This smart door lock system provides an automated security solution using Arduino microcontroller technology. The system detects motion via PIR sensor, prompts for PIN authentication through a 4x4 ...

The TCL D2 Plus Fingerprint Smart Lock packs a lot for the money, but its stiff thumb-turn and sloppy deadbolt leaves me to ...

Level Lock Pro adds Matter, Thread, and built in door status detection to the smallest smart lock available, making it a top ...

A smart lock sounded complicated and risky, but installing one proved easier—and more life-changing—than I ever expected.

An hourglass tells you what it is in the name — a glass that you use to measure an hour of time passing by. [EDISON SCIENCE CORNER] has built a digital project that mimics such a thing, with little ...

[Hubert] sent us a tip about a friend’s project to rescue a laundromat from its failing electronics. We’re not entirely sure what went wrong with the old control center, but considering a replacement ...

According to the Staff Memo taped to the window of the Nurses' Station (above), you aren't going to find the keycode to its door simply written down somewhere in the hospital. This is technically ...

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.

Maintaining a truly smart home takes more than simply connecting to a digital assistant and a voice-activated speaker. Smart locks—or smart deadbolts, more accurately—streamline your daily routine and ...

The I2CKeyPad library implements the reading of a 4x4 keypad by means of a PCF8574. Smaller keypads, meaning less columns or rows (4x3) can be read with it too. Since 0.3.2 the library allows a 5x3, ...

Abstract: This work aims at building a working model for a complete intercom door lock system using Arduino and Raspberry Pi. The goal has been to unite the best of Raspberry Pi and Arduino in a ...