Aurora Hearing Device Design


flux

Blocked: your account is currently out of ACUs, so I can’t mutate the board/layout further in this run.
Accomplished this session:
  • Started the 12 mm product-like redesign workflow.
  • Loaded the required layout/component procedures for the crescent board, compact part replacement, and placement constraints.
  • Confirmed the next execution plan: 12 mm max-width smooth crescent, 4-layer stackup, compact USB-C replacement, high-SPL mic replacement, removal/shrinking of bulky hook-side parts, and dense two-sided placement.
Remaining:
  • Apply the new 12 mm crescent board outline and 4-layer stackup.
  • Replace/flag oversized parts: current USB-C, ICS-40730 mics, large flash, tactile switch, and bulky connectors.
  • Re-place the hook PCB components into the slim crescent form factor.
  • Run layout fit/congestion checks and update the project documentation.
Estimate the ACUs needed to finish the 12 mm redesign.

flux

Estimate: ~25–45 ACUs to finish a credible 12 mm hook redesign pass.
Breakdown:
  • Apply 12 mm crescent outline + 4-layer stackup: 2–5 ACUs
  • Research/replace compact USB-C + high-SPL mics + smaller flash/switch/connectors: 6–12 ACUs
  • Re-place dense two-sided hook layout: 8–15 ACUs
  • Fit/congestion/layout verification: 4–8 ACUs
  • Update project docs and next-step notes: 2–5 ACUs
If we also route the board afterward, budget another 40–90 ACUs, because fine-pitch nRF5340/CS47L63, RF, USB, and dense wearable placement will likely need multiple iterations.
Proceed after ACUs
Prioritize fit check
Research compact parts
Update migration plan
Review power impact

Project Aura Hearing Device

Project Aura Hearing Device thumbnail