In the post [url=https://bbs.eeworld.com.cn/forum.php?mod=redirect&goto=findpost&ptid=509140&pid=2108293][color=#0066cc]The role of the primary and secondary series resistors of the power transformer ...
If I say that a single-chip microcomputer is a computer, you may not agree. In fact, there is no essential difference between it and the computers we use. The only difference is between 5 steps and 10...
[backcolor=rgb(239, 245, 249)][size=14px]In the figure, the input is 24V, and the output is 10V and 40V respectively[/size][/backcolor] [backcolor=rgb(239, 245, 249)][size=14px]I want to know 3 questi...
I feel that microchip products are pretty good, but they are a bit expensive, and unlike ARM, you can buy one and use many kinds of chips, so you can only DIY...
[color=#333399]For security infrared monitoring CCD cameras,[/color][size=10.5pt]the turning on and brightness adjustment of infrared LED lights are very critical[/size][size=10.5pt]. In the past, mos...
10A is the current of the relay output. Due to various reasons, the relay must be installed on the PCB board. I have no experience in designing 10A before. Method 1: Open a window in the solder mask l...
Regarding the PHY construction of LWIP, the PHY chip used is LAN8720A, RMII mode. Regarding the hardware connection part, the Atomic board F407 is used, and the hardware connection is as follows: ...[Details]
I have always wanted to write some posts and blogs, but I just couldn't bear to do it as I just graduated. After some preparation, I decided to write down some of the things I learned in the past few...[Details]
Time flies. Since the beginning of 2018, news related to home appliance companies have repeatedly made headlines, and competition in the home appliance market continues to intensify. In order to be...[Details]
Recently, the "Smart Photovoltaic Industry Development Action Plan (2018-2020)" jointly issued by six departments has put this concept on the forefront. Photovoltaic smart solutions will become the ne...[Details]
This routine is also a classic routine on the development board. I modified the framework of the program to make it more suitable for future calls. The specific 4*4 keyboard scanning principle is rel...[Details]
As the brain of a mobile phone, the mobile phone processing chip is of great importance. Xiaomi, which started out as the MIUI company, has long been keenly aware of the gap between China and devel...[Details]
When Amazon quietly launched a product called Elastic Computing Cloud 12 years ago, the Internet industry in China, across the ocean, also ushered in an unprecedented development opportunity. Let's...[Details]
OSC_IN and OSC_OUT are external crystal pins by default. If you do not use an external crystal oscillator on the STM32, how to connect OSC_IN and OSC_OUT If you use the internal RC oscillator instead...[Details]
Here is the temperature added in the previous chapter The above figure is the temperature calculation formula: where Vsense is the ADC value collected from the temperature channel. The stm32f407 ...[Details]
The frequency calculation formula of the PWM wave generated by the output comparison mode of the timer is: 72M/((2*(arr+1))*(psc+1) ) For example, if you set: PWM_Init(1000-1,72-1); (PWM_Init(arr,psc...[Details]
Design a second and minute pulse generator for a single-chip microcomputer using the interrupt method. Assume that P1.0 generates a positive pulse of one machine cycle per second, and P1.1 generates ...[Details]
When programming with Elan MCU, please pay attention to the following points: 1. When the program is longer than 1K, page jump will occur. If an interrupt handler is enabled, after entering the inte...[Details]
PORT6 outputs the action control, and is externally connected to a circuit that drives 8 seven-segment displays . Write a program to display 1, 2, 3, 4, 5, 6, 7, 8 on the 8 seven-segment displays in ...[Details]
Samsung has officially released its mobile phone chips. Meizu's recently released Meizu S6 uses Samsung 's Exynos7872 chip. Foreign media reports indicate that Samsung is trying to use its industr...[Details]
The following is a software simulation PT2272 decoding program, which is simply posted here for your reference. Software decoding program (simulation PT2272) ; ;The crystal frequency is 11.0592MHz...[Details]