A directional soundbar proof-of-concept using cheap 40kHz transducers.

This project can work with the code from gururise and uses the STM32-bluepill library of yet-another-average-joe

On the PDF you can find my notes about the price, working principle and things like layout of the transducers I took while planning/designing the project.

This system has a set of parametric-speaker arranged side-by-side with independent angle control for each one. This allows the system to be focused on more than one targets thus making a more usable. With each section being able to rotate independently it takes less space with the rotating-mechanism than a single speaker with a gimbal.

You can see the code I used in this gist I posted quite a while ago (Which is essentialy the same code from gururise but with a different pinout)

In the amp section of the block diagram you can use anything else to handle the switching. The KiCAD drawing has a single sided PCB design but I didn't had the time to check if it is working.

Video of the first test with the STM32 driver using an old parametric array I built:

Some photos I took during building it: