Reworks the board further

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2026-08-28 17:17:54 +02:00
parent 009a643698
commit 34c54d68b0
14 changed files with 38877 additions and 7103 deletions
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@@ -26,6 +26,28 @@ running list — items are **not** being worked yet, just recorded.
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## V2 schematic changes already applied (2026-08-25)
- **U7 EEPROM → 93LC56B** (LCSC C6164, MPN 93LC56BT-I/SN, same SOIC-8). Fixes the
soft-brick (256 B is the FT2232H's full EEPROM size). [TODO/REVIEW updated]
- **All 7 LEDs → Everlight 24-21 reverse-mount 1206** (bottom-viewed, top-populated
single-side assembly): red D7/D11 = **C2892757** (24-21SURC), green
D6/D8/D9/D12 = **C2980185** (24-21/G6C), amber D13 = **C424133** (24-21UYC).
All Vf ≈ 2.0 V (3.3 V-rail + SB_RGBA_DRV safe), moderate mcd. New footprint
`hardware/LED_1206_ReverseMount_Everlight_24-21.kicad_mod` (pad1=cathode,
ø1.5 mm Edge.Cuts light-window). **⚠️ VERIFY the land + light-window aperture
against the 24-21 datasheet during PCB layout** (footprint is a starting point).
- **LED series resistors R37/R41/R42: 49.9 Ω → 330 Ω** (reused existing part
C25104; R38 already 330). ~3.9 mA vs the blinding ~26 mA — closes item 1's
resistor half. Green PWM (`_GRN_DUTY`) in gateware still applies to D6/D12; the
new green is only 1845 mcd so it can likely be relaxed.
- **Gateware (`synth.py`):** RGB drive bug fixed (raw-pad `o_RGB*`) + green PWM
dimming — see items 1 & 5.
Still open below: GC_ON handover redesign (#2), the datasheet-aperture verify,
EXI/W5100 functional validation (needs a working board), plus the ground-plane
fill for fab.
## TODO
### 1. LED brightness — LED_G and the two transistor-driven LEDs are blindingly bright