Modern smartphones are packed with a wide range of sensors, and their magnetometer can successfully identify certain kinds of ...

This circuit was designed to detect when a call is incoming in a cellular phone (even when the calling tone of the device is switched-off) by means of a flashing LED. The device must be placed a few ...

Google is rolling out a new feature for Android called “on-body detection,” perhaps already glommed to a phone near you. On-body detection is apparently designed as a measure to prevent would-be ...