# Design Review Report: Files Tab Demo Project ## Description ESP32-based controller for an external RS-485 ultrasonic water flow sensor, powered from USB-C with onboard 3.3 V logic supply and boosted 12 V sensor supply. ## Project Details - **Owner:** flux - **Created:** 4/16/2026 - **Last Updated:** 4/16/2026 - **Visibility:** Public - **Sensor:** https://www.alibaba.com/product-detail/T-Measurement-Digital-RS485-Ultrasonic-Water_1601375143777.html ## Key Components ### D1 — [SMBJ5.0A](https://www.flux.ai/adrian95/smbj5p0a.md) - Manufacturer Part Number: SMBJ5.0A - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Littelfuse Inc. - Part Type: Diode - Datasheet URL: https://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf **Pins:** - A [pin 2] - K [pin 1] ### D2 — [LED_0603_1608Metric](https://www.flux.ai/adrian95/led06031608metric.md) - Color: Red - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008201032_Foshan-NationStar-Optoelectronics-NCD0603R1_C84263.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Current: 20mA - Forward Voltage: 2.0V - Manufacturer Name: Foshan NationStar Optoelectronics - Part Type: LED - Manufacturer Part Number: NCD0603R1 **Pins:** - P1 [pin 1] - P2 [pin 2] ### D3 — [1N5819HW-7-F](https://www.flux.ai/jecstronic/1n5819hw-7-f.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - Manufacturer Name: Diodes Incorporated - Part Type: Diode - Manufacturer Part Number: 1N5819HW-7-F **Pins:** - A [pin 2] - K [pin 1] ### D4 — [SS34](https://www.flux.ai/jecstronic/ss34.md) - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SS34 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/ss39-d.pdf - Manufacturer Name: onsemi **Pins:** - A [pin 2] - K [pin 1] ### D5 — [SM712-02HTG](https://www.flux.ai/lcsc/sm712-02htg.md) - Manufacturer Name: TECH PUBLIC(台舟) - Breakdown Voltage: 8 ~ 13.3V - Reverse Leakage Current: 1uA - Manufacturer Part Number: SM712-02HTG - LCSC Part Number: C2827658 - Package or Case Code: SOT-23_L2.9-W1.3-P1.90-LS2.4-BR - Peak Pulse Power Dissipation: 500W - Maximum Clamping Voltage: 26V - Part Type: ESD Protection Devices - Diode Type: ESD - Peak Pulse Current: 20A - Reverse Voltage: 7 ~ 12V - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### D6 — [LED_0603_1608Metric](https://www.flux.ai/adrian95/led06031608metric.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008201032_Foshan-NationStar-Optoelectronics-NCD0603C1_C84264.pdf - Manufacturer Part Number: NCD0603C1 - Color: Green - License: https://creativecommons.org/licenses/by/4.0/ - Forward Current: 20mA - Part Type: LED - Manufacturer Name: Foshan NationStar Optoelectronics - Forward Voltage: 2.0V **Pins:** - P1 [pin 1] - P2 [pin 2] ### D7 — [LED_0603_1608Metric](https://www.flux.ai/adrian95/led06031608metric.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/2008201032_Foshan-NationStar-Optoelectronics-NCD0603C1_C84264.pdf - Manufacturer Part Number: NCD0603C1 - Color: Green - License: https://creativecommons.org/licenses/by/4.0/ - Forward Current: 20mA - Part Type: LED - Forward Voltage: 2.0V - Manufacturer Name: Foshan NationStar Optoelectronics **Pins:** - P1 [pin 1] - P2 [pin 2] ### F1 — [0ZCJ0050FF2G](https://www.flux.ai/adrian95/0zcj0050ff2g.md) - Manufacturer Part Number: 0ZCJ0050FF2G - Part Type: Fuse - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.belfuse.com/resources/datasheets/circuitprotection/ds-cp-0zcj-series.pdf - Manufacturer Name: Bel Fuse Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### IC1 — [ESP32-S3-WROOM-1-N16R8](https://www.flux.ai/adrian95/esp32-s3-wroom-1-n16r8.md) - Manufacturer Name: Espressif Systems - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_wroom_1_wroom_1u_datasheet_en-2930317.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module - Manufacturer Part Number: ESP32-S3-WROOM-1-N16R8 **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND_1 [pin 1] - GND_10 [pin 48] - GND_11 [pin 49] - GND_2 [pin 40] - GND_3 [pin 41] - GND_4 [pin 42] - GND_5 [pin 43] - GND_6 [pin 44] - GND_7 [pin 45] - GND_8 [pin 46] - GND_9 [pin 47] - IO0 [pin 27] - IO1 [pin 39] - IO10 [pin 18] - IO11 [pin 19] - IO12 [pin 20] - IO13 [pin 21] - IO14 [pin 22] - IO15 [pin 8] - IO16 [pin 9] - IO17 [pin 10] - IO18 [pin 11] - IO19 [pin 13] - IO2 [pin 38] - IO20 [pin 14] - IO21 [pin 23] - IO3 [pin 15] - IO35 [pin 28] - IO36 [pin 29] - IO37 [pin 30] - IO38 [pin 31] - IO39 [pin 32] - IO4 [pin 4] - IO40 [pin 33] - IO41 [pin 34] - IO42 [pin 35] - IO45 [pin 26] - IO46 [pin 16] - IO47 [pin 24] - IO48 [pin 25] - IO5 [pin 5] - IO6 [pin 6] - IO7 [pin 7] - IO8 [pin 12] - IO9 [pin 17] - RXD0 [pin 36] - TXD0 [pin 37] ### IC2 — [TPS62162DSGT](https://www.flux.ai/vasyl/tps62162dsgt.md) - Manufacturer Part Number: TPS62162DSGT - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Ftps62161 **Pins:** - AGND [pin 4] - EN [pin 3] - FB [pin 5] - PAD [pin 9] - PG [pin 8] - PGND [pin 1] - SW [pin 7] - VIN [pin 2] - VOS [pin 6] ### IC3 — [MT3608](https://www.flux.ai/vasyl/mt3608.md) - Manufacturer Part Number: MT3608L - Manufacturer Name: Aerosemi Technology Co Ltd - Datasheet URL: https://datasheet.lcsc.com/lcsc/2201121530_XI-AN-Aerosemi-Tech-MT3608L_C2932326.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 4] - FB [pin 3] - GND [pin 2] - IN [pin 5] - NC [pin 6] - SW [pin 1] ### J1 — [USB-C 2.0 Receptacle](https://www.flux.ai/vritzka/usb-c-2p0-receptacle.md) - Part Type: USB C - Manufacturer Part Number: USB4105-GF-A - Datasheet URL: https://gct.co/files/drawings/usb4105.pdf - Purchase Url: https://www.digikey.com/en/products/detail/gct/USB4105-GF-A/11198441 - Manufacturer Name: GTC **Pins:** - CC1 [pin 6] - CC2 [pin 12] - D- [pin 7] - D- [pin 9] - D+ [pin 10] - D+ [pin 8] - GND [pin 1] - GND [pin 16] - GND [pin 15] - GND [pin 2] - SBU1 [pin 11] - SBU2 [pin 5] - Shield [pin 16] - VBUS [pin 3] - VBUS [pin 14] - VBUS [pin 4] - VBUS [pin 13] ### J2 — [Pin Header 01x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x04-254mm-vertical.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### SW1 — [Tactile Switch SPST-NO PTS526 SK15 SMTR2 LFS](https://www.flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs.md) - Manufacturer Name: C&K - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2780/pts526.pdf - Manufacturer Part Number: PTS526 SK15 SMTR2 LFS **Pins:** - 4 [pin 4] - 2 [pin 2] - 1 [pin 1] - 3 [pin 3] ### SW2 — [Tactile Switch SPST-NO PTS526 SK15 SMTR2 LFS](https://www.flux.ai/collinsemasi/tactile-switch-spst-no-pts526-sk15-smtr2-lfs.md) - Manufacturer Part Number: PTS526 SK15 SMTR2 LFS - Datasheet URL: https://www.ckswitches.com/media/2780/pts526.pdf - Manufacturer Name: C&K - Part Type: Switch **Pins:** - 4 [pin 4] - 2 [pin 2] - 1 [pin 1] - 3 [pin 3] ### U3 — [USBLC6-2P6](https://www.flux.ai/kicad-part-library/usblc6-2p6.md) - Package or Case Code: SOT-666 - Datasheet URL: https://www.st.com/resource/en/datasheet/usblc6-2.pdf - Manufacturer Part Number: USBLC6-2P6 - Manufacturer Name: Texas Instruments Inc. **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### U4 — [THVD1450DR](https://www.flux.ai/lcsc/thvd1450dr.md) - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Datasheet URL: https://www.ti.com/lit/ds/symlink/thvd1450.pdf?ts=1775817922086&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTHVD1450%252Fpart-details%252FTHVD1450DR - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) - Symbol Style: Parametric - Part Type: RS-485/RS-422 ICs - LCSC Part Number: C2671361 - Manufacturer Part Number: THVD1450DR **Pins:** - ~{RE} [pin 2] - A [pin 6] - B [pin 7] - D [pin 4] - DE [pin 3] - GND [pin 5] - R [pin 1] - VCC [pin 8] ### U6 — [KF128-2.54-4P](https://www.flux.ai/lcsc/kf128-2p54-4p.md) - Package or Case Code: CONN-TH_4P-P2.54_KF128-2.54-4P - Manufacturer Name: KEFA(科发) - LCSC Part Number: C474922 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303171000_Cixi-Kefa-Elec-KF128-2-54-4P_C474922.pdf - Part Type: Screw terminal - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-2-54-4P_C474922.html - Manufacturer Part Number: KF128-2.54-4P **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/flux/design-review-report-files-tab-demo-project](https://www.flux.ai/flux/design-review-report-files-tab-demo-project).* --- *Generated from [https://www.flux.ai/flux/design-review-report-files-tab-demo-project](https://www.flux.ai/flux/design-review-report-files-tab-demo-project)*