TPA3116 Desktop Amplifier (Bluetooth Version) V1

## Introduction:
Based on the TPA3116 desktop amplifier of Hacklabs, some modifications were made.


## 1. Modification content
- A fast recovery fuse was added to the power input
- The power supply system chip was replaced with LM2596S-12/TR, which is larger in size and allows a maximum current of 3A
- A new Bluetooth module (JDY-62A) was added to switch the playback source.
- An audio frequency switching function was added, exposing the AM0, AM1, and AM2 pins to use jumpers to switch high and low levels.
- The power switching function was added, and the 12V power supply stabilized by the LM2596S-12/TR with a small power supply can be used as the amplification source, or an external power supply can be used directly as the amplification source, and the power can be dynamically changed with the external voltage.
- All the original coupling and filter capacitors were replaced with Weimar capacitors. They are 4 0.68uF Weimar capacitors and 6 1uF Weimar capacitors.

## 2. Usage
test The power supply is powered by a switching power supply of 12V, and the amplification power supply is the 12V power supply provided by LM2596S-12/TR. AM0, 1, 3 are all set to level 0. There is no current sound when Bluetooth is not connected, and the sound quality of music played when Bluetooth is connected is clear and there is no current sound.

## 3. Special Purchasing Instructions
##### Pay special attention to the withstand voltage value when purchasing capacitors or inductors.
**Toggle switch:** [3PIN](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=596680222969&_u=61v3prvpa06c) [6PIN](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=607286825881&_u=61v3prvp1c81)

**Weima capacitor**: [1uF](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=40693642954&_u=61v3prvp7bbc) [0.68uF](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=44317820173&_u=61v3prvp076e)

**Two C2, C33 100uF tantalum capacitors** [100uF](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=536960542946&_u=61v3prvpd0de)

**Inductor:** [68uH(680)](https://item.taobao.com/item.htm?spm= a1z09.2.0.0.51f12e8dme0LQv&id=618214669025&_u=61v3prvp8cdc) [10uH(100)](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=522553835885&_u=61v3prvpbd9e) [0603 SMD high frequency inductor 100nH ](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=575764691010&_u=61v3prvp7eb6)

**Diodes D1, D2:** [SS54](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=522555071084&_u=61v3prvpb06a)

**Bluetooth module:** [JDY-62A](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=628253237715&_u=61v3prvp6528)

**Fuse selection 32V/4A**

**Potentiometer selection B20K/dual 6-pin**

**Headphone jack:** [3F07 ](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=538157088947&_u=61v3prvp17ce)

**50V1000uF point solution capacitor:** [1000uF](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=574554041657&_u=61v3prvp4e51)

[NE5532N](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=693959341489&_u=61v3prvp0b9f) [LM2596S-12/TR](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.51f12e8dme0LQv&id=693633796579&_u=61v3prvp09f6)


## 4. Finished product preview

![微信图片_20230106093136.jpg] ![微信图片_20230106093145.jpg] ![微信图片_20230106093149.jpg] #### The appearance of the shell installed
Shell tb link: [88*38 Specifications 130mm](https://item.taobao.com/item.htm?spm=a1z09.2.0.0.7c5d2e8dehmMZw&id=579504968901&_u=b1v3prvp285f)

The shell file is in the project panel Panel file
![IMG_1473 (1).jpg]
The shell file is in the project panel Pane2 file
![微信图片_20230423161546.jpg] ![微信图片_20230423161540.jpg]