Project Definition Brainstorming

Started implementing a plan

High-level goal: Design a compact inline “AI calculator cable” PCB using ESP32-S3-WROOM-1-N16R8, powered from USB-C 5V into AP2112K-3.3, and communicating USB 2.0 to a TI-Nspire CX II via hardwired mini-USB OTG (ID tied to GND). Finalize schematic + PCB so it is fully routed, DRC/E RC clean, and ready for JLCPCB assembly outputs.

What has been completed:

- Schematic created with required blocks: ESP32-S3-WROOM-1-N16R8 (native USB), USB-C 2.0 receptacle (J1) with 5.1k Rd on CC1/CC2, AP2112K-3.3TRG1 LDO (U2) with EN tied to VIN, input/output 10uF caps, multiple 0.1uF decouplers + optional 1uF near ESP32, USBLC6-2SC6 ESD (D1) on D+/D-, hardwired mini-USB (J2 UX60SC-MB-5ST(80)) with ID to GND for OTG host mode, BOOT and RESET/EN buttons, and a status LED + resistor.

- PCB layout initialized: 70 mm x 22 mm, 4-layer stackup; initial placement with J1 and J2 at opposite ends and ESP32 near an edge; project documentation added (esp32-s3-ai-calculator-cable-design-notes).

- Baseline layout rules updated for manufacturability (minTraceWidth 0.15 mm; preferred widths 0.15/0.25/0.4 mm).

- DRC status checked: outstanding errors include 34 airwires (unrouted nets) and 2 overlapping-copper violations (likely around SW1/SW2); no dangling-trace issues were reported in the last review.

Implementation plan (remaining work only):

1. Fix DRC overlap errors

1. Identify the exact copper/features causing the 2 overlapping-copper violations.

2. Adjust PCB placement of the offending parts (likely SW1/SW2) to eliminate pad/copper overlap while keeping the inline form factor.

3. Re-run DRC for overlapping copper to confirm it is cleared.

2. Placement optimization for routing and RF keepout

1. Re-pack components to fit within 70 mm x 22 mm (or slightly resize if needed) so the aggregate component bounds do not exceed the board.

2. Ensure ESP32 antenna edge placement and keepout (no copper/pours/components under antenna on all layers).

3. Place decoupling caps tight to ESP32 3V3/GND pins and keep USBLC6 close to the USB data path.

3. Complete PCB routing

1. Route power first (VBUS_5V to U2 VIN; U2 VOUT/3V3 to ESP32 3V3 pins) with wider traces; ensure solid return paths to GND.

2. Route USB differential pair (USB_DP/USB_DM) short, coupled, length-matched, and with minimal vias; keep ESD close to connector/entry.

3. Route remaining low-speed signals (BOOT, EN/RESET, LED) and any remaining nets.

4. Add/verify GND copper fills and stitching as appropriate while respecting antenna keepout.

4. Iterate validation to DRC/ERC clean

1. Re-run DRC (airwires, overlap, clearance) until 0 errors.

2. Re-run ERC checks for floating/undriven pins or single-pin nets and fix any schematic issues found.

5. Manufacturing preparation for JLCPCB assembly

1. Verify all parts have correct footprints and MPNs where required; ensure passives have values and package sizes.

2. Update design notes with final routing guidance, OTG wiring notes, enclosure/strain-relief guidance, and assembly notes.

3. Export Gerbers, BOM, and pick-and-place (CPL) for JLCPCB; optionally export STEP for enclosure fit-check.

Execution stopped due to insufficient credits.

0:19

flux

0:00

Work done
  • I cannot make additional project edits in this session because execution credits are exhausted.
  • Current known project state from the brief: schematic is already created with the required ESP32-S3, USB-C power/flashing, AP2112K 3.3 V regulator, USBLC6 USB ESD, hardwired mini-USB OTG with ID tied to GND, BOOT/RESET buttons, LED, and decoupling.
  • PCB is initialized as a compact 70 mm x 22 mm 4-layer inline board with baseline manufacturable rules already set.
Success criteria review
  • ✅ Schematic blocks are present.
  • ✅ Board outline, stackup, initial placement, and baseline trace rules are present.
  • ❌ PCB is not finished yet: 34 airwires remain.
  • ❌ DRC is not clean yet: 2 overlapping-copper violations remain, likely around SW1/SW2.
  • ❌ JLCPCB outputs should not be generated until routing and DRC/ERC cleanup are complete.
Next steps
Resume with a work-capable session to finish the product: fix SW1/SW2 copper overlap, repack placement while preserving ESP32 antenna keepout, route power/USB/low-speed nets, iterate DRC/ERC to zero actionable errors, update the design notes, then export Gerbers, BOM, CPL/pick-and-place, and optionally STEP for JLCPCB/enclosure fit-check.
Sign up to send
J1
R2
Resistance
5.1 kΩ
C3
Capacitance
0.1 µF
U2 VOUT - U1 3V3
U1 IO48 - R5 P1
J1 CC2 - R2 P1
R5
Resistance
1 kΩ
R5 P2 - LED1 A
U2 VOUT - U1 3V3
J1 D- - J2 2
J1 CC1 - R1 P1
U2 VOUT - U1 3V3
J1 CC2 - R2 P1
C5
Capacitance
1 µF
J1 D+ - J2 3
R1
Resistance
5.1 kΩ
U1 EN - R3 P2
J1 VBUS - U2 VIN
C6
Capacitance
0.1 µF
C4
Capacitance
0.1 µF
J1 CC1 - R1 P1
U1 GND - U2 GND
J2 4 - C1 P2
J1 GND - D1 GND
J2 4 - C1 P2
J2 4 - C1 P2
J2 4 - C1 P2
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    16.1k
  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
    jharwinbarrozo
    43.0M
  • RMCF0805JT47K0
    RMCF0805JT47K0
    General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
    jharwinbarrozo
    1.1M
  • 1070TR
    1070TR
    Battery Holder (Open) Coin, 20.0mm 1 Cell SMD (SMT) Tab bate or batt #forLedBlink
    jharwinbarrozo
    700.5k

ESP32-S3 AI Calculator Cable

ESP32-S3 AI Calculator Cable thumbnail
Compact inline ESP32-S3 USB-C powered OTG cable interface for TI-Nspire CX II calculators

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$0.75–$1.40

Digi-Key

$6.34–$8.76

HQonline

$2.05–$2.15

LCSC

$8.41–$8.57

Mouser

$11.58

TME

$1.67

Verical

$1.80–$33.28

Controls