Your Arduino not only makes cute sounds with a buzzer, but it is fully capable of producing driving signals for ultrasonic transducers. In this video from LearnPiezo, I show how an Arduino can output a 1MHz square wave with no extra circuitry. I also show the practical usage of a 40kHz signal.

Here are the supplies:
Arduino nano
Picoscope 2405A
Oscilloscope probe (1x), breadboard, and jumper wires

To sign up for my ultrasonic transducer webinars, follow the link: https://www.ultrasonicadvisors.com/mo...

Schedule a 30 min Q&A or a free consulting call:
https://calendly.com/ultrasonicadviso...

My piezoelectric/ultrasonic transducer consulting website:
https://www.ultrasonicadvisors.com/