Analog Bicycle Light Schematic

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The current board has no bottom artwork, so I’m adding a centered white product-style panel on bottom silkscreen only, sized to fit within the 45 × 34 mm outline.

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The artwork was added, but the layer identifier needs correction from the generic bottom-silkscreen name to this board’s exact Bottom Overlay layer.

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The editable layer value is Bottom for standalone artwork on this stackup, so I’m applying that exact layer now.

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The artwork is now on the valid bottom-side layer. I’m visually checking the result and running DRC.

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The layout checks are clean; I’m explicitly setting the PCB silkscreen color to white so the new bottom artwork renders as intended in 3D.

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Updated only the PCB bottom-side artwork: added the bicycle/light graphic, divider lines, five feature descriptions with line icons, and centered “Flux” branding. Silkscreen color is set to white.
Remaining issues:
  • None reported by DRC.
  • Schematic, electrical connections, component placement, and routing were unchanged.
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Final Component Replacement Table and Validation Report
Project: Simple Analog Smart Bike Light / Automatic Bike Light
Scope
Applied requested sequential reference designators, manufacturer names, MPNs, LCSC/JLCPCB C-numbers where supported by component properties, package/value metadata, PCB footprint/package updates for configurable generic footprints, PCB placement update, and rerouting after placement changes. Existing schematic topology and net connections were preserved.
Flux currently exposes LCSC Part Number as a standard component property. A separate standard JLCPCB Part Number property was not available in the property schema, so the requested C-number was entered in LCSC Part Number for each physical component.
Final component table

Table

RefFormer refValue / FunctionManufacturerMPNLCSC/JLCPCB C#Package / FootprintStatus
C1C_BAT4.7 uF, 16 V, X5R, ±10%Samsung Electro-MechanicsCL10A475KO8NNNCC196660603Properties applied; exact Flux library part not available, so underlying component remains generic capacitor.
C2C_CHG_IN4.7 uF, 16 V, X5R, ±10%Samsung Electro-MechanicsCL10A475KO8NNNCC196660603Properties applied; exact Flux library part not available, so underlying component remains generic capacitor.
C3C_CHG_DEC100 nF, 50 V, X7R, ±10%Samsung Electro-MechanicsCL10B104KB8NNNCC15910603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C4C_DARK_DEC100 nF, 50 V, X7R, ±10%Samsung Electro-MechanicsCL10B104KB8NNNCC15910603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C5C_LED_DEC100 nF, 50 V, X7R, ±10%Samsung Electro-MechanicsCL10B104KB8NNNCC15910603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C6C_TIMER_DEC100 nF, 50 V, X7R, ±10%Samsung Electro-MechanicsCL10B104KB8NNNCC15910603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C7C_COMP220 nF, 25 V, X7R, ±10%Samsung Electro-MechanicsCL10B224KA8NNNCC211200603Properties applied; exact Flux library part not available, so underlying component remains generic capacitor.
C8C_CTRL10 nF, 50 V, X7R, ±10%YAGEOCC0603KRX7R9BB103C1000420603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C9C_LED_IN10 uF, 10 V, X5R, ±10%Samsung Electro-MechanicsCL10A106KP8NNNCC197020603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C10C_USB_IN10 uF, 10 V, X5R, ±10%Samsung Electro-MechanicsCL10A106KP8NNNCC197020603Properties applied and footprint changed from previous 0805 to 0603; exact library part found, but not component-swapped to avoid breaking nets.
C11C_LED_OUT1 uF, 50 V, X5R, ±10%Samsung Electro-MechanicsCL10A105KB8NNNCC158490603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
C12C_TIME47 uF, 10 V, X5R, ±10%CCTCTCC1206X5R476K100HTC54490281206Properties applied and generic footprint changed to 1206; exact Flux library part not available.
D1D_AND120 V, 500 mA SchottkyonsemiMBR0520LT1GC23848SOD-123Existing exact/compatible component retained; properties updated.
D2D_AND220 V, 500 mA SchottkyonsemiMBR0520LT1GC23848SOD-123Existing exact/compatible component retained; properties updated.
D3D_BOOST40 V, 3 A SchottkyonsemiMBRA340T3GC26178SMA / DO-214ACExisting exact/compatible component retained; properties updated.
D4D_CHGRed status LEDHubei KENTOKT-0603RC22860603 LEDExisting exact/compatible component retained; properties updated.
J1J_BAT2-pin battery connector, 2.0 mmJSTB2B-PH-K-S(LF)(SN)C131337JST PH through-hole 2-pinExisting connector retained; properties updated.
J2J_LED2-pin LED connector, 2.0 mmJSTB2B-PH-K-S(LF)(SN)C131337JST PH through-hole 2-pinExisting connector retained; properties updated.
J3J_USBUSB Type-C power connectorGlobal Connector TechnologyUSB4215-03-AC37616412USB4215-03-A footprintExisting exact/compatible component retained; properties updated.
L1L_BOOST10 uH power inductor, 2 A / 2.8 A satAPVAPH303015C100MP03C42455385SMD 3 x 3 mmProperties applied; exact Flux library part not available, so underlying library component still shows SRN3012BTA-100M.
R1R_CC15.1 kΩ, ±1%, 100 mWYAGEORC0603FR-075K1LC1055800603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
R2R_CC25.1 kΩ, ±1%, 100 mWYAGEORC0603FR-075K1LC1055800603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
R3R_CHG_LED1 kΩ, ±1%, 100 mWYAGEORC0603FR-071KLC225480603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
R4R_DARK_PU100 kΩ, ±1%, 100 mWYAGEORC0603FR-07100KLC146750603Properties applied; exact Flux library part not available, so underlying component remains generic resistor.
R5R_LDR_BIAS100 kΩ, ±1%, 100 mWYAGEORC0603FR-07100KLC146750603Properties applied; exact Flux library part not available, so underlying component remains generic resistor.
R6R_LED_EN_PU100 kΩ, ±1%, 100 mWYAGEORC0603FR-07100KLC146750603Properties applied; exact Flux library part not available, so underlying component remains generic resistor.
R7R_MOTION_PU100 kΩ, ±1%, 100 mWYAGEORC0603FR-07100KLC146750603Properties applied; exact Flux library part not available, so underlying component remains generic resistor.
R8R_LDRLDR, 8–20 kΩ light, ~1 MΩ darkJCHLGL5528(10-20)C10081TH, 3.4 mm pitchExisting LDR retained; exact MPN found in library but with different C-number, so no part swap performed.
R9R_PROG2 kΩ, ±1%, 100 mWYAGEORC0603FR-072KLC1055760603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
R10R_SENSE0.68 Ω, ±1%, 250 mWYAGEOPT1206FR-070R68LC8587691206Properties applied and generic footprint changed to 1206; exact Flux library part not available.
R11R_TIME1 MΩ, ±1%, 100 mWYAGEORC0603FR-071MLC1055780603Properties applied; exact Flux library part found, but not component-swapped to avoid breaking nets.
RV1RV_DARK_3P100 kΩ trimmer potentiometerBourns3362P-1-104LFC81266TH 3-pin, 7 x 6.6 mmExisting exact/compatible component retained; properties updated.
SW1S_MOTIONVibration / motion switchSHOU HANSW-18010PC2681585Through-holeExisting exact/compatible component retained; properties updated.
U1U_CHGSingle-cell Li-ion/Li-Po chargerMicrochipMCP73831T-2DCI/OTC625597SOT-23-5Existing exact/compatible component retained; properties updated.
U2U_DARKDual voltage comparatorTexas InstrumentsLM393DRC67470SOIC-8Properties applied; exact Flux library part not available, so underlying part still shows LM393DRG4.
U3U_LEDConstant-current boost LED driverTexas InstrumentsTPS61165DBVTC702282SOT-23-6Existing exact/compatible component retained; properties updated.
U4U_TIMERCMOS 555 timerTexas InstrumentsTLC555CDRC6986SOIC-8Existing exact/compatible component retained; properties updated.
Component/library replacement limitations
The following exact listed parts could not be replaced with true Flux library components because the exact MPN/C-number was not found in the Flux library, and the instruction forbids automatic substitution:
  • CL10A475KO8NNNC / C19666
  • CL10B224KA8NNNC / C21120
  • TCC1206X5R476K100HT / C5449028
  • APH303015C100MP03 / C42455385
  • RC0603FR-07100KL / C14675
  • PT1206FR-070R68L / C858769
  • LM393DR / C67470
Also noted: GL5528(10-20) exact MPN was found, but the available Flux library part had a different LCSC C-number than the requested C10081, so no part swap was made.
Verification summary
  • Physical BOM component count: 37.
  • Sequential designators applied: C1–C12, D1–D4, J1–J3, L1, R1–R11, RV1, SW1, U1–U4.
  • PCB footprints present: 37 footprints for 37 physical BOM components.
  • PCB stackup: 2 copper layers.
  • PCB routing: autorouter completed after placement/package updates.
  • ERC: no open ERC issues reported in the latest checks.
  • DRC: 3 airwire errors remain. They reference GND fill/stitch/pad connectivity and generic pad labels in the review output. No open overlapping copper or dangling trace warnings were reported after the final routing pass.
Remaining issues
  1. DRC airwire: GND fill/stitch connectivity item 05d59f45.
  2. DRC airwire: GND fill/stitch connectivity item 05d59f45 to a capacitor P2 pad.
  3. DRC airwire: P2-labeled GND pad connectivity between two component pads.
These likely need manual PCB cleanup of the GND fill/stitching and short GND connections, because the targeted manual route attempt created an overlap and was removed before the final autorouting pass.

  • Scope

  • Final component table

  • Component/library replacement limitations

  • Verification summary

  • Remaining issues