Project Start Guidance

Worked for 1 min 53 sec
Reading CR1632 Tracker Redesign's report…
Thought for 14 sec — Assessing design alternatives
Searched "Identify the exact current components and connecti..." — 830 results.
Completed 13 design checks — found 162 issues.
Thought for 29 sec — Documenting pin connections
Thought for 13 sec — Evaluating design options
Steering CR1632 Tracker Redesign…
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CR1632 Tracker Redesign
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Thought for 9 sec
Awaiting 1 background task
"CR1632 Tracker Redesign" completed.

flux

The final schematic cleanup is complete. I’m confirming that only the real reservoir remains and then I’ll close this phase with the mechanical go/no-go for the 25 mm prototype.

flux

The CR1632/QFN schematic redesign is complete and ERC-clean at 68 components / 43 nets. It now uses the DW3210 QFN, TPS63900 2.7 V rail, MAX40200 reverse-current protection, switched battery monitoring, and correct RF2 termination; all charging circuitry is removed.
Blocking issue
  • The only credible reservoir found is a 3.5 F, 20 × 10 × 22 mm supercapacitor. It supports the coin cell electrically but cannot fit inside the 25 mm golf-ball assembly.
  • A CR1632 alone cannot reliably supply the DW3210’s UWB current peaks.
Next decision
  • Use the CR1632 and external supercapacitor for a bench-only electronics prototype, or
  • Return to a compact high-rate rechargeable/custom cell for the in-ball prototype.
I have paused placement rather than creating a mechanically impossible board. Please choose the bench-only CR1632 version or the in-ball high-rate-cell version.
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Files

Schematic

Layout

3D View

Placement and Rigid-Flex Checkpoint
Current status
The PCB placement was not modified during the primary-cell schematic correction. The existing PCB is historical and no longer matches the current 68-component schematic.
Preserved mechanical intent
  • Two nominal 25 mm rigid islands connected by a flex neck remain the intended folded architecture.
  • The factory-tabbed CR1632 thickness must remain a variable; the present planning reservation is 3.3 mm but is not frozen.
  • UWB/BLE antennas, SWD access, and the open-drain-safe DW3210 reset architecture remain required.
  • No inductive receive coil, LiPo pouch, charger, or charge LED is part of the current prototype architecture.
New parts requiring future PCB reconciliation

Table

ReferencePartMechanical implication
C53SCM5R5355B, 3.5 F20 × 10 × 22 mm, through-hole, 5.5 mm lead spacing; suitable only for an external/tall bench prototype and incompatible with the intended thin folded tracker
U6MAX40200AUK+TSOT-23-5 ideal-diode stage in the CR1632 charge path
R2250 Ω 0402Must sit very close to DW3210 RF2 with a controlled 50 Ω connection and minimal TP12 stub
R23/R241 MΩ / 330 kΩ 0402Battery-monitor divider; should be close to the MCU ADC/control pins and away from RF feed structures
Hard blockers before placement or routing
  1. Reservoir selection: C53 lacks numeric leakage, DC ESR, peak-current, and pulse-life specifications. A compact thin reservoir must replace it before product placement.
  2. Reservoir height: the 22 mm body invalidates the folded tracker thickness target; use it off-board or on a dedicated bench carrier only.
  3. Schematic/layout mismatch: removed charging parts may still exist in the historical layout, while U3/U4/U6/C53/R22-R24 are not reconciled.
  4. RF2 physical implementation: R22 placement and the RF2 50 Ω trace must be reviewed with the final stackup; TP12 must not create a long RF stub.
  5. Cold-start validation: the empty 3.5 F reservoir may require roughly 18 minutes to reach converter startup and about 58 minutes for 95% charge through 330 Ω.
Next mechanical gate
Do not auto-place or route the present bench reservoir into the folded board. First run the power prototype with C53 off-board, measure leakage/startup/droop at room and cold temperature, then select a thin qualified pulse component and rebuild PCB placement around the actual battery and reservoir dimensions.

  • Current status

  • Preserved mechanical intent

  • New parts requiring future PCB reconciliation

  • Hard blockers before placement or routing

  • Next mechanical gate