This paper presents a 591×438-DPI ultrasonic fingerprint sensor. The sensor is based on a piezoelectric micromachined ultrasonic transducer (PMUT) array that is bonded at wafer-level to complementary ...

A high brightness white LED night light, that is activated by an ultrasonic sensor, with battery backup based on a joule thief circuit. Full details of the build are given as I step through the design ...

It has become a common sight, a must-have feature on modern cars, a row of ultrasonic sensors embedded in the rear bumper. They are part of a parking sensor, an aid to drivers for whom depth ...

This simple to construct water fishing thermometer circuit is intended to be used in sports applications like for example a fishing contest. A sensor measures the water temperature at a certain depth.

(A) Physical drawing of the experimental platform. (B) Schematic diagram of the experimental platform connection. (C) Enlarged view of the skull fixation device. (D) Schematic diagram of the 10–20 ...