Abstract: This circuit will automatically turn off the speaker driver when it detects that there is no audio signal input to save the battery power of the mobile phone. The AutoShutdown â„¢ circuit shown in Figure 1 introduces the transient characteristics of a phone call.

The circuit is shown in the figure below. The measuring instrument consists of sound wave acquisition, voltage amplification, low-pass filtering, waveform transformation, voltage detection, and sound and light display circuits. This article refers to the address: http:// Component selection: H

What to eat kidney and nourishing yin and blood? Foreword: The body is not good, it is necessary to nourish the yin, to supplement the blood, but also to kidney, but do not want to eat a lot of medicine, what should I do? What to eat kidney and nourishing yin and blood? Here are 10 Chinese medicines

In the summer, some patients with osteoarthritis have been sinned because of the madness of air-conditioning fans. Recently, the reporter learned from some hospitals in Qingyuan City that since the summer, patients who came to the hospital for rehabilitation arthritis to see arthritis, acupuncture,

USA - Philips Lumileds ( http:// ) expanded its LUXEON (3) Rebel family of LEDs with nine new emitters designed specifically for illumination solutions such as recessed lighting, street lamps and retrofit bulbs. The new LEDs have been optimized for specific color temperature and color rendering co

For a long time, some unscrupulous organizations and individuals in the society assumed the name of the China Quality Certification Center (CQC) and solicited business from certified companies. These included notifications of suspension of CCC certificates, notices of write-off costs, noti

In home decoration, the most non-latex paints that come into contact with consumers are the ones. As long as it is painted on the wall, it can't live without it. Coatings are generally classified into water-based paints and oil-based paints. Latex paint is a type of water-based paint. It is main

[High-tech LED News] On June 28th, the Nanjing South Railway Station of the Nanjing South Railway Station of Beijing-Shanghai High-speed Railway was officially opened. At this point, the project of the South Extension Line of Shifu Lighting Nanjing Metro Line 1 was completed. It is reported that t

In the past two years, Intel's prestige in the area of ​​microprocessors, many people are looking forward to AMD can make a comeback, make this world more lively, so it is full of expectations for the new bulldozer (Bulldozer). Well, now the good news is coming. Accordin

Model NO.: LKDB50P Use: Indoor Distribution Pairs Number: 50 Pairs

The food in the cafeteria is so dry and difficult to swallow. It is not enough to go out to eat during the lunch break. The method of saving time and satisfying appetite is undoubtedly the self-contained lunch. Now many young people choose this method to solve the stomach problem. As a result, the c

The wind of price increase has been unstoppable from Apple's four bags to Apple's fourth generation. Yesterday, an insider of a large domestic PC manufacturer told this reporter that due to the substantial increase in the prices of raw materials such as memory, LCD panels and engin