Electronic and Arduino enthusiasts searching for an Arduino project to keep them busy this weekend may be interested in a new Arduino Mega fingerprint door lock.

A sensor that's too permissive, though, could allow kids to get into their parents' tablets. Or worse. A device's price didn't appear to be a strong indicator of its fingerprint sensor's robustness.

The Fingerprint Door Lock can be opened three ways: by using its fingerprint sensor, by entering owner-programmed numeric codes on a secure digital keypad, and by traditional metal key.

At the Mijia smart home new product launch conference held yesterday, Xiaomi also launched the MIJIA Smart Door Lock with a push-pull release. The device comes with a 1699 yuan($245) price tag and ...