using fully domestic components. It supports Type-C PD3.1 up to 48V, XT60, and DC5.5 inputs, up to 63V and 20A, with overcurrent and over-temperature protection. Measured peak efficiency is 96.8%, though sustained current is about 18A. Schematics, PCB files, and 3D-printed enclosure models are provided.
RainCloud Review of Ningbo I7-14700HX Dedicated Server, 28 Cores 64G 500Mbps for Only 1588 RMB/Month
RainCloud's Zhejiang Ningbo bare metal server offers an i7-14700HX (20C/28T), 64GB RAM, 1TB SSD, and 500Mbps bandwidth for 1588 RMB/month, with annual discounts and custom options. Benchmarks confirm strong single-core performance, ideal for Minecraft. Includes 50Gbps defense, traffic carry-over, and a 7-day refund policy.
NanoKVM Unboxing, Review, and Teardown: Bringing BMC/IPMI Remote Management to Regular PCs
Sipeed's NanoKVM is a compact IP-KVM based on LicheeRV Nano, bringing server-grade remote management to desktop PCs and workstations without BMC. It captures video via HDMI, emulates keyboard/mouse and USB storage via USB, and offers network control over Ethernet. The Full version adds ATX power control and OLED display. Available as DIY-oriented Lite and plug-and-play Full, it supports remote desktops, BIOS access, OS installation, and serial ports, consuming only ~1.3W. With Tailscale support, users can manage hosts remotely without a public IP.
TL-SE2420 2.5G Switch Simple Unboxing Review: 16x 2.5G Ethernet Ports + 4x 10G Fiber Ports (SFP+)
A simple unboxing and review of the TP-LINK TL-SE2420 2.5G managed switch with 16x 2.5G Ethernet ports and 4x 10G SFP+ ports, replacing the previous T
iKuai IK-Q6000 WiFi6 Wireless Router: Unboxing, Review, and Teardown
The article covers unboxing, performance testing, and teardown of the iKuai IK-Q6000 WiFi6 router. Key hardware includes a MediaTek MT7986A quad-core CPU, 512MB RAM, 128MB flash, one 2.5G WAN port, and three Gigabit LAN ports. Speed tests show 5GHz downloads up to 1678 Mbps; idle power is about 7W. The author notes noticeably weaker signal than the TP-LINK XDR6088 despite similar chips, and identifies internal RF, Ethernet, and FEM components.
Java Implementation of 99 Multiplication Table — Using For Loop and Recursion
Java Implementation of 99 Multiplication Table For Loop public class ninenine { public static void main(String[] args){ for (int i=1;i<10;