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Students who bought the 51hei development board can burn it into your microcontroller to try out the effect.
Note: Check the time before burning. The default time is 1:05.
#include reg52.h
#define ...[Details]
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Citing music industry sources, Hits Double Daily reports that Apple is preparing to launch a new HiFi version of Apple Music in the "coming weeks," alongside the rumored third-generation AirPods. A...[Details]
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According to foreign media 91 Mobiles, Indian e-commerce portal Flipkart released a promotional poster for the realme 5 series. The poster shows that the realme 5 series will be released in India on ...[Details]
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Recently, Joseph Sawicki, executive vice president of Mentor IC EDA, visited China to attend the annual Mentor Forum 2019 Beijing Design Technology Forum. It has been 20 years since Sawicki first cam...[Details]
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LED lamp
Bead parameter introduction:
1.
Brightness
LEDs
have different brightness and prices.
Lamp cups: generally have a brightness of 60-70 lm;
...[Details]
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Modern communication technology is moving towards packetization of network core technology and wirelessization of narrowband access technology. In the field of wireless access, circuit-based tran...[Details]
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Choosing the best operating frequency for your power supply is a complex trade-off involving size, efficiency, and cost. Generally speaking, low-frequency designs tend to be the most efficient, but t...[Details]
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With the development of radio and television, the application of TV transmitter technology is becoming more and more extensive. In order to effectively ensure the quality of TV signals, the importa...[Details]
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Introduction
At present, the remote monitoring of oil pipelines, power equipment, oil wells, etc. mainly adopts the method of manual patrol. This method has the disadvantages of poor ...[Details]
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1 Introduction
CAD/EDA/PDM/ERP and other design and management system software solutions have been in China for more than 10 years. Why has the huge investment in introducing advanced f...[Details]
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In previous development, we had to use two USB host ports on the 2440, one for the camera and one for the wireless network card. However, the Friendly Arm mini2440 board only has one USB host port. We...[Details]
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Overview This article introduces a high-efficiency LED driver that can provide 12 V output voltage and 0.3 A output current in the input voltage range of 90 VAC to 265 VAC. The LED driver uses the...[Details]
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1. To understand the startup code: First, you must be familiar with the storage system and instruction system of ARM9 2. Approximate steps for startup: Enter reset exception--》Turn off watchdog, in...[Details]
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1 Introduction
Light-emitting diode (LED) is a semiconductor device that converts electrical energy into light. Compared with traditional incandescent lamps, LED has the advantages of...[Details]
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In the first half of 2020, due to the impact of the COVID-19 epidemic, delays and reductions in orders in the semiconductor industry chain were common; major semiconductor projects in various places ...[Details]
Analog electronics
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