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ESP32 Audio Transceiver Board (Part 1)

SD Card WAV File Player Demo

ESP32 Audio Transceiver Board (Part 1)
ESP32 Audio Transceiver Board (Part 1)
ESP32 controllers are well-like solutions used in thousands of IoT, smart home, and other remote control projects. The ESP32 has also a good I2S interface, which can be used to output and input digital audio signals. In combination with an I2S DAC, an I2S ADC, and an SD card, many kinds of audio projects are possible. In this project, we integrate all this, together with a nRF24 transceiver for transmitting and receiving (audio) data, on a solder-friendly PCB. In the first part of this article series, we present the block diagram, circuit, and demo software.
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Materials

Component list

Component List

002

 

Resistors

R1, R2, R3 = 100 Ω

 

Capacitors

C1, C5, C6 = 10 nF
C2 = 10 µF
C3, C4 = 1 µF

 

Semiconductors

IC1 = TLV76733DGNR (SOP65P490X110-9N)

 

Modules and Connectors

J1 = Barrel Jack 
J2 = TB010-508-02BE terminal block
J3 = Pinheader 1x22, 2.54 mm pitch
J4 = MSD-11-A (MSD11A) SD card socket
J5 = Qwiic Connector
J6 = Grove Connector
J7, J8, J9, J10 = Grove Connector

MOD1 = nRF24L01 + Vertical 2.54 mm (2x4) connector
MOD2 = Pmod I2S2 + Right Angle 2.54 mm (2x6) connector
MOD3 = ESP32-S3-DevKit-C + 2x pinheader 1x22, 2.54 mm pitch

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