ultrasonic tones

1. HC-SR501 Human Body infrared sensor module test // Infrared sensing // Signal to port 7 Int Ledpin = 7 ; VoidSetup (){Pinmode (ledpin, input );Serial. Begin (9600);//Open the serial port and set the baud rate to 9600 bps.} VoidLoop (){IntIn= Digitalread (ledpin );Serial. println (In);//When someone is there, the output is high. 1 nobody is 0.Delay (2000); } I bought a module in this way: if it is placed on a car, it can sense whether there are people around it. If

different colors of the collage, or the same color of the collage. For example, we can see that the background of the scene can be a picture of space, or a gradient to create a sense of space as a background. More types of gradients, there is a hue of the gradient, there are different hue of the gradient, while the gradient is a directional feature, so for the obvious direction of the pattern background is also a gradient. Material class backgroun

brightness, contrast, and other settings of a photo The adjustments you make in IBooks Author do not affect the original photo, select the photo. 1. Click the Adjust image button in the format bar 。 If the formatting bar is not visible, choose View > Show Formatting Bar. 2, use control to make certain adjustments. Brightness: Changes the number of white tones in the photo. Drag to the right to add white to make the photo brighter. Contr

Author:tangsenDate:2015-12-13First, Introduction 1.1 Cantonese IntroductionCantonese is a Chinese-Tibetan language family of tones, commonly known as vernacular, English name Cantonese or Yue,It is very popular, mainly in Guangdong province, southeast Guangxi, Hong Kong and Macao and overseas Chinese community,It is very interesting, humorous humor, some vague of the sense of joy, but also shows the Guangdong region's partners humor friendly;It is ver

Millet 5s and Oppo R9 which good millet 5s and oppo R9 difference contrast First of all, briefly introduce the Millet 5s and Oppo R9 Millet 5s is the September 27, 2016 millet autumn new product launch of a flagship mobile phone, the main hole-free ultrasonic fingerprint identification, ultra-sensitive camera, Gaotong 821 high-end configuration, in addition to the high version also equipped with 3D touch-sensitive screen function,

arrival direction (DOA ). Among them, there are many studies on RSS and RF plus ultrasonic ranging. The propagation attenuation of RF signals is related to many parameters, such as the initial transmit power, the height of the antenna from the ground, the reflection, and the carrier frequency. If no verification is performed, the error may exceed 50%. The ultrasonic frequency of RF and

Pinypinyin. Java pinyin format class Pinyinhelper. Java Chinese character to PinYin class Pinyinresource. Java resource file loading class This article only introduces the conversion of Chinese characters to PinYin pinyinhelper, and the simplified and traditional conversion of chinesehelper is not described. The public interfaces of pinyinhelper are as follows: /*** Convert a single Chinese character to PinYin in the corresponding format * @ Param C: The Chinese character to be converted to Pi

the process color mode, so you can use a variety of palette tools, through the process color to get the color we need. This is why we need a lot of understanding of the principle of color mixing. Photoshop process Color Sample: We use Photoshop's optional Color tool as an example to make color-blending adjustments for photo colors. In the adjustment we need to determine the color according to the color adjustment area, in this picture, we can see the sky and the water is generally blue. Wh

In the layer palette, in the mode Drop-down list, there are several modes for compositing. Understanding the role of these models plays an important role in the synthesis of images. The following is a detailed description: Normal mode : This is the basic pattern of drawing and compositing , as well as the standard mode of a layer. When a tonal and selected image area is synthesized into the background, The normal pattern replaces the pixels below with the pixels added to the image, which is a d

With the increasing number of cars and the increasing shortage of parking spaces, parking becomes a headache for many car owners. At this time, the reversing radar becomes your good assistant. Now, the reversing radar is no longer unique to high-end vehicles. You can select a reversing radar for your car. Reversing radar, also known as parking assistance system or reversing computer warning system. Generally, a reversing radar consists of an ultrasonic