Edi Wang

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315MHz Remote Door Control by Windows 10 IoT

这几天我用树莓派实现了一个模仿车库遥控门的设备,分享给大家。(优酷视频 http://v.youku.com/v_show/id_XMTU3ODk1NDY2OA==.html )   一、遥控模块 首先介绍一下我用的遥控器和接收板,这种遥控模块在中国随处可以买到,基本都是长这样的。很多卷帘门、车库门都是用这种遥控模块的。做无线电实验购买的是非锁的版本,注意最好同时购买天线。天线用的是50欧姆单芯导线,其实就是个铜丝,注意购买时候要看好频率,中国大陆的无线电许可频率是315MHz,国外也有用443MHz的,我买的遥控器是315MHz。注意遥控器发射频率和接收频率要匹配就行。遥控接收端芯片是PT2272-M4,M4的意思是点动模式,即按住遥控器按钮输出高电平,松开停止输出。遥控板的ANT端...

Windows 10 IoT Raspberry Pi

Reed Controlled Light by Windows 10 IoT Core

Reed switch is an electronic component to connect / disconnect the switch by magnetic field. When it touchs magnetic field, the two iron sheets inside the tube will clip together, so the switch is connected.  The application of Reed Swith: Door light controller: When you open the door, turn the light on. When you close the door, turn off the ligh...

Windows 10 IoT Raspberry Pi

74HC595 4 Digits LED Tube with Windows 10

One of the common used LED Tube driver chip is 74HC595, by using the Chip, you can save GPIO ports. I bought a LED Tube with 595 chip, it only need 3 GPIO ports to display 4 digits. However there is no existing posts about how to drive the 74HC595 LED Tube from Windows 10. So I can only try for myse...

Windows 10 IoT Raspberry Pi

Azure Fire Alarm by Raspberry Pi and Windows 10 IoT Core

防火是日常生活中非常重要的意识,如果你是一只恩爱狗,出门在外,家里被FFF团点了,那真是太惨(hao)了。如果你恰好有Windows 10的设备,比如Lumia,Surface,能及时收到火警是至(mei)关(sha)重(luan)要(yong)的。今天就教大家如何用Microsoft Azure公有云+Windows 10 IoT Core在树莓派上实现一个远程火警系统。 阅读这篇文章,你需要的前置知识: Windows 10,UWP的基本开发能力 MVVM基础知识 ASP.NET MVC的基础知识 树莓派、GPIO及逻辑电路的基本知识(也就是大学里的计算机电路) Azure公有云的使用经验 ……当然,还要有对微软的信仰 一、设计原理 基本想法是,通过火焰传感器的输入信号...

Azure Windows 10 IoT Raspberry Pi

Azure Remote Controlled Light with Windows 10 IoT Core

For those who have watched the "Big Bang Theory", you would probably remember that those physicists build an Internet controlled lamp. The signal send from their laptop traveled around the world and come back to their house to light up the lamp. Now, with Windows 10 IoT Core and Microsoft Azure, we...

Azure Windows 10 IoT Raspberry Pi

Using stepper motor in Windows 10 IoT Core

如果你需要精确控制设备的转动角度,普通电机是做不到的,通常我们会选用步进马达。比如28BYJ-48这个型号的,很容易买到。 步进马达得配合驱动板使用,最常用的是ULN2003芯片的驱动板,就像下图。不过注意,你买到的驱动板长相可能不太一样,不过没关系,只要芯片上写的是ULN2003,就可以使用,它们的接口都是一样的。关于步进马达的原理,可以看这篇: https://en.wikipedia.org/wiki/Stepper_motor  拿到驱动板和步进马达后,将马达插入驱动板的白色插槽中,这个接口有防呆设计,所以不会插反。 关于Windows 10 IoT如何驱动步进马达,有一篇很好的英文材料: https://www.hackster.io/erickbp/stepper...

Windows 10 IoT Raspberry Pi

Sound Controlled Light by Windows 10 IoT Core

In many buildings, there are sound controlled light in use. When you clap your hands, the light turns on. Now, with Raspberry Pi 3 and Windows 10 IoT, we can make a sound controlled light ourselves. The sound sensor I use is FC-04. As other sensors, the first step is calibration. 1. Calibration for FC-04 Sound Sensor In quiet environment. Connec...

Windows 10 UWP IoT Raspberry Pi

Windows 10 IoT开发:HC-04超声波传感器测距(树莓派3)

HC-04是树莓派上用的比较广泛的超声波传感器,可以用来测量设备和物体之间的距离。可惜网上的资料很少有针对Windows 10的,几乎都是Python和C在Linux上的例子。 hackster.io上有一篇用HC-04做雷达的例子,但是设计的部件太多了,对单纯学习HC-04传感器的使用来说这个例子比较复杂。搜了一圈,英文资料最好的是这篇:http://www.guruumeditation.net/en/digital-io-with-windows-10-iot-raspberry-pi-2-and-the-ultrasonic-ranging-module-hc-sr04/ 国内中文资...

Windows 10 UWP IoT Raspberry Pi

Windows 10 IoT开发:土壤湿度传感器的使用(树莓派3)

前几天在淘宝上买了个长得这样的土壤湿度传感器: 结果搜了一圈,网上似乎还没有Windows 10的例子代码,又只能自己爆了。 这个传感器有4个阵脚,意思分别是: 针脚 含义 AO 模拟信号输出 DO  数字信号输出  GND  电源负极  VCC  电源正极  所以,我们把VCC接到树莓派的DC3.3v输出上,我用的是PIN 01,GND接在任何一个接地端口上,我用的是PIN 09,DO输出接任何一个空闲的GPIO端口,我用的是21。如果不清楚树莓派端口布局的朋友可以参考这张图: 连线完成就像是这样...

Windows 10 UWP IoT Raspberry Pi

GY-30 (BH1750FVI) Light Sensor with Windows 10 IoT

I purchased a GY-30 light sensor recently, this model is also known as "BH1550FVI". There seems no sample for this sensor on Windows 10 yet, so I tried to make one. The light sensor looks like this: My board is a Raspberry Pi 3, the GPIO layout is shown in this table: Because GY-30 is an I2C...

Windows 10 UWP IoT Raspberry Pi