Continuing from the article on April 26 (Finding Patterns in Financial Records: Part 6 – The ABC Model of the Bear Market is Due to the A-Share Market Being a Chip Market), today I will continue with the seventh article in the series. The Shanghai Composite Index fell from 1558 points on February 16, 1993, … Read more
1. National Safety Standards for Wi-Fi Radiation.1) According to the safety limits set by the International Commission on Non-Ionizing Radiation Protection, the safe radiation range for the human body is “10 watts/square meter”.2) The electromagnetic wave frequency range of Wi-Fi signals is generally from 2.4 GHz to 5 GHz, which is quite close to the … Read more
Health Chengdu Official Account The public account that Chengdu people are paying attention to Follow What is radiation? Does Wi-Fi emit radiation? Radiation refers to energy that spreads from its source into space in the form of waves or particles. Radiation that exists in wave form is a type of electromagnetic wave, which can be … Read more
What is Radiation? Does Wi-Fi Emit Radiation? Radiation refers to the energy that spreads from its source into space in the form of waves or particles. Radiation that exists in wave form is a type of electromagnetic wave, which can be classified into the following categories based on frequency, from low to high: static electricity, … Read more
After successfully reading the SD card with the SDIO module on STM32F4 at the end of last month (see: STM32 SDIO Troubleshooting), I finally implemented a simple FAT32 file system, and then read the WAV files on the card to output signals to my CS4398 DAC to play music. Despite being quite rudimentary, I have … Read more
As mobile phone enthusiasts, we often encounter slow internet speeds. “Trying to reconnect” makes a comeback seem like a luxury. “Buffering” leaves our brewing emotions nowhere to go. So, the question arises: Does wind really affect Wi-Fi signal? 1 Q Why do the changes in tension of a broken rope and a broken spring differ? … Read more
What Is Impedance? Isn’t It The Same As Resistance? Regarding impedance (Impedance), I have found that many newcomers to this concept often confuse it with resistance (Resistance). This confusion may arise because both terms contain the character for “resistance” in Chinese, and both units are expressed in Ω. Additionally, impedance and resistance are related to … Read more