Here are the datasheets of piezoelectric ultrasonic sensors and of integrated circuits used for the realization of our circuits:

Datasheet download
| Component | Datasheet |
|---|---|
| Piezoelectric ultrasonic sensors | MA40S4 with its Application Manual |
| Amplifiers | TL084 |
| Inverting buffer | HEF 4049BF |
| Inverting Schmitt trigger | HEF 40106BP |