A low-cost (~$100), do-it-yourself (DIY) ultrasonic water level sensor/datalogger has been designed, constructed, and tested for use in education, citizen/community science, and research settings. The ...

Redmi, a Xiaomi spin-off phone brand, says it has made in-display fingerprint sensors that work with LCD screens. Previously, only OLED screens supported them.

In fact, some time ago Oppo showcased a "wide zone" optical fingerprint sensor, which recognises an area up to 15 times bigger than current sensors. A similar technology was also used by Vivo in ...