Bluetooth has always been a standard feature for smart devices, whether it be smartphones, laptops, or tablets. With the development of mobile internet, a large number of smart wearable devices have emerged, and the development of these applications requires not only mobile software support but also support from wireless sensing technology. Bluetooth remains the preferred … Read more
1. What is the 433m Wireless Module The 433MHz wireless transceiver module uses high-frequency RF technology, also known as the RF433 radio frequency small module. It consists of a single IC RF front end produced by All Digital Technology and an ATMEL AVR microcontroller, capable of high-speed data signal transmission. This miniature transceiver packages, error … Read more
1. Layout Specifications for the WiFi Module Circuit: The layout of the WiFi module should be kept away from the main control CPU and DDRAM and other high-speed digital devices to avoid mutual interference of high-frequency digital signals; The layout area of the WiFi module should include the bottom layer, avoiding the placement of other … Read more
With the trend of the Internet of Things, wireless communication modules have become an indispensable part of various electronic devices, and the communication quality of the modules largely depends on the rationality of the antenna design. This article introduces how to choose the appropriate antenna and maximize its performance. Reference for this article: http://www.21ic.com/app/rf/201803/755820.htm With … Read more
The communication distance of wireless modules is an important indicator, and how to maximize effective communication distance has always been a puzzling question for many. This article provides some explanations based on debugging experience and methods for selecting and using antennas, hoping to assist engineers in quickly debugging communication distances. 1. Types of Antennas With … Read more
I previously open-sourced the ESP32C3WROOM board, and today I’m open-sourcing the ESP32C3FH4. You can directly obtain the engineering files at the Lichuang Open Source Square. https://oshwhub.com/zctnb/works Actually, the chips are the same, but the ESP32C3WROOM is a module, while the ESP32C3FH4 is a chip that integrates 4MB of flash. Let me explain for those who … Read more
DIY a multi-band vertical portable antenna, click the video to learn more↓↓↓ 【Ham DIY】Spent less than 10 yuan to create a second-hand car intercom system, giving new life to abandoned intercoms 【Ham DIY】How to build a V dipole antenna to receive meteorological satellite cloud images 【Ham DIY】Refrigerator ground network and butter cookie box signal booster, … Read more
▲Click the blue text above to join the interesting and fun ham community “After using the HexBeam antenna for five years, I decided to take it down from the chimney and set it up on a 10-meter mast in my garden. The old mast still serves as an FM antenna, and the old antenna rotator … Read more
▲Click the blue text above to join the interesting and fun Ham Circle Arduino Mega2560 based Antenna Rotator Controller Arduino Mega2560 Antenna Rotator Controller 1) Collect the Antenna position using HMC5883 Digital Compass Collect antenna position information using HMC5883 application on mobile 2) Auto/Manual mode operation. A potentiometer is used to control the speed in … Read more