/************************************************************************ * * Method to connect the upper four bits of LCD1602 display * * Description: 4-line data width, operate Lcd1602 * Display Hel...
Specifically, P1.4 sends a high level, allowing P1.2 and P1.7 to collect the voltage. In order to save power, this high level can only be maintained for 16 microseconds. I now find that if P1.4 is alw...
[i=s]This post was last edited by paulhyde on 2014-9-15 04:06[/i] Here is a list of components from previous years, which may help you analyze this year's competition questions!...
Due to the changes in system memory, the memory allocation needs to be modified in the BSP. The CPU used is MPC8270, and the memory controller corresponds to 12 banks CS0-CS11. Now the space correspon...
SAMR21 LED and Key There is a user key and a user LED light in the SAMR21 Xplained Pro development board. The hardware connection diagram is as follows: Figure 4-1: LED&KEY circuit diagram You can see...
The 485 bus of stm32 uses interrupts to send and receive. It can send and receive, but a byte (00 or CD) is inserted in the received byte. What's going on? Can anyone give me some advice? ?...
A single-chip microcomputer is also called a single-chip microcontroller. It is not a chip that completes a certain logical function, but a computer system integrated into one chip. In general, a c...[Details]
At present, the traffic congestion in cities is quite serious. According to relevant news reports: In China, the traffic congestion has expanded from megacities such as Beijing, Shanghai, and Guang...[Details]
Abstract: In order to generate a stable excitation signal, the design of a digital frequency synthesizer is implemented on FPGA using Verilog hardware language. The design includes accumulator, wav...[Details]
1 Introduction
With the acceleration of the pace of urban modernization, society has higher requirements for urban road lighting and urban lighting projects. The state has clearly required tha...[Details]
Product series: PB-B-RS232/485 interface (hereinafter sometimes referred to as "interface") is a product in the PROFIBUS bus bridge series.
The main purpose of the bridge series ...[Details]
This week, Microsoft held its 2012 Microsoft Worldwide Partner Conference (WPC) in Toronto, Canada. At the conference, Microsoft showed its new products and services to partners around the world. A...[Details]
This controller uses PIC16C54 single-chip microcomputer as the controller, and it is very easy to use: just connect a telephone line to the loudspeaker through the controller, and you can rem...[Details]
Fruit planting is an important part of China's agricultural development, and fruit tree pest control operations are becoming more and more important. At present, the overall level of pesticide applica...[Details]
1. Tips for charging UPS for the first time
After purchasing a new UPS, plug the UPS into the 220V mains power grid and charge it for at least 12 hours to ensure that the battery is fully char...[Details]
Infrared remote control is widely used in home appliances, but the remote controls produced are not compatible with each other. The universal remote controls commonly seen on the market can only co...[Details]
introduction
Belt drive is a common transmission device used in industrial production. Its commonly used speed detection device is a photoelectric encoder installed at the rotating end of th...[Details]
In the TV monitoring system, in order to complete the collection of information from various information points (video, audio, alarm signal) and the control of various front-end devices (PTZ, lens,...[Details]
In some motion control systems with simple control or low cost requirements, stepper motors are often used as actuators. The biggest advantage of stepper motors in such applications is that they ca...[Details]
1 Introduction
In order to cope with the energy crisis and slow down global warming, many countries have begun to pay attention to energy conservation and emission reduction and the de...[Details]
There are two main ways to measure temperature: one is the traditional contact measurement, and the other is
non-contact measurement represented by
infrared temperature measurement
. Tradit...[Details]