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Ultrasonic speaker

Etienne248·Bluetooth_Ultrasonic_Speaker·Kicad_Ultrasonic_Speaker/ultrasonic speaker/ultrasonic speaker.kicad_pcb

Ultrasonic speaker PCB layout, top view — open source ESP32 board by Etienne248

About the Ultrasonic speaker PCB

Ultrasonic speaker is an open source ESP32 PCB design by Etienne248, published on GitHub under the MIT license. It is a 2-layer board measuring 53.8 × 44.9 mm, with 6 components from 6 distinct parts.

Its main chip is the ESP32_DevKit_V1_DOIT, from the ESP32 family. Other key parts include the MIC4427. By type, the board carries 4 connectors and 2 ICs.

It belongs with the audio and iot & wireless designs in this gallery.

From the project

source code and hardware schematics for a Bluetooth phased array directional speaker built using ESP32

This repository contains the source code and hardware schematics for a Bluetooth phased array directional speaker built using ESP32 and ESP-IDF.

The project aims to create a speaker that can project a beam of sound in a specific direction using a phased array, allowing for a more targeted listening experience. The speaker is connected via Bluetooth to any compatible device, such as a smartphone or laptop.

Ultrasonic speaker, from the project README
From the project README

Main components on the Ultrasonic speaker

ESP32_DevKit_V1_DOITMIC4427

Ultrasonic speaker bill of materials (BOM)

6 components, 6 distinct parts.

QtyPartRefs
1
ESP32_DevKit_V1_DOIT
U1
1
MIC4427
U2
1
power supply
J1
1
to_boost_converter
J2
1
To_Array
J3
1
from_boost_converter
J4

Ultrasonic speaker design files

The KiCad project lives in the Etienne248/Bluetooth_Ultrasonic_Speaker repository on GitHub; these links point at the commit this page was built from.

Ultrasonic speaker: common questions

What microcontroller does the Ultrasonic speaker use?

The Ultrasonic speaker is built around the ESP32_DevKit_V1_DOIT, from the ESP32 family.

How big is the Ultrasonic speaker PCB?

The Ultrasonic speaker measures 53.8 × 44.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ultrasonic speaker?

6 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ultrasonic speaker design files?

From the Etienne248/Bluetooth_Ultrasonic_Speaker repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Ultrasonic speaker design in my own project?

Yes, under the terms of its MIT license, which Etienne248 chose for the repository.

Can I test firmware for the Ultrasonic speaker without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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