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update all docs: Orange Pi 3B 8GB purchased (89)

Browse source 
- docs/sbc-selection.md: full rewrite for OPi 3B specs (RK3566, 8GB, 256GB eMMC, built-in WiFi)
- README.md: SBC description, checklist, components table, quick ref, cost estimate
- docs/parts-list.md: SBC marked purchased, eMMC/controller/WiFi changes
- docs/design-decisions.md: WiFi exclusion reason, native eDP, power input
- docs/salvage-analysis.md: WiFi card not needed, cooling fan, summary tables
- docs/storage-architecture.md: rewritten for 256GB eMMC primary boot
- docs/usb-expansion.md: 2x USB3 native, port allocation, power budget
- docs/port-layout.md: OPi3B port differences (eDP, power-only USB-C, built-in WiFi)
- docs/power-system.md: lower power draw context
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BarnacleBoy 2026-05-24 06:51:26 +00:00
parent ef9a7f40a8
commit 3c11190822
9 changed files with 330 additions and 347 deletions
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74
docs/parts-list.md
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@ -6,17 +6,16 @@
| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| SBC | Orange Pi 5 16GB (base) | eBay | $99 + $5 shipping | Bid pending |
| Display controller | 30-pin eDP to HDMI | Amazon/eBay | $24 | Ordered |
| MicroSD card | 64GB Endurance | Amazon | $10-12 | To purchase |
| SBC | Orange Pi 3B 8GB + 256GB eMMC | Amazon | $189 | **Purchased** |
| Display controller | 30-pin eDP to HDMI | Amazon/eBay | $24 | Ordered — may be optional (OPi3B has native eDP) |
### Salvaged from K501U
| Item | Status | Notes |
|------|--------|-------|
| Display (Innolux N156HGE-EAB) | Available | Controller board ordered |
| Display (Innolux N156HGE-EAB) | Available | May connect via native eDP on OPi3B |
| Hinge mechanism | Available | Intact |
| WiFi antenna | Available | In hinge |
| 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 |
@ -35,13 +34,14 @@
| IP5389 power board | USB-C PD, 3S, bare PCB | AliExpress | $8-15 | Preliminary selection |
| 18650 cells | 3S or 3S2P, quality brand | User's pick | $12-24 | To purchase |
| 5A blade fuse + holder | Automotive | Amazon | $2 | To purchase |
| USB-C wall charger | 45W+ PD, for charging | Amazon | $10-15 | To purchase |
| USB-C wall charger | 5V/3A, for testing | Amazon | $8-12 | To purchase |
### Networking
| Item | Specification | Source | Est. Cost | Status |
|------|--------------|--------|-----------|--------|
| WiFi dongle | USB, Linux-compatible | Amazon | $10-15 | To purchase |
| WiFi | Built-in OPi3B | Included | $0 | **Built-in** |
| WiFi antenna | K501U salvage or new | — | $0 | May reuse K501U antenna |
### Video & Case Integration
@ -51,7 +51,7 @@
| 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 |
| Item | Purpose | Source | Est. Cost |
|------|---------|--------|-----------|
| Heatsink + fan | Cooling | AliExpress | $5-10 |
| Panel-mount cables | Case integration | Amazon | $10-20 |
@ -61,36 +61,32 @@
## Cost Summary
### Minimum Viable Build
### Actual Spend
| Item | Cost | Status |
|------|------|--------|
| Orange Pi 3B 8GB + 256GB eMMC | $189 | **Purchased** |
| Display controller | $24 | Ordered (may be optional) |
| **Spent so far** | **$213** | |
### Remaining to Purchase
| Category | Cost |
|----------|------|
| SBC | $104 |
| Display controller | $24 |
| MicroSD | $12 |
| USB hub | $22 |
| USB enclosure | $12 |
| Power system (board+cells+fuse+charger) | $44 |
| WiFi dongle | $12 |
| HDMI switch | $10 |
| Panel-mount cables + SD reader | $23 |
| **Subtotal** | **$258** |
| Storage (USB enclosure) | ~$12 |
| USB hub (powered 10-port) | ~$22 |
| Power system (board+cells+fuse+charger) | ~$44 |
| HDMI switch | ~$10 |
| Panel-mount cables + SD reader | ~$23 |
| **Remaining** | **~$111** |
### With Optional Items
### Total Project
| Category | Cost |
|----------|------|
| Base build | $258 |
| Heatsink/cooling | $10 |
| **Total** | **$268** |
### Future Additions
| Category | Cost |
|----------|------|
| Battery pack (portable) | Integrated in base build |
| Case materials | TBD |
| Custom PCB | TBD |
| | |
|---|----|
| Spent | $213 |
| Remaining | ~$111 |
| **Estimated total** | **~$324** |
---
@ -98,21 +94,20 @@
| 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 |
## Pending Purchases
- MicroSD card
- Powered USB hub
- Powered USB hub (10-port USB 3.0)
- USB enclosure or flash drive
- IP5389 power board + 18650 cells
- 5A fuse + holder
- USB-C PD wall charger (45W+)
- Powered 10-port USB 3.0 hub
- USB-C wall charger (5V/3A)
- Mechanical HDMI A/B switch
- Panel-mount cables (USB-A, USB-C, HDMI, Ethernet, audio)
- Panel-mount SD card reader
- WiFi dongle
- Heatsink for RK3566
---
@ -120,7 +115,6 @@
*Add actual links when ordering:*
- Orange Pi 5: eBay search for "Orange Pi 5 16GB"
- 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"
- MicroSD: Amazon "SanDisk Endurance 64GB" or "Samsung PRO Endurance 64GB"