e53c928e44
document display architecture research and settled design decisions
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- eDP direct connection ruled out: undocumented pinouts, voltage mismatch risk,
community consensus favors controller boards
- MIPI DSI ruled out: 2-lane 15-pin, can't dual-display with HDMI on Linux,
and the salvaged panel is eDP
- Chosen path: HDMI -> eDP-to-HDMI controller board -> salvaged panel
- Mechanical HDMI A/B switch retained as fallback for external display
2026-05-27 01:12:00 +00:00
ce2d3be1e1
Merge for component diagrams of Orange Pi 3B
2026-05-27 00:48:22 +00:00
05a71c30ad
add Orange Pi 3B bottom view photo
2026-05-27 00:47:28 +00:00
7bb9cb887c
add Orange Pi 3B component diagram as asset
2026-05-27 00:44:21 +00:00
3c11190822
update all docs: Orange Pi 3B 8GB purchased (89)
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- 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
2026-05-24 06:51:26 +00:00
ef9a7f40a8
add port layout and video output decisions
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- Mechanical HDMI A/B switch for internal/external display toggle
- DisplayLink rejected: no ARM drivers exist
- 10-port layout split across 4 surfaces
- Port side: 4x USB-A, 1x USB-C data, 1x USB-C PD out
- Starboard: Ethernet, HDMI out, 3.5mm audio
- Bow: USB-C power input + fan exhaust
- Stern: handle, SD reader, Kensington lock
- Updated BOM with HDMI switch, panel-mount cables, SD reader
- Cost estimate now ~58
2026-05-12 07:18:54 +00:00
abfedbb7f2
add carry handle decision: stern edge, with lid latch planned
2026-05-12 06:49:46 +00:00
db353ad2d1
add power system: IP5389 board + 18650 array decision
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- IP5389 power bank board selected (preliminary)
- All-in-one: charging, BMS, USB-C PD output
- Rejected K501U battery (integrated BMS not reusable)
- Documented alternatives considered (TP5100+2S BMS+buck, UPS HAT)
- Updated parts list with power system BOM
- Cost estimate now 06-230 (was 70-190)
- Added power-system.md, updated design-decisions.md
2026-05-12 06:02:51 +00:00
a601bddd1a
add design decisions: nomenclature, build approach, bow wall functions
2026-05-12 05:15:38 +00:00
BarnacleBoy
8b41038be7
Initial commit: cyberdeck project planning docs
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- Salvage analysis of K501U components
- Orange Pi 5 SBC selection rationale
- Storage architecture (SD card + USB)
- USB hub expansion plan
- Parts list and cost estimates
2026-05-08 22:48:30 +00:00
