# ESP32 HX711 Load Cell Board Rev A ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** rafalezamano - **Created:** 4/7/2026 - **Last Updated:** 4/8/2026 - **Visibility:** Public - **Stars:** 1 - **Copies:** 1 ## Key Components ### D1 — [SML-LX0805GC-TR](https://www.flux.ai/adrian95/sml-lx0805gc-tr~vu5.md) - Role Details: Closest available library substitute for side-emitting LED - Manufacturer Part Number: SML-LX0805GC-TR - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED - Package: 0805 - Datasheet URL: https://www.lumex.com/spec/SML-LX0805GC-TR.pdf - Manufacturer Name: Lumex Opto/Components Inc. - Role: Indicator LED **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SML-LX0805GC-TR](https://www.flux.ai/adrian95/sml-lx0805gc-tr~vu5.md) - Manufacturer Name: Lumex Opto/Components Inc. - Datasheet URL: https://www.lumex.com/spec/SML-LX0805GC-TR.pdf - Role: Indicator LED - Package: 0805 - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Closest available library substitute for side-emitting LED - Manufacturer Part Number: SML-LX0805GC-TR **Pins:** - A [pin 2] - K [pin 1] ### J1 — [CX90M-16P](https://www.flux.ai/jecstronic/cx90m-16p~ewh.md) - Part Type: Connector - Role Details: USB Type-C receptacle for 5V input - Package: USB-C Mid-Mount - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hirose Electric Co Ltd - Manufacturer Part Number: CX90M-16P - Datasheet URL: https://www.mouser.com/datasheet/2/185/CX90M_16P_CL0480_0513_0_00_2DDrawing_D174082_en-1610999.pdf - Role: USB-C Connector **Pins:** - CC1 [pin A5] - CC2 [pin B5] - D- [pin A7] - D- [pin B7] - D+ [pin A6] - D+ [pin B6] - GND [pin B1] - GND [pin B12] - GND [pin A1] - GND [pin A12] - MID1 [pin MID1] - MID2 [pin MID2] - SBU1 [pin A8] - SBU2 [pin B8] - VBUS [pin A4] - VBUS [pin B9] - VBUS [pin A9] - VBUS [pin B4] ### J2 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J3 — [B4B-PH-SM4-TBT(LF)(SN)](https://www.flux.ai/adrian95/b4b-ph-sm4-tbtlfsn~rvt.md) - Manufacturer Part Number: B4B-PH-SM4-TBT(LF)(SN) - Package: JST-PH 4 - Part Type: Connector - Role: Sensor Connector - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 4-pin load-cell connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### SW1 — [TL3330AF260QG](https://www.flux.ai/vasy_skral/tl3330af260qg~g8.md) - Role Details: Board-edge side-access tactile switch - Role: Button - Manufacturer Name: E-Switch - Package: Side-actuated SMD - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/163/TL3330.pdf - Manufacturer Part Number: TL3330AF260QG - Part Type: Switch **Pins:** - P1 [pin 1] - P2 [pin 2] ### SW2 — [TL3330AF260QG](https://www.flux.ai/vasy_skral/tl3330af260qg~g8.md) - Role Details: Board-edge side-access tactile switch - Package: Side-actuated SMD - Manufacturer Name: E-Switch - Role: Button - Datasheet URL: https://sten-eswitch-13110800-production.s3.amazonaws.com/system/asset/product_line/data_sheet/163/TL3330.pdf - Manufacturer Part Number: TL3330AF260QG - Part Type: Switch **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [ESP32-WROOM-32E](https://www.flux.ai/vasy_skral/esp32-wroom-32e~7ed.md) - Part Type: Integrated Circuit - Manufacturer Part Number: ESP32-WROOM-32E - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Espressif Systems - Role Details: ESP32 WiFi/BLE module with integrated PCB antenna - Package: Module - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf - Role: MCU **Pins:** - GND=> . [pin 15] - EN [pin 3] - GND [pin 39] - GND [pin 38] - GND [pin 1] - IO0 [pin 25] - IO12 [pin 14] - IO13 [pin 16] - IO14 [pin 13] - IO15 [pin 23] - IO16 [pin 27] - IO17 [pin 28] - IO18 [pin 30] - IO19 [pin 31] - IO2 [pin 24] - IO21 [pin 33] - IO22 [pin 36] - IO23 [pin 37] - IO25 [pin 10] - IO26 [pin 11] - IO27 [pin 12] - IO32 [pin 8] - IO33 [pin 9] - IO34 [pin 6] - IO35 [pin 7] - IO4 [pin 26] - IO5 [pin 29] - NC [pin 17] - NC [pin 21] - NC [pin 20] - NC [pin 32] - NC [pin 18] - NC [pin 19] - NC [pin 22] - RXD0/IO3 [pin 34] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - TXD0/IO1 [pin 35] - VDD [pin 2] ### U2 — [HX711](https://www.flux.ai/kicad-part-library/hx711~na6.md) - Package or Case Code: SOP-16_3.9x9.9mm_P1.27mm - Role Details: Load-cell bridge amplifier and ADC - Role: ADC - Manufacturer Part Number: HX711 - Package: SOP-16 - Datasheet URL: https://web.archive.org/web/20220615044707/https://akizukidenshi.com/download/ds/avia/hx711.pdf **Pins:** - AGND [pin 5] - AVDD [pin 3] - BASE [pin 2] - DOUT [pin 12] - DVDD [pin 16] - INA- [pin 7] - INA+ [pin 8] - INB- [pin 9] - INB+ [pin 10] - PD_SCK [pin 11] - RATE [pin 15] - VBG [pin 6] - VFB [pin 4] - VSUP [pin 1] - XI [pin 14] - XO [pin 13] ### U3 — [AMS1117-3.3](https://www.flux.ai/cherepanyadima/ams1117-3p3~k0.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Symbol Style: Parametric - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf - Role Details: Fixed 3.3V LDO regulator - Role: Regulator - Package: SOT-223 - Manufacturer Name: AMS - Manufacturer Part Number: AMS1117-3.3 **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U4 — [TP4056](https://www.flux.ai/vasy_skral/tp4056~xa.md) - Package: SOP-8 - Manufacturer Name: NanJing Top Power ASIC Corp. - Manufacturer Part Number: TP4056 - Role Details: USB-powered single-cell Li-ion charging IC - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Datasheet URL: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf - Role: Battery Charger **Pins:** - ~CHRG [pin 7] - ~STDBY [pin 6] - BAT [pin 5] - CE [pin 8] - EP [pin 9] - GND [pin 3] - PROG [pin 2] - TEMP [pin 1] - VCC [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/rafalezamano/esp32-hx711-load-cell-board-rev-a~lw](https://www.flux.ai/rafalezamano/esp32-hx711-load-cell-board-rev-a~lw).* --- *Generated from [https://www.flux.ai/rafalezamano/esp32-hx711-load-cell-board-rev-a~lw](https://www.flux.ai/rafalezamano/esp32-hx711-load-cell-board-rev-a~lw)*