Pull requests help you collaborate on code with other people. As pull requests are created, they’ll appear here in a searchable and filterable list. To get started, you should create a pull request.

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects, and the phone ...

[Sam Horne] adapted an old school landline phone to deliver clues to birthday party guests. When guests find a numerical clue, they type it into the keypad to hear the next clue, which involves ...

A standard telephone keypad, with four rows of three keys each. The top row consists of 1, 2, and 3, with keys continuing down in order until the last row, which is usually *, 0, and #. Such a keypad ...

在嵌入式开发的面试中，I2C总线是一个常见的考察内容。面试官通常会问一些关于I2C总线的基础知识、通信原理、常见问题以及调试方法等方面的问题。 以下是我整理的一些常见的I2C总线面试问题及回答。 I2C是一种串行通信协议，通常用于在MCU与外部设备（如 ...

CNET staff -- not advertisers, partners or business interests -- determine how we review products and services. If you buy through our links, we may earn a commission.

Forget keys! The best smart locks we've tested are secure, easy to install, and provide several convenient ways to control who can access your home and when. I'm PCMag's managing editor for consumer ...