Piezoelectric ultrasonic transducers play a critical role in modern sensing and actuation by converting electrical signals into high‐frequency mechanical vibrations and vice versa. Recent ...

Conceptually the circuit there is simple, consisting of the ultrasonic receiver, followed by a transistor amplifier for the modulated wave, then a diode for demodulation, another transistor ...

Qualcomm’s second-generation ultrasonic fingerprint reader — the 3D Sonic Max —is 17 times larger than the original, in an attempt to solve the first-gen model’s issues.

To use this circuit adjust 4k7Ω Resistor at resonance frequency of the piezo transducer for maximum amplitude of the repeller ultrasonic sound. At 11 KHz to 22kHz this can reach a value of 10Vpp and ...

Using ultrasonic technology, this 3D printer offers a gentle, non-contact method to manipulate material particles and sensitive components into full electronic circuits. Ultrasonic research ...

This power-amplifier pair drives piezo and ultrasonic transducers for industrial and medical applications. The MP111 controls a pulsed 50-A output current on a 100-V single-ended supply and 500 ...

This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. The ultrasonic frequency must be set with a ...