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# 🚗 Soundboard für den Carbage Run

## 🎯 Motivation

Beim **Carbage Run** – einer Rallye mit Schrottautos – haben viele Teilnehmer Fanfaren, Megafone oder lustige Sounds abgespielt.
Wir hatten zwar bereits ein Megafon mit Line-In und Bluetooth, aber:

> 🎛️ "Wenn ich hupen will, will ich auf einen Knopf hauen – nicht erst das Handy entsperren!"

Deshalb: ein eigenständiges Soundboard mit 25 Tasten, SD-Karte und Sofortreaktion.

---

## 📸 Vorschau

### Gehäuse (3D-gedruckt)

![Soundboard Gehäuse](docu/20240531_110053.jpg)
![Soundboard Gehäuse](docu/20240531_110109.jpg)
![Soundboard Gehäuse](docu/20230827_103529.jpg)
![Soundboard Gehäuse](docu/20230720_205834.jpg)
![Soundboard Gehäuse](docu/20230727_214800.jpg)
![Soundboard Gehäuse](docu/Screenshot_20230727-233512_Onshape.jpg)
![Soundboard Gehäuse](docu/Screenshot_20230727-233618_Onshape.jpg)

### Innenleben
![Soundboard Elektronik](docu/20230720_202601.jpg)
![Soundboard Elektronik](docu/20230720_220237.jpg)

### Tastenmatrix in Aktion
![Tastenmatrix](docu/Schaltung.jpg)

> Alle Bilder findest du im Ordner `docu/`

---

## ⚙️ Features

- 🎵 **25 Tasten** in 5×5 Matrix für direkte Soundauswahl
- 🔁 **Zweifachbelegung:** Shift-Modus (Taster gedrückt halten oder Bluetooth-Befehl → Track +25)
- 💾 **DFPlayer Mini** spielt MP3s direkt von SD-Karte
- 📡 **Bluetooth**-Steuerung per Smartphone-App oder Terminal
- 🧠 **ESP32** mit frei programmierbarer Logik
- 🧰 [**3D-gedrucktes Gehäuse**](https://cad.onshape.com/documents/51f835b686c64aa4e062ca5b/w/735ce97b22fc647d3e8dc544/e/93c6d67ebc2946beec692255?renderMode=0&uiState=6890fba874e54c0f2372ca89)

---

## 🧠 Schaltung

Erstellt in [Wokwi](https://wokwi.com) (Virtueller Schaltplan: `wokwi_project.json`)

### 🔘 Tastenanschlüsse

| Zeile (row) | ESP32 Pin |
|-------------|-----------|
| R1 | D19 |
| R2 | D18 |
| R3 | D5 |
| R4 | D17 |
| R5 | D16 |

| Spalte (col) | ESP32 Pin |
|--------------|-----------|
| C1 | D32 |
| C2 | D33 |
| C3 | D25 |
| C4 | D26 |
| C5 | D27 |

### 🎧 DFPlayer Mini Anschluss
Für die korrekte Verkabelung siehe
[DFPlayer Mini Dokumentation](https://www.elektronik-kompendium.de/sites/praxis/bauteil_dfplayer-mini.htm)

| DFPlayer Pin | ESP32 Pin |
|--------------|-----------|
| TX | GPIO22 |
| RX | GPIO23 |
| VCC | 5V |
| GND | GND |
|----| **Endstufe**|
| SPK1 | Left Audio |
| GND | GND Audio |
| SPK2 | Right Audio |


💾 SD-Karte:
MP3-Dateien im Format `0001.mp3` bis `0050.mp3` im MP3 Verzeichnis.


---

## 📂 Projektstruktur

```text
/
├── src/
│ ├── MP3/ # Arduino-Quellcode
│ └── main.cpp
├── printfiles/ # STL-Dateien für 3D-Druck
├── docu/ # Fotos, Schaltpläne, Screenshots
└── README.md
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