Whether it is high or low, the relay will work. When it is high, the voltage difference between the 3rd and 4th pins of the optocoupler is 10V, and the relay is 24V. Shouldn't it be 0 when it is high?...
Hello everyone, I have a few questions to ask you. I am studying the Bluetooth device of embedded system recently. The CPU used is s3c2443, and the OS is WinCE Platform Builder 5.0. I want to build a ...
Now I have a large constant array const int testdata[1000]. In order to save memory, I want to put it in the code segment. How do I declare it? In the past, in the microcontroller, the bytes were simp...
The problem of HPS accessing the i/o port of FPGA through the HPS-to-FPGA bridge. It is not a lightweight bridge. Has anyone done it before? I have been working on it for two days, but it doesn't work...
Dear heroes, the clock of the crystal oscillator is main_clk. After dividing the clock, we get the AD clock AD_clk. However, in the actual circuit diagram, I connected AD_clk to the pin corresponding ...
I have a problem and hope that experts can give me some advice. If there is an irregular DC pulse wave (2.0v-28v 0-160ma), and I want to collect it into a battery with a floating voltage of DC10v, how...
0 Introduction
With the development of my country's economy, the number of motor vehicles continues to increase. The growth of existing roads and other hardware facilities can no longer meet t...[Details]
Remote keyless entry (RKE) systems have become popular with users, with more than 80% of new cars in North America and more than 70% in Europe equipped with RKE systems. In addition to the obvious ...[Details]
No matter which processor you are learning, the first thing you need to understand is the registers and working mode of the processor.
ARM has 37 registers, including 31 general registers and ...[Details]
A standard cell
is an electrochemical
cell
used as a voltage reference standard in many electrical standards laboratories
. If properly maintained, standard cells are very stable. The ...[Details]
With concerns about the growing energy crisis, motor efficiency has become an important and timely topic. This is because motors use 63% to 70% of the electricity produced in the United States and ...[Details]
Key Points
1. Now, in addition to high-end smartphones and tablets, users also expect to use touch screens in other applications, and they are gradually appearing in cars and instruments.
...[Details]
The principles to be followed are as follows:
(1) In terms of component layout, related components should be placed as close as possible. For example, clock generators, crystal oscillat...[Details]
Designing low power circuits while achieving acceptable performance is a difficult task. Doing so in
the RF
bands increases the challenge dramatically. Today, nearly everything has wireless...[Details]
0 Introduction
In the design and construction of communication systems,
communication power supply
is called the heart of the communication system. The power supply system will dire...[Details]
Abstract: Based on the analysis of the characteristics of the IRIG-B (DC) code type, a design method for IRIG-B (DC) time code decoding is proposed. This method consists of a small number of periph...[Details]
Traditional synthesis techniques are increasingly unable to meet the needs of today's very large and complex FPGA designs implemented in 90nm and below process nodes. The problem is that traditio...[Details]
As a type of iron battery, lithium iron phosphate battery (hereinafter referred to as lithium iron battery) has always been widely concerned by industry friends (some people say that lithium iron b...[Details]
Automotive electronics are in a noisy environment
,
so automotive electronics must have excellent electromagnetic compatibility (EMC) performance. The most important part of automotive elec...[Details]
1. Sensor
According to the national standard GB7665-87, a sensor is defined as a device that can sense the specified measured quantity and convert it into a usable output signal according to a...[Details]
1. Introduction
Due to the good programmability and superior performance of FPGA, the number of embedded systems using FPGA chips in LCD splicing screens is increasing rapidly, especially in t...[Details]
Analog electronics
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