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The following are articles related to Study Notes

2025-10-13
Open Source 24V3A Flyback Power Supply Based on UC3842, with Transformer Parameter Calculation Open-sourcing a wide input voltage, 24V 3A output flyback switching power supply. This 72-watt design achieves a peak efficiency of 87.4% and is based
- 2025-10-13
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- Electronics / Circuits
2025-10-13
Flyback Power Supply Design: Parameter Calculation, Component Selection & Transformer Winding Guide This article uses a 72-watt flyback power supply with a wide-range voltage input (24V, 3A output) as an example to demonstrate the calculation of circ
- 2025-10-13
- 4
- 0
- 2
- Electronics / Circuits
2025-09-27
WCH CH224K Fast-Charging Protocol Chip: Function Changed but Model Number Remains Unchanged? Has WCH Changed the Functionality of the CH224K Fast-Charging Protocol Chip Without Changing Its Model Number? In the 1F version of the datasheet, the
- 2025-09-27
- 6
- 0
- 1
- Electronics / Circuits
2025-09-10
Magnetic Components/Magnetic Core Materials & Structures: Analysis, Comparison & Selection Guide Magnetic Components / Magnetic Core Materials / Core Structures Comparison and Selection Guide In magnetic component design, the magnetic core is the
- 2025-09-10
- 6
- 0
- 1
- Electronics / Circuits
2025-07-03
Disassembly and Circuit Design Analysis of ZGRL-80 Photography Light ZGRL-80 Photography Light / Portable Handheld COB Fill Light – Detailed Teardown and Circuit Analysis Disassembly video: https://www.bilibili.com/vide
- 2025-07-03
- 41
- 0
- 1
- Electronics / Circuits
- Reviews & Teardown
2025-04-29
Open-Source USB 10 Gbps Hub with 2.5 Gbps Ethernet & TF/SD Card Reader (VL822+RTL8156BG+GL3224) Open-sourcing a USB3.2 expansion dock with Type-C input: 4 USB3.2 Gen2 ports + 2.5G Ethernet + TF/SD card readers, supports PD fast charging for auxil
- 2025-04-29
- 57
- 0
- 1
- Electronics / Circuits
2025-02-16
EG1164 High-Power Synchronous Rectification Boost Module Open Source with 97% Peak Efficiency EG1164 High-Power Synchronous Rectification Boost Converter Module – Up to 97% Efficiency, Input Voltage 8~50V, Adjustable Output Voltage 8~60V, Maxim
- 2025-02-16
- 18
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- 2
- Electronics / Circuits
2025-02-15
Measured Comparison of Capacitors and Inductors Across Different Brands and Types (D, Q, ESR, X) Recently, I purchased an LCR bridge and decided to measure and compare the parameters of various capacitors and inductors I have on hand. The testing
- 2025-02-15
- 22
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- 1
- Electronics / Circuits
2025-02-15
Open-Source Three-Phase Energy Meter: Simplifying Home Electricity Monitoring Built a Three-Phase Power Meter for Home Energy Monitoring This device can measure three-phase current, voltage, power, power factor, and energy consu
- 2025-02-15
- 25
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- 2
- Electronics / Circuits
- Internet of Things / Embedded
2025-02-06
Open-Source Smart Electronic Load Based on CH32V307, Embedded Competition Project Open Source Open-source smart electronic load based on CH32V307VCT6, embedded competition project open source, including schematic diagrams, PCB, program source c
- 2025-02-06
- 33
- 0
- 1
- Electronics / Circuits
- Internet of Things / Embedded
2025-01-16
EG1151 High-Power Synchronous Buck-Boost Power Module (Supports Type-C PD Fast Charging) Open Source We are open-sourcing a fully domestic high-power adjustable buck-boost DC-DC power module based on the EG1151 chip. It supports Type-C input, includes
- 2025-01-16
- 55
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- 1
- Electronics / Circuits
2024-12-28
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;
- 2024-12-28
- 30
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- 1
- Java
2024-12-28
Python Formatted Output (% and format Usage) Integer Output %o—Octal (Base 8) %d—Decimal (Base 10) %x—Hexadecimal (Base 16) Floating-Point (Decimal) Output Formatted Output >>> awsl = 2.333 >>> p
- 2024-12-28
- 23
- 0
- 1
- Python
2024-11-24
What is dB? How to Calculate dBm, dBc, dBi, and dBd, and What Are Their Differences? What is dB? How to calculate dBm, dBc, dBi, and dBd, and what are the differences? Introduction In the fields of electronics, communications, and audi
- 2024-11-24
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- Electronics / Circuits
2024-11-21
[Study Notes] Trigonometric Functions (Sine, Cosine, Tangent) The sine function and cosine function are the two most fundamental and significant functions in trigonometry. They have extensive applications in desc
- 2024-11-21
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- Study Notes

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