Project Wire Routing Help
Yes, reconnect those missing ends to the correct nets.
Thought for 14 sec
I’ll reconnect those missing passive ends to 3V3 and the buck output now, then verify the same parts again.
Worked for 1 min 15 sec
Done — I reconnected the missing ends.
Fixed connections:
- L1 P2 → 3V3
- C7/C8/C11 P1 → 3V3
- R3/R4/R6/R7/R12/R13 P1 → 3V3
Verified:
- C7, C8, C11 now go between 3V3 and GND
- L1 now goes between BUCK_SW and 3V3
- The listed pull-up resistors now go between 3V3 and their signal nets
There are still other schematic warnings unrelated to that exact list, including U1:3V3, OLED1:3V3, U2:FB, and R5:P1, so the schematic still needs another cleanup pass before routing/manufacturing.
Fix remaining warnings
Explain warnings
Run full review
Fix schematic first
Check buck circuit
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BOM Cost Optimization Notes
Current cost/manufacturing status
Manufacturing review currently reports 28 missing manufacturer part numbers. The missing items are concentrated in low-cost mechanical/passive parts:
- 5x 2-position 5.00 mm terminal blocks: J1, J2, J3, J4, J5
- 5x 6 mm through-hole tactile switches: SW1, SW2, SW3, SW4, SW5
- 11x generic 0603 resistors: R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13
- 6x generic capacitors: C6, C7, C8, C10, C11, C12
- 1x buck inductor: L1
The already-MPN parts are: USB-C receptacle, TVS diodes, Schottky diode, AP63203 buck regulator, and ESP32-S3-WROOM module.
Cost-priority recommendations
1. Keep the universal PCB approach for now
One universal WiFi node PCB is likely lower total development cost than separate Well/Tank PCB variants, because it avoids maintaining multiple layouts and BOMs. The cost tradeoff is a few extra unpopulated/unused connector and button functions per node.
Recommended strategy: build one universal board and configure each node in firmware as Well 1, Well 2, or Tank.
2. Standardize passive values and packages
Most resistors are already 0603, which is a good cost/assembly compromise. Recommended MPN family for cost/availability is Yageo RC0603FR-07 series or equivalent 1% thick-film 0603 resistors.
Resistor groups:
Table
| Value | Designators | Function |
|---|---|---|
| 4.7kΩ | R5, R12 | I2C pull-ups |
| 10kΩ | R3, R4, R6, R7, R13 | EN/GPIO/input pull-ups |
| 5.1kΩ | R10, R11 | USB-C CC sink pull-downs |
| 100Ω | R8 | Contactor-driver input series resistor |
| 100kΩ | R9 | Contactor-driver pull-down |
3. Review capacitor packages before locking MPNs
Current capacitor values:
Table
| Value / Rating | Designators | Current package | Note |
|---|---|---|---|
| 100nF / 10V | C11, C12 | 0603 | Good as generic decoupling/reset caps |
| 100nF / 25V | C10 | 0603 | Good for bootstrap cap |
| 10µF / 50V | C6 | 0603 | May be difficult/expensive in true 0603 with useful capacitance; consider 0805/1206 |
| 22µF / 10V | C7, C8 | 0603 | Likely suffers DC-bias derating; consider 0805/1206 for better real capacitance |
Cost/quality recommendation: keep 100nF caps in 0603, but move the power-supply bulk capacitors to 0805 or 1206 before selecting final MPNs.
4. Inductor package needs correction before MPN lock
L1 is currently marked 3.9µH, >=2.7A saturation current, but has an SMD_0603 package. A 3.9µH / ~3A buck inductor should not be in an 0603 chip package.
Recommended next action: change L1 to an appropriate shielded power-inductor package such as a 4x4 mm class footprint, then select a real MPN with saturation current above the AP63203 peak-current requirement.
5. Terminal blocks and switches
The 5.00 mm terminal blocks are appropriate for field wiring and are worth keeping through-hole for reliability. The 6 mm tactile switches are inexpensive and beginner-friendly to inspect/rework.
Final MPNs should be chosen from common stocked parts once the assembly vendor preference is known. If using JLCPCB assembly, prefer LCSC basic/common parts where possible.
Recommended next actions
- Correct L1 package/MPN first because it affects regulator reliability.
- Move C6/C7/C8 to physically realistic packages if needed.
- Assign grouped resistor MPNs by value.
- Assign terminal block and switch MPNs.
- Re-run manufacturing review to confirm missing-MPN count decreases.
- Investigate the 5 remaining copper-overlap DRC errors before routing.
Current cost/manufacturing status
Cost-priority recommendations
1. Keep the universal PCB approach for now
2. Standardize passive values and packages
3. Review capacitor packages before locking MPNs
4. Inductor package needs correction before MPN lock
5. Terminal blocks and switches
Recommended next actions
