Check out this video for how to install a mailbox ...

Abstract: An intensity-modulated active intracavity rotation angle sensor was demonstrated based on a simple balloon-type fiber. The sensor leverages macrobending-induced loss, modulated by torsional ...

Abstract: In this letter, a vision-based high-resolution pressure array sensor with sensitivity enhanced by using visual light ring was proposed. The sensor consists of a transparent flexible layer ...

The Mailbox Guard is a device that detects when a new letter or package has been delivered to your mailbox using a PIR sensor and door reed switch. It can send a signal to your LoRa gateway, then the ...