# Amazon Shopping Lists for DIY Ghost Hunting Equipment

All parts readily available on Amazon. Prices approximate as of 2025.

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## 🛒 Complete Starter Kit ($80-120)

**For building multiple devices, get everything:**

### Core Microcontroller (Choose ESP32 for versatility)
- **ESP32 DevKit V1 (3-pack)** - $18-25
  - Search: "ESP32 DevKit WROOM-32"
  - Includes USB cable
  - Multiple boards for different projects

### Displays (Choose based on project)

**For Touchscreen Interfaces:**
- **2.8" ILI9341 TFT LCD Touchscreen (240x320)** - $12-18
  - Search: "2.8 inch ILI9341 SPI TFT LCD Touch Screen ESP32"
  - Resistive touch (works with stylus or finger)
  - SPI interface
  - Includes SD card slot
  - **BEST FOR:** Ovilus, Spirit Box, REM Pod with UI

- **3.5" ILI9486 TFT LCD Touchscreen (320x480)** - $15-22
  - Search: "3.5 inch TFT LCD Touch Screen 480x320 ESP32"
  - Larger display, easier to read
  - Better for menu navigation
  - **BEST FOR:** Multi-function devices

**For Non-Touch Displays:**
- **0.96" OLED I2C Display (128x64) - 5-pack** - $12-15
  - Search: "0.96 OLED I2C Display Arduino"
  - Low power, high contrast
  - Great for simple readouts
  - **BEST FOR:** EMF meters, simple spirit boxes

**For Button Navigation:**
- **5-Way Navigation Joystick Module (5-pack)** - $6-10
  - Search: "5-way joystick button module Arduino"
  - Up/Down/Left/Right/Press
  - Easy menu navigation

- **Rotary Encoder with Push Button (5-pack)** - $8-12
  - Search: "KY-040 Rotary Encoder Module"
  - Smooth menu scrolling
  - Click to select

- **Tactile Push Buttons Assortment (120pcs)** - $7-10
  - Search: "tactile push button switch kit"
  - 12x12mm standard size
  - Various heights

### Sensors (Essential for Ghost Hunting)
- **BME280 Temperature/Humidity/Pressure Sensor (3-pack)** - $10-15
  - Search: "BME280 I2C sensor module"
  - Ovilus environmental detection

- **Hall Effect Magnetic Sensor Module (10-pack)** - $6-9
  - Search: "Hall effect sensor module Arduino 3144"
  - EMF/magnetic field detection

- **PIR Motion Sensor HC-SR501 (5-pack)** - $8-12
  - Search: "HC-SR501 PIR motion sensor"
  - REM Pod, BooBuddy

- **Vibration Sensor SW-420 (10-pack)** - $6-8
  - Search: "SW-420 vibration sensor module"
  - Detects movement/vibration

### Audio Components
- **DFPlayer Mini MP3 Module (3-pack)** - $10-14
  - Search: "DFPlayer Mini MP3 module"
  - Includes SD card slot
  - For Ovilus voice, BooBuddy questions

- **Small Speakers 8Ω 0.5W (10-pack)** - $8-12
  - Search: "8 ohm speaker 0.5W arduino"
  - Audio output

- **PAM8403 Amplifier Module (5-pack)** - $6-9
  - Search: "PAM8403 audio amplifier module"
  - Boost speaker volume

- **Active Buzzer Module (10-pack)** - $5-7
  - Search: "active buzzer module Arduino"
  - Alert sounds

### Radio Modules (for Spirit Box)
- **TEA5767 FM Radio Module (3-pack)** - $10-15
  - Search: "TEA5767 FM radio module stereo"
  - I2C control, easy to program

- **RDA5807M FM Radio Module (3-pack)** - $9-12
  - Search: "RDA5807M radio module"
  - Alternative to TEA5767

### Power Components
- **18650 Lithium Batteries (4-pack with charger)** - $18-25
  - Search: "18650 battery 3000mAh with charger"
  - Rechargeable, long runtime

- **18650 Battery Holder (10-pack)** - $8-12
  - Search: "18650 battery holder with switch"
  - Single cell holders

- **TP4056 Lithium Charging Module (10-pack)** - $7-10
  - Search: "TP4056 charging module with protection"
  - USB-C versions available

- **MT3608 Boost Converter Module (10-pack)** - $6-9
  - Search: "MT3608 DC-DC boost converter"
  - Step up voltage if needed

### LEDs and Indicators
- **WS2812B LED Strip (1m, 60 LEDs)** - $8-12
  - Search: "WS2812B LED strip 5V"
  - Addressable RGB for REM Pod visual alerts

- **LED Assortment Kit (500pcs)** - $10-15
  - Search: "LED assortment kit 3mm 5mm"
  - Various colors for indicators

- **LED Ring 12-LED WS2812B (5-pack)** - $10-14
  - Search: "WS2812B LED ring 12"
  - Perfect for REM Pod

### General Electronics
- **Breadboard and Jumper Wire Kit** - $12-18
  - Search: "breadboard jumper wire kit arduino"
  - For prototyping

- **Resistor Kit (1000pcs)** - $10-14
  - Search: "resistor assortment kit 1/4W"
  - Various values

- **Capacitor Kit (500pcs)** - $12-16
  - Search: "ceramic capacitor assortment kit"
  - For filtering and timing

- **Transistor Assortment (200pcs)** - $12-15
  - Search: "transistor assortment kit NPN PNP"
  - For EMF meter cascade circuits

### Tools (if you don't have)
- **Soldering Iron Kit** - $25-35
  - Search: "soldering iron kit temperature control"
  - Essential for permanent builds

- **Wire Stripper/Cutter** - $8-12
  - Search: "automatic wire stripper"

- **Multimeter** - $15-25
  - Search: "digital multimeter auto-ranging"
  - Troubleshooting essential

### Enclosures and Cases
- **Plastic Project Box Assortment** - $15-22
  - Search: "plastic project box enclosure kit"
  - Various sizes for housing builds

- **3D Printer Filament PLA (if you have printer)** - $18-25/kg
  - Search: "PLA filament 1.75mm"
  - For custom enclosures

---

## 📱 Device-Specific Shopping Lists

### 1️⃣ EMF Meter (K2 Style) - $15-25

**Essential:**
- Arduino Nano or ESP32 - $6-10
- 0.96" OLED Display - $3 (from 5-pack)
- 5x LEDs (green, yellow, red) - $1 (from kit)
- Hall Effect Sensor or DIY coil antenna - $1
- Resistors - $2 (from kit)
- Transistors (if cascade design) - $2 (from kit)
- 9V battery and holder - $4
- Plastic enclosure - $3

**Optional:**
- Buzzer for audio alerts - $1

**Programming:** C++ in Arduino IDE
**Build Time:** 2-4 hours
**Difficulty:** ★☆☆☆☆

---

### 2️⃣ Spirit Box with Touchscreen - $40-55

**Essential:**
- ESP32 DevKit - $8
- TEA5767 or RDA5807M FM Radio Module - $4
- **2.8" TFT LCD Touchscreen** - $15
- PAM8403 Amplifier - $2
- Small Speaker - $1
- 18650 Battery + Holder - $6
- TP4056 Charging Module - $1
- Plastic enclosure - $4

**Optional:**
- Rotary encoder for frequency control - $2
- SD card for logging - $5

**Programming:** C++ in Arduino IDE (library: TFT_eSPI, Radio.h)
**Build Time:** 4-6 hours
**Difficulty:** ★★★☆☆

**Touchscreen Features:**
- Frequency range selection (AM/FM/SW)
- Sweep speed adjustment
- Forward/Reverse toggle
- Volume control
- Session recording

---

### 3️⃣ Ovilus Clone with Touchscreen - $50-70

**Essential:**
- ESP32 DevKit (needs lots of memory) - $8
- BME280 Sensor (Temp/Humidity/Pressure) - $4
- Hall Effect Sensor (Magnetic) - $1
- **3.5" TFT LCD Touchscreen** - $18
- DFPlayer Mini MP3 Module - $4
- MicroSD Card (4GB) - $5
- Small Speaker - $1
- PAM8403 Amplifier - $2
- 18650 Battery + Holder - $6
- TP4056 Charging Module - $1
- Plastic enclosure - $5

**Optional:**
- Additional environmental sensors - $10

**Programming:** C++ in Arduino IDE
**Build Time:** 8-12 hours
**Difficulty:** ★★★★☆

**Touchscreen Menu:**
- Mode selection (Dictionary/Phonetic/Energy)
- Sensor calibration
- Word history log
- Sensitivity adjustment
- Database selection

**Word Database:**
- Store 2048 words in flash memory
- Map sensor values to word indices
- Text-to-speech via DFPlayer or display only

---

### 4️⃣ REM Pod with LED Ring - $30-45

**Essential:**
- ESP32 or Arduino Nano - $8
- BME280 Temperature Sensor - $4
- Hall Effect or EMF Coil - $1
- **12-LED WS2812B Ring** - $3
- Active Buzzer - $1
- 0.96" OLED Display (optional) - $3
- 18650 Battery + Holder - $6
- TP4056 Charging Module - $1
- Plastic enclosure - $4

**Optional:**
- Buttons for sensitivity control - $1
- Vibration sensor - $1

**Programming:** C++ in Arduino IDE (library: Adafruit_NeoPixel, Adafruit_BME280)
**Build Time:** 3-5 hours
**Difficulty:** ★★☆☆☆

**Features:**
- LED color changes based on EMF strength
- Temperature drop alerts
- Audible proximity alarm
- Adjustable sensitivity

---

### 5️⃣ EVP Recorder - $35-50

**Essential:**
- ESP32 (needs I2S for audio) - $8
- INMP441 I2S Microphone Module - $6
- MicroSD Card Module - $3
- MicroSD Card (16GB) - $8
- 0.96" OLED Display - $3
- Push Buttons (Record/Stop) - $1
- 18650 Battery + Holder - $6
- Plastic enclosure - $4

**Optional:**
- 2.8" Touchscreen for file browser - $15

**Programming:** C++ in Arduino IDE (library: I2S, SD)
**Build Time:** 4-6 hours
**Difficulty:** ★★★☆☆

**Features:**
- 16-bit/44.1kHz audio recording
- WAV file format
- Timestamped files
- Real-time audio level meter
- Playback functionality

---

### 6️⃣ BooBuddy Clone with Touchscreen - $45-60

**Essential:**
- ESP32 DevKit - $8
- BME280 Sensor - $4
- PIR Motion Sensor - $2
- Vibration Sensor - $1
- Hall Effect Sensor - $1
- **2.8" TFT LCD Touchscreen** - $15
- DFPlayer Mini MP3 Module - $4
- Small Speaker - $1
- PAM8403 Amplifier - $2
- 18650 Battery + Holder - $6
- TP4056 Charging Module - $1
- Plastic enclosure - $5

**Programming:** C++ in Arduino IDE
**Build Time:** 6-8 hours
**Difficulty:** ★★★☆☆

**Touchscreen Features:**
- Question bank selection
- Auto-question interval timing
- Sensor sensitivity sliders
- Event log viewer
- Custom question upload

**Pre-record questions on SD card:**
- "Is anyone here?"
- "Can you make a sound?"
- "What is your name?"
- etc.

---

### 7️⃣ Multi-Function Ghost Hunter - $80-110

**All-in-one device with touchscreen interface!**

**Essential:**
- ESP32 DevKit - $8
- **3.5" TFT LCD Touchscreen (480x320)** - $18
- BME280 Sensor - $4
- Hall Effect Sensor - $1
- PIR Motion Sensor - $2
- Vibration Sensor - $1
- TEA5767 FM Radio Module - $4
- DFPlayer Mini MP3 Module - $4
- INMP441 I2S Microphone - $6
- MicroSD Card Module - $3
- MicroSD Card 32GB - $10
- 12-LED WS2812B Ring - $3
- PAM8403 Amplifier - $2
- Small Speaker - $1
- 18650 Battery (2x) + Holder - $12
- TP4056 Charging Module - $1
- Large plastic enclosure - $8

**Programming:** C++ in Arduino IDE
**Build Time:** 12-20 hours
**Difficulty:** ★★★★★

**Touchscreen Main Menu:**
```
┌─────────────────────────┐
│  👻 Ghost Hunter Pro   │
├─────────────────────────┤
│  📡 EMF Meter          │
│  📻 Spirit Box         │
│  🗣️  Ovilus Mode       │
│  📍 REM Pod            │
│  🎙️  EVP Recorder      │
│  ⚙️  Settings          │
│  📊 Session Log        │
└─────────────────────────┘
```

---

## 🎨 Touchscreen UI Libraries

### For ESP32 + TFT Displays

**TFT_eSPI Library** (Most Popular)
- Download via Arduino Library Manager
- Search: "TFT_eSPI"
- Supports: ILI9341, ILI9486, ST7735, etc.
- Touchscreen support included
- Fast graphics rendering

**LVGL (Light and Versatile Graphics Library)**
- Professional-looking UI
- Widgets: buttons, sliders, charts, keyboards
- Touch gestures
- More complex but very polished results
- Arduino library available

**Adafruit GFX + Touchscreen**
- Simpler alternative
- Good for basic UIs
- Libraries: Adafruit_GFX, Adafruit_ILI9341, Adafruit_STMPE610 (touch)

---

## 🖱️ Example Touchscreen UI Code

### Simple Menu with TFT_eSPI

```cpp
#include <TFT_eSPI.h>

TFT_eSPI tft = TFT_eSPI();

void setup() {
  tft.init();
  tft.setRotation(1); // Landscape
  tft.fillScreen(TFT_BLACK);

  drawMenu();
}

void drawMenu() {
  tft.fillScreen(TFT_BLACK);
  tft.setTextColor(TFT_GREEN, TFT_BLACK);
  tft.setTextSize(2);

  // Title
  tft.setCursor(50, 10);
  tft.println("Ghost Hunter");

  // Menu buttons
  drawButton(10, 50, 300, 40, "EMF Meter", TFT_BLUE);
  drawButton(10, 100, 300, 40, "Spirit Box", TFT_PURPLE);
  drawButton(10, 150, 300, 40, "Ovilus", TFT_ORANGE);
  drawButton(10, 200, 300, 40, "Settings", TFT_DARKGREY);
}

void drawButton(int x, int y, int w, int h, const char* label, uint16_t color) {
  tft.fillRoundRect(x, y, w, h, 8, color);
  tft.drawRoundRect(x, y, w, h, 8, TFT_WHITE);

  tft.setTextColor(TFT_WHITE);
  int textX = x + (w / 2) - (strlen(label) * 6);
  int textY = y + (h / 2) - 8;
  tft.setCursor(textX, textY);
  tft.println(label);
}

void loop() {
  uint16_t touchX, touchY;
  bool pressed = tft.getTouch(&touchX, &touchY);

  if (pressed) {
    if (touchY >= 50 && touchY <= 90) {
      // EMF Meter selected
      runEMFMeter();
    } else if (touchY >= 100 && touchY <= 140) {
      // Spirit Box selected
      runSpiritBox();
    }
    // etc...
  }

  delay(100);
}
```

---

## 📦 Recommended First Purchase

**Beginner Starter Kit ($60-80):**

1. ESP32 DevKit (3-pack) - $20
2. 2.8" TFT Touchscreen - $15
3. BME280 Sensor (3-pack) - $12
4. Breadboard + Jumper Wires - $12
5. LED Assortment - $10
6. Resistor Kit - $10
7. USB Cable - $5

**This lets you build:**
- Basic EMF meter (no touchscreen needed)
- Touchscreen environmental monitor (Ovilus prototype)
- REM Pod prototype

**Then expand with:**
- Audio components (DFPlayer, speaker)
- Radio module (Spirit Box)
- More sensors
- Batteries and charging

---

## 🔗 Amazon Search Terms Summary

Copy/paste these into Amazon:

- "ESP32 DevKit WROOM-32"
- "2.8 inch ILI9341 TFT LCD Touch Screen"
- "3.5 inch ILI9486 TFT LCD Touch Screen ESP32"
- "0.96 OLED I2C Display Arduino"
- "5-way joystick button module Arduino"
- "KY-040 Rotary Encoder Module"
- "BME280 I2C sensor module"
- "TEA5767 FM radio module"
- "DFPlayer Mini MP3 module"
- "18650 battery with charger"
- "TP4056 charging module USB-C"
- "WS2812B LED ring"
- "breadboard jumper wire kit"
- "soldering iron kit temperature control"

---

## 💾 SD Card for Word Databases

For Ovilus word database, use a small SD card:
- 4GB MicroSD: $5
- Store 2048 words in text file
- Also store MP3 pronunciations
- Format as FAT32

**Word Database Structure:**
```
/words/
  dictionary.txt    (2048 words, one per line)
  /audio/
    0000.mp3
    0001.mp3
    ...
    2047.mp3
```

---

## Next Steps

1. Order ESP32 starter kit
2. Get 2.8" touchscreen
3. Download Arduino IDE
4. Install TFT_eSPI library
5. Test touchscreen with example code
6. Choose first project (recommend REM Pod)
7. Follow build guide in `BUILD_GUIDES/`