在这个项目中，将向您展示如何设置和编程您自己的考勤系统，该系统使用RC522 RFID reader。 整个项目中，将展示如何组合使用RFID RC522阅读器和16×2 LCD的电路。 首先展示将这些电路连接到Raspberry Pi的GPIO引脚所需的所有步骤。还将向您展示如何测试每个电路，使其 ...

用到了io和time，先设置IO的map方式，然后是引脚。接着死循环，交替的让18脚输出高低电平，中间是时间。 原理是很简单，通过快速的改变18脚的开关状态来工作，延迟时间用音调计算而来。 初始化的韩苏护创建一个check_var的成员变量，包含了一个bool的变量，未 ...

In addition to being a serviceable single board computer, the Raspberry Pi also has a header full of GPIO pins at your beck and call. [Tedbot] sent in a great tutorial on using these pins with Python, ...

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. In honor of Pi Day, Chaim Gartenberg and I cooked up a tiny little Raspberry Pi project for yesterday ...

The Raspberry Pi has been very popular among hobbyists and educators ever since its launch in 2011. The Raspberry Pi is a credit-card-sized single-board computer with a Broadcom BCM 2835 SoC, 256MB to ...

The Raspberry Pi is a great machine to learn the ins and outs of blinking pins, but for doing anything that requires blinking pins fast, you’re better off going with a BeagleBone. This has been the ...

Are you not quite sure what embedded development platform to use? Are you interested in learning Linux without the hassle of installing a distro on a target computing machine? If you answered yes to ...

There’s also a Python library (basically a set of commands you can use to control the robot) available to go alongside the HAT, which will let you write software to control the robot parts you’ve got ...