The wireless mouse has completely freed us from the constraints of wires, providing a more liberated control experience for both office work and gaming. Today, I present to you a guide for selecting Bluetooth mice that are guaranteed to be a hit, with rave reviews from users! 【Logitech M330 Silent Mouse】An essential tool for office … Read more
When it comes to Beyerdynamic, audio enthusiasts are likely familiar with this brand. Originating from Germany, this professional audio brand has been deeply involved in the headphone industry for nearly a century. Today, we will introduce nine representative headphone products currently available from Beyerdynamic, ranging from sports Bluetooth to professional monitoring, from HiFi in-ear to … Read more
Recently, I have been researching the Bluetooth protocol stack and came across an interesting fact. We know that Apple’s AirPods have ushered in a new era of true wireless Bluetooth headphones (TWS), currently dominating a large share of the market. Many domestic manufacturers have followed suit, but due to Apple’s registered patents, they find themselves … Read more
This article is about classic Q&A on ADC/DAC design, covering common issues such as clock duty cycle, common mode voltage, gain error, differential phase error, intermodulation distortion, and more. 1. What is Small Signal Bandwidth (SSBW)?Small Signal Bandwidth (SSBW) refers to the frequency at which the output amplitude drops to a specified value compared to … Read more
Any practical electronic application will be affected by multiple sources of error, which can cause even the most precise components to deviate from their specified behavior in the datasheet. When the application signal chain lacks built-in mechanisms to self-correct these errors, the only way to minimize their impact is to measure the errors and systematically … Read more
In the field of digital signal processing, the Nyquist sampling theorem establishes the fundamental criterion for signal digitization— to accurately reconstruct a continuous signal, the sampling frequency must be at least twice the highest frequency of the signal.However, engineers have observed an interesting phenomenon: in practical applications, we often generate signals exceeding 500MHz using a … Read more
1. IntroductionLet’s take a look at a diagramFriends who have read the previous blog post “The Execution Process of CPU Instructions” should have noticed that there is an indispensable component in the execution process of instructions in a computer, which is the bus. The diagram above shows multiple buses, and today we will introduce in … Read more
Content Hello everyone, I am Bug Jun~In industrial communication and embedded development, RS485 has become one of the mainstream buses due to its high anti-interference capability and multi-node support. However, many engineers often confuse two key signals when debugging RS485: DE and RTS. They both appear to be “control send” signals, and in some circuits, … Read more
The SPI (Serial Peripheral Interface) is one of the most widely used synchronous serial communication protocols in embedded systems, playing a crucial role in STM32 development. Compared to I2C and UART, SPI is particularly suitable for high-speed data acquisition, memory expansion, and display driving due to its full-duplex communication, high transmission rates, and hardware slave … Read more
Implementing the SPI (Serial Peripheral Interface) driver on the STM32 microcontroller for communication with sensors. The content includes SPI initialization, data transmission, error handling, debugging techniques, and the use of logic analyzers. The code is based on the STM32Cube HAL library, suitable for the STM32F4 series (such as STM32F407), and uses a generic sensor (like … Read more