After a day of work, the board broke and could not display letters. I didn't find it until noon. I changed to a new board and spent an afternoon tinkering with it. It can be used now. In fact, the ref...
The Museum of the Bible (MotB) is located in Washington, D.C., in a converted warehouse. As such, the building is a concrete and heavy steel structure that creates troublesome shadows and dead spots, ...
RF Basics
1. Power/Level (dBm): The output capacity of the amplifier, generally in units of W, MW, dBm
Note: dBm is the absolute power level expressed in decibels with 1mw as the reference value. Conv...
Task requirements:Number the 4X4 matrix keyboard. If one of the keys is closed, the corresponding key number will be displayed on the LED digital tube.The analysis shows thatthe 4X4 matrix keyboard on...
Wi-Fi 6/6E (802.11ax) has dramatically changed the landscape of network connectivity. This webinar will discuss the evolution of the Wi-Fi standard and how it is meeting the need for increased capacit...
I use a time delay to make the motor rotate, switching every 2ms. Figure 1 is my phase waveform, and Figure 2 is someone else's (the hardware is the same, the same board).My problem is that there is b...
The third China International Import Expo (CIIE) with the theme of "New Era, Shared Future" was held at the National Exhibition and Convention Center in Shanghai from November 5 to 10, 2020. During t...[Details]
Manufactured using the principle of electromagnetic induction, it has no contact points, no carbon brush wear, no sparks, etc. It has a low failure rate, high safety, and is maintenance-free. It...[Details]
At present, in the vehicle GPS navigation system, the main method is to directly use the GPS positioning data without differential and SA error to realize the positioning of the vehicle on the map. Co...[Details]
At 10 am on October 10, Lanjun New Energy Technology Co., Ltd. and Kaile Environmental Technology (Shanghai) Co., Ltd. formally signed a strategic cooperation agreement at Kaile Technology Industri...[Details]
While many WLAN managers focus on troubleshooting and avoiding security breaches, WLAN performance optimization is more focused on a to-do list. Not only is this approach ill-considered, but neglectin...[Details]
introduction
The electronic password lock system is mainly composed of an electronic lock body, an electronic key and other parts. An electronic key can store multiple sets of unlocking pa...[Details]
Oscilloscopes are the most familiar test instruments, but there is no way to do testing without a probe. Oscilloscope probes are indeed an indispensable member of the oscilloscope family. The perform...[Details]
1. keil4 establishes the engineering environment of AT89C52 1. Create a new project -- Atmel -- AT89C52 2. After selecting, a pop-up will appear asking whether to import the startup file. If it i...[Details]
AC-based continuity
tester
For first-line testing and repair work, it provides a simple go/no-go test method for multi-conductor cables to determine faults (Figure 1). Open circuits often o...[Details]
"Looking back at the Synopsys Wuhan Global R&D Center project, it was first initiated in 2010 when Synopsys President and Co-CEO Dr. Chih-Kuan Chen was invited by local leaders to visit Wuhan after a...[Details]
Researchers in the EU-funded 5G MiEdge (Millimeter-wave Edge) project have developed a millimetre-wave (mmW) wireless communication system that enables long-range communications and real-time streami...[Details]
Transmitter made of electron tube
This article introduces a transmitter assembled with 6Pl power amplifier tubes.
The circuit is shown in the figure below: B1, B2, G, R1, R2, C2...[Details]
The circuit for obtaining steep-front high-voltage narrow pulses using a MARX generator is relatively complex, and there are many design and process difficulties in steepening the front. It is easy...[Details]
Introduction As data processing, mass storage, and communications systems have grown, the size and complexity of subsystems used to communicate information such as temperature, fan speed, system...[Details]
introduction
LED digital tubes are commonly used display devices in single-chip microcomputer systems. Each field of LED digital tubes larger than 1 inch is composed of multiple light-emit...[Details]
Microcontroller MCU
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