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[Open Source] IP Query Web — IP Geolocation Lookup, My IP, Domain Resolution
Web

[Open Source] IP Query Web — IP Geolocation Lookup, My IP, Domain Resolution

An open-source IP geolocation query system built on the CZ88/Pure IP database is presented. It supports IPv4/IPv6 lookup, domain resolution, client IP detection, batch queries, and RESTful APIs with JSON or plain-text output. Deployment options include bare-metal Node.js, Docker, and Baota panel. Features include weekly automatic database updates, CLI tool, bilingual UI, site statistics, multi-layer security (CC protection, rate limiting, security headers), and CDN/Nginx real-IP support. Users can self-host a private lookup service, integrate the API into applications, or study Node.js/Express architecture.

Published on 2026-05-27
[Open Source] PD65W GaN Charger (ACF), Based on DK8607AD, IP6538-AC-65W, XPM52CDP65
Electronics / Circuits

[Open Source] PD65W GaN Charger (ACF), Based on DK8607AD, IP6538-AC-65W, XPM52CDP65

An open-source 65W PD GaN charger design is presented, combining a DK8607AD-based Active Clamp Flyback (24V/3A) supply with IP6538 or XPM52CDP65 fast-charging DCDC boards. The GaN flyback boards failed during testing, while DCDC boards delivered up to 67.7W with ~95–96% efficiency. Schematics, PCB files, transformer specs, and fabrication materials are provided.

Published on 2026-03-02
Flyback Power Supply Design: Parameter Calculation, Component Selection & Transformer Winding Guide
Electronics / Circuits

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.

Published on 2025-10-13
Open-Source USB 10 Gbps Hub with 2.5 Gbps Ethernet & TF/SD Card Reader (VL822+RTL8156BG+GL3224)
Electronics / Circuits

Open-Source USB 10 Gbps Hub with 2.5 Gbps Ethernet & TF/SD Card Reader (VL822+RTL8156BG+GL3224)

An open-source USB-C dock integrates four 10Gbps USB-A ports, 2.5G Ethernet, and TF/SD readers using VL160, VL822, RTL8156BG, GL3224. It accepts 4-20V input, buck-boosts to 5.1V with up to 9.5A, supporting PD fast charging. Tests show USB read/write 969.65/912.65 MB/s, Ethernet 2089/2497 Mbps, card read 93.04 MB/s, efficiency up to 91.79%. Schematics, PCB files, and replication notes are provided.

Published on 2025-04-29
EG1164 High-Power Synchronous Rectification Boost Module Open Source with 97% Peak Efficiency
Electronics / Circuits

EG1164 High-Power Synchronous Rectification Boost Module Open Source with 97% Peak Efficiency

The article presents an open-source EG1164-based synchronous rectification boost converter module supporting 8–50V input, 8–60V adjustable output, and 219kHz switching. Test results show up to 97.3% efficiency and 287W output at 8A, with potential beyond 300W. It includes schematic, PCB layout, ripple measurements, and component purchasing guidance.

Published on 2025-02-16
Open-Source Three-Phase Energy Meter: Simplifying Home Electricity Monitoring
Electronics / Circuits

Open-Source Three-Phase Energy Meter: Simplifying Home Electricity Monitoring

An open-source three-phase power meter for home energy monitoring uses three PZEM-004T modules with an ESP32-C3 running ESPHome, uploading voltage, current, power, power factor, and energy data to HomeAssistant over Wi-Fi. It measures 80–260V per phase, up to 100A, with 0.5% accuracy. Design files, firmware, and enclosure models are provided.

Published on 2025-02-15
Open-Source Smart Electronic Load Based on CH32V307, Embedded Competition Project Open Source
Electronics / Circuits

Open-Source Smart Electronic Load Based on CH32V307, Embedded Competition Project Open Source

An open-source smart electronic load based on the CH32V307VCT6 microcontroller is presented, developed as a national second-prize entry in the 2023 embedded design competition. It supports constant current, voltage, resistance, and power modes, with 100V/10A/200W ratings. Schematics, PCB files, source code, and reports are freely available for learning and reference.

Published on 2025-02-06
EG1151 High-Power Synchronous Buck-Boost Power Module (Supports Type-C PD Fast Charging) Open Source
Electronics / Circuits

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.

Published on 2025-01-16
Open-Source 140W+65W Buck-Boost PD3.1 Fast-Charging Module (2C+1A Ports), IP6557+IP6538,
Electronics / Circuits

Open-Source 140W+65W Buck-Boost PD3.1 Fast-Charging Module (2C+1A Ports), IP6557+IP6538,

An open-source 205W buck-boost fast-charging module based on IP6557 and IP6538 is presented, offering 140W on one Type-C port with PD3.1 support and 65W on the second Type-C and Type-A ports. Maximum conversion efficiency reaches 96.7%. Full documentation and design files are provided, enabling users to replicate a cost-effective charger.

Published on 2024-11-16
Synchronous Rectification Buck-Boost Digital Power Supply Based on STM32
Electronics / Circuits

Synchronous Rectification Buck-Boost Digital Power Supply Based on STM32

This article presents an open-source four-switch Buck-Boost digital power supply based on STM32G474, supporting Type-C PD and DC input up to 48V10A and 450W. It includes schematic, PCB, firmware, and 3D model files. The design offers adjustable output, OLED display, protections, and host monitoring, achieving up to 94.3% efficiency and low ripple. Users can access calculations and source code.

Published on 2024-11-12

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