This letter introduces a dual-type proximity sensor and a control strategy for a robot manipulator to realize safe human-robot interactions (HRI) by using the sensor. Safety is an essential condition ...

This article develops a new sensor that can detect projectiles in all-weather with high sensitivity and a large field of view. Two high-power line lasers are used to design an active photoelectric ...

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 ...