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Bluetooth audio tx

Unosoluciones·De-RCA-a-BT

Bluetooth audio tx PCB layout, top view — open source Raspberry Pi board by Unosoluciones
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About the Bluetooth audio tx PCB

Bluetooth audio tx is an open source Raspberry Pi PCB design by Unosoluciones, published on GitHub. It is a 2-layer board measuring 85 × 55 mm, with 7 components from 7 distinct parts.

Its main chip is the RaspberryPi_Pico_2, from the Raspberry Pi family. Other key parts include the KCX_BT_EMITTER. By type, the board carries 2 ICs, 2 connectors and 1 capacitor.

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

From the project

Driver para conectar por bluetooth cualquier dispositivo con salida RCA

Diseño esquemático completo, trazado de PCB de 2 capas y firmware en MicroPython para un Transmisor de Audio Bluetooth de alta calidad controlado por el microcontrolador RP2350 (Raspberry Pi Pico 2).

El proyecto cuenta con entradas de audio analógicas duales (RCA Izquierdo y Derecho), interfaz gráfica LCD 1602A operada en bus paralelo de 4-bits, control de contraste por trimpot 3362P y topología de masa en estrella (Star Grounding) para eliminar cualquier ruido digital en la línea de audio.

Main components on the Bluetooth audio tx

RaspberryPi_Pico_2KCX_BT_EMITTER

Bluetooth audio tx bill of materials (BOM)

7 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RaspberryPi_Pico_2
U1
1
KCX_BT_EMITTER
U2
1
RCA_HORIZ_WHITE_L
J1
1
RCA_HORIZ_RED_R
J2
1
LCD1602A
DS1
1
10K
10k
RV1
1
100uF_16V
C1

Bluetooth audio tx design files

The KiCad project lives in the Unosoluciones/De-RCA-a-BT repository on GitHub; these links point at the commit this page was built from.

Bluetooth audio tx: common questions

What microcontroller does the Bluetooth audio tx use?

The Bluetooth audio tx is built around the RaspberryPi_Pico_2, from the Raspberry Pi family.

How big is the Bluetooth audio tx PCB?

The Bluetooth audio tx measures 85 × 55 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bluetooth audio tx?

7 components, from 7 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Bluetooth audio tx design files?

From the Unosoluciones/De-RCA-a-BT repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Bluetooth audio tx design in my own project?

The repository has no license, so all rights stay with Unosoluciones. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Bluetooth audio tx without the hardware?

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

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