When a call ends, the caller or the called party hangs up, and the switch sends a busy signal to the other party. After a period of time, the busy signal needs to be cancelled. How can I use a single-...
Please help me find out what is wrong with the circuit. The speaker can play sound when it is directly connected to the voice IC, but there is no sound after it is connected to the power amplifier. Th...
Digital TV standard finally finalized after three years of delay Morning Post (Reporter Liu Yinghua) After more than three years of delay in the development of digital TV terrestrial transmission st...
1. There are signals in and out, and there may be a clk. When in changes from low level to high level, out should output high level immediately. No matter how in pin changes, out should not change. Ho...
Every time the program of the board is changed, the board must be powered off, then powered on again, and the program must be burned again before it can run. This is inconvenient. Are there any improv...
1. Introduction A greenhouse is also called a hothouse. Cultivating plants in a greenhouse with constant environmental parameters can provide a more suitable growth environment for plants. A greenho...[Details]
C&K, a leading manufacturer of high-reliability electromechanical switches, has expanded its toggle switch product line with a new illuminated switch. The ILT series is available with six colors of L...[Details]
What are the testing standards for automotive lights?
GB4599,GB4660,GB4758,GB21259,GB/T10485,QC/T1038,GMW14906,TSC3200G,TSC3000G
Optical performance test
Light dist...[Details]
There are some experiences I can share with you: (1) The output of the power supply circuit is connected to the board through a low-resistance, high-power resistor. In this way, the power supply ...[Details]
Wearable devices are no longer just hardware devices. The application of emerging technologies makes them more intelligent. With more powerful AI interaction functions, cloud data processing and comp...[Details]
As fossil fuel supplies decrease and climate change worsens, both the grid energy storage sector and the automotive industry are stepping up efforts to develop powerful and efficient energy storage t...[Details]
Although OLED is more suitable for Apple's mobile devices such as iPhone and iPad, the problem of screen burn-in has never been solved. In order to reduce the control of other screen manufacturers, i...[Details]
Is Kirin 985 just a beautiful misunderstanding? According to foreign media reports, reporters learned from Huawei's 2019 Developer Conference that the Mate 30 series of mobile phones are scheduled to...[Details]
Infineon Technologies has introduced two highly integrated, power-efficient DVB-H/T chip solutions: OmniVia TUS9090 and OmniTune TUA9000. OmniVia TUS9090 is a fully integrated system-on-chip (SoC) ...[Details]
The word "interconnection" is no longer a strange word since the new energy vehicle market began. For example, the two most common types of mobile phone interconnection are CarPlay and CarLIFE. These...[Details]
1 Introduction
Sinusoidal pulse width modulation (SPWM) technology has been widely used in the fields of AC speed regulation, DC power transmission, variable frequency power supply, etc. In o...[Details]
Abstract: Sensorless BLDC motor has a series of advantages such as simple DC motor structure, reliable operation, and easy maintenance. It has been widely used in various fields of industrial contr...[Details]
The development board used is from Puzhong Technology. A dot matrix display module is composed of 8x8 LEDs with a total of 64 LEDs connected in a common cathode or common anode manner. The negative...[Details]
KGI Securities predicts that with the gradual construction of 5G infrastructure and Apple's launch of the 5G version of the iPhone starting from 2020, the second wave of mobile phone replacement will...[Details]
1. Overview of the communication architecture industry chain
Early cars used a single point-to-point communication method and had little contact with each other. Each signal transmission requi...[Details]
RF/Wirelessly
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