黄土马家

# Sixth Lichuang Electric Competition#Audio amplifier+Bluetooth

Overview

1. Introduction to project functions

Bluetooth + power amplifier board, using PD induction or DC port power supply 12V-24V

Two audio input options, automatically switching audio sources (Bluetooth has the highest priority)

TPA3116, Jerry Bluetooth module

2. Project attributes

First public release, not entirely original

3. Open source agreement

GPL 3.0

4. Hardware part

Use CH224K induction chip, when R2 is not connected. Decoy 20V voltage.

Jerry Bluetooth 5.0 module, when Bluetooth is connected to the device, the LINK pin outputs high level

CH442E, video and audio signal switching module.

The purpose of selecting the signal source is achieved by configuring the IN pin level (LINK pin of the Bluetooth chip)

TPA3116 module + preamplifier, refer to the circuits of many open source experts and the official development board circuits

5. Software part

6. BOM list

Refer to the BOM table below

7. Contest LOGO verification

None

8. Demonstrate your project and record it as a video for uploading

Design Files

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Update:2025-06-14 00:44:05

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