개요 전원: CR2032 리튬 셀 (3V) 용도: 핀 연속성 테스트 및 패시브 USB 케이블 식별 지원 커넥터 조합: A면: • Type-C • Type-A / Type-A SuperSpeed B면: • Type-C • Type-B / Type-B SuperSpeed • Micro-B / Micro-B SuperSpeed • Mini-B • Lightning 테스터는 전원, 데이터, 설정, 실드 신호가 케이블 양쪽 끝에서 어떻게 연결되어 있는지 LED로 수동…
Author Archives: Elerain
제품 사양 및 사용자 매뉴얼 제품명: 1CH 5kV 아날로그 아이솔레이터 보드 모델명: 1CH-A-ISO 1. 일반 설명 1CH 5kV 아날로그 아이솔레이터 보드는 필드 아날로그 신호와 마이크로컨트롤러 시스템 간의 안전한 갈바닉 절연을 제공하도록 설계되었습니다. 이 보드는 온도 센싱, 전류 루프 인터페이스(4–20mA), **전압 입력 신호(0–3.3V, 0–5V, 0–10V)**를 지원합니다. 출력은 0–3.3V 또는 0–5V 범위의 절연 아날로그 신호를 제공하며, 이는…
When you create a new STM32G0 project in STM32CubeIDE, the debugger initially seems to work correctly. Code execution runs normally until the first interrupt occurs (in my case, the SysTick interrupt). At that moment the program counter suddenly jumps outside of the Flash memory space, so the debugger can no longer show valid source code corresponding to the PC value. At first…
Introduction The KT142C UART Control GUI (v9) is a comprehensive Python-based interface designed to control the KT142C audio module via UART. This GUI enables both manual operations and automated test sequences, offering a user-friendly yet powerful tool for audio playback, and device configuration. Built with wxPython for the graphical user interface and pySerial for serial…
High-Side Current Sensing Using Dual Current Mirrors — ZDS1009 Example The ZDS1009 datasheet includes an interesting high-side current sensing schematic that uses two matched current mirrors to translate the voltage drop across a shunt resistor into a ground-referenced output current. This implementation demonstrates an efficient analog method for high-side current measurement using only discrete transistors…
Conducted and Radiated EMI – Practical Troubleshooting Guide Understanding EMC, EMI, and EMS EMC (Electromagnetic Compatibility) The overall discipline ensuring that electronic devices and systems function properly in their electromagnetic environment without causing or suffering from interference. EMC = the ability to coexist with other electronics. EMI (Electromagnetic Interference) Any unwanted electromagnetic disturbance generated by…
Chinese engineers have developed a low-cost USB-Blaster equivalent tool based on CH552G microcontroller to work with INTEL (ALTERA) CPLD/FPGA. The problem is that the preloaded firmware doesn’t work reliably. CH552G is an 8-bit 8051 MCU that has a fair number of features for the price (<1$). Doug Brown posted a practical step-by-step guide for reflashing…
A simple, powerful method for finding weak points in your electronics Electrostatic discharge (ESD) is one of the most destructive and unpredictable threats in electronic systems. Even a tiny spark can corrupt data, reset a microcontroller, or permanently damage sensitive components. Professional ESD guns cost hundreds to thousands of dollars — but there is a…
Choosing the right diode is critical for optimizing efficiency, thermal performance, and switching behavior in modern power electronics. Two of the most common families—Schottky diodes and ultrafast recovery diodes—are often used in similar circuits, but their electrical characteristics make them ideal for very different applications. This article provides a clear engineering explanation of both types,…
How to safely interface 3.3 V and 5 V logic without specialized ICs In embedded systems, it is extremely common to connect devices that operate at different logic voltages. Many modern microcontrollers run at 3.3 V, while older devices, sensors, serial peripherals, and some modules still use 5 V logic. Although dedicated level-shifter ICs exist,…
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