From January 20, 2021, to March 31, 2021, The sixth “Thanksgiving Month” returns with charging and lottery. 10 technical videos, 11 days of real-time lottery, three live broadcasts on March 2, 5, and 10, with three prize pools full of materials, interesting surprises, and simultaneous lotteries. Invite friends to participate together, and both the invited … Read more
RS-485 is a commonly used differential communication bus, capable of long-distance transmission with good interference resistance. However, how can we monitor the communication process for several hours or even days in the face of occasional faults during communication? 1. Testing Requirements Low-cost long-term monitoring of RS-485 bus communication. 2. Testing Challenges The RS-485 is … Read more
Overview A logic analyzer is an instrument used to analyze the logical relationships in digital systems. It belongs to the category of data domain testing instruments and is a type of bus analyzer, meaning it is based on the concept of buses (multiple lines) and can observe and test data flows across multiple data lines. … Read more
Testing and Measurement Tools 1. Handheld Devices Handheld devices are specially developed for testing PROFIBUS cables with RS 485 interfaces. For example, Siemens BT200 (recommended) and ComSoft Nettest II. Handheld devices can test the installation, as well as check the PROFIBUS cables and stations. To use the handheld device, it must be connected to the … Read more
Raspberry Pi Physics: Measuring the Speed of Light Title: Raspberry Pi Physics: Measuring the Speed of LightThis is a paper published by Tom Ekkens in the 2024 issue of The Physics Teacher. This article measures the speed of light using relatively inexpensive equipment, as using a Fizeau-Foucault apparatus and a beam splitter can be quite … Read more
With the rapid advancement of technology, the once bulky and heavy oscilloscope can now easily fit in your pocket, revealing the mysteries of the electronic world anytime, anywhere. This is not only a symbol of technological innovation but also the ultimate interpretation of portability and practicality. Recently, I discovered a striking small oscilloscope project whose … Read more
In embedded development, an oscilloscope is an essential debugging tool that allows developers to visually observe the signal waveforms in circuits, helping them quickly locate issues. However, traditional oscilloscopes are expensive and bulky, making them unsuitable for portable development. The ESP32, as a powerful Wi-Fi microcontroller, has abundant GPIO resources and strong processing capability, making … Read more
【Click the blue text above to follow DF Maker Community and become a tech enthusiast】 The community public account records shareable maker-related content every week, released every Friday～ Content is open source; contributions or recommendations are welcome. Submission email: <span>[email protected]</span> Images & Videos Build a 500KHz Oscilloscope with STM32 This project introduces how to use … Read more
Basic Requirements: Use the built-in ADC of the Arduino Uno to measure voltage input and output it to the serial port. Use the “Serial Plotter” on the PC side to view the corresponding waveform. Advanced Requirements (Software): Understand the basic functions and working principles of an oscilloscope. Use timer interrupts for sampling to ensure a … Read more
When the LCD screen displays abnormally, in the past, we would deduce the parameters through the phenomenon, which was time-consuming and labor-intensive. With the long-storage oscilloscope, debugging the LCD controller is no longer a headache… When the LCD screen displays abnormally, in the past, we would deduce the parameters through the phenomenon, which was … Read more