# Parts List

## Bill of Materials

### Core Components

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| SBC | Orange Pi 3B 8GB + 256GB eMMC | Amazon | $189 | **Purchased** |
| Display controller | 30-pin eDP to HDMI | Amazon/eBay | $24 | Ordered — arriving in ~2 weeks |

### Salvaged from K501U

| Item | Status | Notes |
|------|--------|-------|
| Display (Innolux N156HGE-EAB) | Available | Connects via eDP-to-HDMI controller board |
| Hinge mechanism | Available | Intact |
| WiFi antenna | Available | OPi3B has built-in WiFi — antenna may still be useful for signal |
| Webcam | Available | In bezel |
| Cooling fan | Available | 4-pin PWM |

### USB Expansion

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| USB hub | Powered 10-port USB 3.0 | Amazon | $20-25 | To purchase |
| USB enclosure | SATA 2.5" USB 3.0 | Amazon | $10-15 | To purchase |
| (or) USB flash | 128GB USB 3.0 | Amazon | $15-25 | Alternative |

### Power

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
|| Banggood power board | QC3.0 3S-5S 65W-100W PD, bare PCB | Banggood (ID 1990904) | $14.39 | **Purchased** — 3S-65W variant |
|| 18650 cells (x6) | 3S2P, matched | Banggood | $48.04 | **Purchased** |
|| Cell holders (x8) | Single 18650 slot | Banggood | $7.99 | **Purchased** (6 + 2 spares) |
|| 5A blade fuse + holder | Automotive | — | $2 | To purchase |

### Audio

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
|| PAM8403 amp module | 3W+3W, 5V, Class D, single turn knob | Banggood | $3.59 | **Purchased** |
|| 4Ω 3W speakers (x2) | Small drivers, ~31×70mm | — | $5-10 | To purchase |

### Networking

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| WiFi | Built-in OPi3B | Included | $0 | **Built-in** |
| WiFi antenna | K501U salvage or new | — | $0 | May reuse K501U antenna |

### Video & Case Integration

| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| HDMI A/B switch | Mechanical, passive, bi-directional | Amazon | $8-12 | To purchase |
| Panel-mount cables | USB-A, USB-C, HDMI, Ethernet, audio | Amazon | $15-25 | To purchase |
| Panel-mount SD reader | USB 3.0 | Amazon | $5-8 | To purchase |

| Item | Purpose | Source | Est. Cost |
|------|---------|--------|-----------|
| Heatsink + fan | Cooling | AliExpress | $5-10 |
| Panel-mount cables | Case integration | Amazon | $10-20 |
| SD card reader | Backup/imaging | Amazon | $8-12 |

---

## Cost Summary

### Actual Spend

| Item | Cost | Status |
|------|------|--------|
|| Orange Pi 3B 8GB + 256GB eMMC | $189 | **Purchased** |
|| Display controller | $24 | Ordered (may be optional) |
|| Power board (Banggood 3S-65W) | $14.39 | **Purchased** |
|| 18650 cells (x6) + holders (x8) | $56.03 | **Purchased** |
|| PAM8403 audio amp | $3.59 | **Purchased** |
|| OPi 3B metal case + fan | $16.78 | **Purchased** |
|| **Spent so far** | **$303.79** | |

### Remaining to Purchase

| Category | Cost |
|----------|------|
|| Storage (USB enclosure) | ~$12 |
|| USB hub (powered 10-port) | ~$22 |
|| Power (fuse + misc) | ~$2 |
|| Speakers | ~$8 |
|| HDMI switch | ~$10 |
|| Panel-mount cables + SD reader | ~$23 |
|| **Remaining** | **~$77** |

### Total Project

| | |
|---|----|
|| Spent | $303.79 |
|| Remaining | ~$77 |
|| **Estimated total** | **~$380** |

---

## Ordered Items

| Item | Date Ordered | Est. Arrival | Source | Tracking |
|------|-------------|--------------|--------|----------|
|| Orange Pi 3B 8GB + 256GB eMMC | Before May 24 | Delivered | Amazon | — |
|| Display controller board | TBD | 2-4 weeks | Amazon/eBay | TBD |
|| Banggood power board + cells + holders + amp + case + fan | Jun 3 | TBD | Banggood | TBD |

## Pending Purchases

- Powered USB hub (10-port USB 3.0)
- USB enclosure or flash drive
- 5A fuse + holder
- 4Ω 3W speakers (x2)
- Mechanical HDMI A/B switch
- Panel-mount cables (USB-A, USB-C, HDMI, Ethernet, audio)
- Panel-mount SD card reader
- Heatsink for RK3566

---

## Supplier Links (Research)

*Add actual links when ordering:*

- Orange Pi 3B: Amazon "Orange Pi 3B 8GB 256GB eMMC"
- Display controller: Amazon search "N156HGE-EAB controller board" or "30-pin eDP to HDMI"
- USB hub: Amazon "Sabrent 7-port USB 3.0 powered"