# ESP32-C3 Industrial Controller ## Description Industrial ESP32-C3 controller board with isolated RS-485, protected 12V-24V input, opto-isolated digital inputs, sensor interfaces, and production debug header. ## Project Details - **Owner:** namyoungwoo - **Created:** 4/17/2026 - **Last Updated:** 4/17/2026 - **Visibility:** Public ## Key Components ### D1 — [SMBJ33A-TR](https://www.flux.ai/lcsc/smbj33a-tr.md) - Manufacturer Part Number: SMBJ33A-TR - Role Details: TVS clamp across protected 12V-24V input rail - Manufacturer Name: ST(意法半导体) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-SMBJ33A-TR_C133662.pdf - Product Info Url: https://lcsc.com/product-detail/TVS_STMicroelectronics_SMBJ33A-TR_SMBJ33A-TR_C133662.html - Part Type: TVS - Role: Surge Protection - JLCPCB Part Class: Extended Part - Package: SMB - LCSC Part Number: C133662 - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### D2 — [SS34F](https://www.flux.ai/lcsc/ss34f.md) - Part Type: Schottky Barrier Diodes (SBD) - Package or Case Code: SMA-FL_L3.5-W2.5-LS4.6-L-RD - Role Details: Reverse polarity blocking diode for industrial DC power input - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_SS34F_C110215.html - LCSC Part Number: C110215 - Manufacturer Part Number: SS34F - Role: Reverse Protection - Manufacturer Name: SHIKUES(时科) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Shikues-SS34F_C110215.pdf - Package: SMA-FL - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - C [pin 1] ### IC1 — [ADM2483BRWZ](https://www.flux.ai/vasyl/adm2483brwz.md) - Part Type: Integrated Circuit - Manufacturer Part Number: ADM2483BRWZ - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/adm2483.pdf - Manufacturer Name: Analog Devices Inc. - Role Details: UART to isolated half-duplex RS-485 transceiver with external termination and TVS protection - Role: Isolated RS-485 - Package: SOIC-16W **Pins:** - ~RE [pin 4] - A [pin 12] - B [pin 13] - DE [pin 5] - GND1 [pin 2] - GND1 [pin 8] - GND2 [pin 15] - GND2 [pin 9] - NC [pin 10] - NC [pin 11] - NC [pin 14] - PV [pin 7] - RxD [pin 3] - TxD [pin 6] - VDD1 [pin 1] - VDD2 [pin 16] ### J1 — [B6B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b6b-ph-k-slfsn.md) - Manufacturer Name: JST Sales America Inc. - Role: Debug Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B6B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Part Type: Connector - Role Details: Edge-accessible firmware and UART debug header - Package: JST_PH_2.0_6P - Connector Type: JST PH 2.0 **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### J2 — [B6B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b6b-ph-k-slfsn.md) - Part Type: Connector - Connector Type: JST PH 2.0 - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Part Number: B6B-PH-K-S(LF)(SN) - Role Details: External I2C interface with 3.3V and GND - Package: JST_PH_2.0_6P - Role: I2C Connector - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### J3 — [B6B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b6b-ph-k-slfsn.md) - Role: SPI/GPIO Connector - Connector Type: JST PH 2.0 - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: B6B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Package: JST_PH_2.0_6P - Role Details: External SPI and general digital expansion connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### J4 — [B2B-PH-K-S](https://www.flux.ai/adrian95/b2b-ph-k-s.md) - Package or Case Code: JST_B2B-PH-K-S - Role: Sensor Power Output - License: https://creativecommons.org/licenses/by/4.0/ - Connector Type: JST PH 2.0 - Role Details: 3.3V and GND sensor power output - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST - Package: JST_PH_2.0_2P - Manufacturer Part Number: B2B-PH-K-S - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J5 — [B2B-PH-K-S](https://www.flux.ai/adrian95/b2b-ph-k-s.md) - Connector Type: JST PH 2.0 - Package or Case Code: JST_B2B-PH-K-S - Role: GPIO Analog/Digital Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Secondary GPIO breakout; will be replaced or augmented to expose four GPIO lines - Package: JST_PH_2.0_2P - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST - Manufacturer Part Number: B2B-PH-K-S - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-C3-WROOM-02-N4](https://www.flux.ai/lcsc/esp32-c3-wroom-02-n4.md) - Voltage Supply: 3V ~ 3.6V - Role Details: Main ESP32-C3 controller with edge-mounted PCB antenna and external debug header - JLCPCB Part Class: Extended Part - Package: Module - Package or Case Code: BULETM-SMD_ESPRESSIF_ESP32-C3-WROOM-02-N4-4MB - Operating Temperature: -40°C ~ 85°C (TA) - Manufacturer Name: ESPRESSIF(乐鑫) - LCSC Part Number: C2934560 - Manufacturer Part Number: ESP32-C3-WROOM-02-N4 - Frequency: 2.4GHz - Part Type: RF Transceiver ICs - Role: MCU **Pins:** - 3V3 [pin 1] - EN [pin 2] - EP [pin 19] - GND [pin 9] - IO0 [pin 18] - IO1 [pin 17] - IO10 [pin 10] - IO18 [pin 13] - IO19 [pin 14] - IO2 [pin 16] - IO3 [pin 15] - IO4 [pin 3] - IO5 [pin 4] - IO6 [pin 5] - IO7 [pin 6] - IO8 [pin 7] - IO9 [pin 8] - RXD [pin 11] - TXD [pin 12] ### U2 — [LMR50410YFQDBVRQ1](https://www.flux.ai/lcsc/lmr50410yfqdbvrq1.md) - Manufacturer Name: TI(德州仪器) - Role Details: Primary 3.3V switching regulator for ESP32, logic, and sensor power - LCSC Part Number: C2864746 - Manufacturer Part Number: LMR50410YFQDBVRQ1 - JLCPCB Part Class: Extended Part - Package: SOT-23-6 - Role: Buck Regulator - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR **Pins:** - CB [pin 1] - EN [pin 4] - FB [pin 3] - GND [pin 2] - SW [pin 6] - VIN [pin 5] ### U3 — [PC817X2NSZ9F](https://www.flux.ai/lcsc/pc817x2nsz9f.md) - Role Details: NPN sensor input isolation stage for industrial digital input - Package: DIP-4 - Part Type: Optocouplers - Phototransistor Output - Manufacturer Part Number: PC817X2NSZ9F - Product Info Url: https://lcsc.com/product-detail/DIP-Optocouplers_Sharp-Microelectronics-PC817X2NSZ9F_C390734.html - Role: Opto Isolation - Package or Case Code: DIP-4_L6.4-W4.6-P2.54-LS7.6-BL - Manufacturer Name: SHARP(夏普) - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_1912111437_Sharp-Microelectronics-PC817X2NSZ9F_C390734.pdf - LCSC Part Number: C390734 **Pins:** - Anode [pin 1] - Cathode [pin 2] - Collector [pin 4] - Emitter [pin 3] ### U4 — [PC817X2NSZ9F](https://www.flux.ai/lcsc/pc817x2nsz9f.md) - LCSC Part Number: C390734 - Role Details: NPN sensor input isolation stage for industrial digital input - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_1912111437_Sharp-Microelectronics-PC817X2NSZ9F_C390734.pdf - Package: DIP-4 - Manufacturer Name: SHARP(夏普) - Role: Opto Isolation - Product Info Url: https://lcsc.com/product-detail/DIP-Optocouplers_Sharp-Microelectronics-PC817X2NSZ9F_C390734.html - Package or Case Code: DIP-4_L6.4-W4.6-P2.54-LS7.6-BL - Part Type: Optocouplers - Phototransistor Output - Manufacturer Part Number: PC817X2NSZ9F **Pins:** - Anode [pin 1] - Cathode [pin 2] - Collector [pin 4] - Emitter [pin 3] ### U5 — [KF127-5.08-2P](https://www.flux.ai/lcsc/kf127-5p08-2p.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303171000_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.pdf - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.html - Role Details: Industrial screw terminal for DI or RS-485 field wiring - Role: Field Connector - Package: TerminalBlock_5.08mm - Part Type: Screw terminal - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_P5.08_KF127-5.08-2P - Manufacturer Part Number: KF127-5.08-2P - Manufacturer Name: KEFA(科发) - LCSC Part Number: C474906 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U6 — [KF127-5.08-2P](https://www.flux.ai/lcsc/kf127-5p08-2p.md) - Package or Case Code: CONN-TH_P5.08_KF127-5.08-2P - Manufacturer Part Number: KF127-5.08-2P - Manufacturer Name: KEFA(科发) - LCSC Part Number: C474906 - Package: TerminalBlock_5.08mm - Part Type: Screw terminal - JLCPCB Part Class: Extended Part - Role Details: Industrial screw terminal for DI or RS-485 field wiring - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303171000_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.pdf - Role: Field Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### U7 — [KF127-5.08-2P](https://www.flux.ai/lcsc/kf127-5p08-2p.md) - Manufacturer Part Number: KF127-5.08-2P - Package or Case Code: CONN-TH_P5.08_KF127-5.08-2P - LCSC Part Number: C474906 - Manufacturer Name: KEFA(科发) - JLCPCB Part Class: Extended Part - Package: TerminalBlock_5.08mm - Part Type: Screw terminal - Role: Field Connector - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2303171000_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.pdf - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF127-5-08-2P_C474906.html - Role Details: Industrial screw terminal for DI or RS-485 field wiring **Pins:** - 1 [pin 1] - 2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/namyoungwoo/esp32-c3-industrial-controller](https://www.flux.ai/namyoungwoo/esp32-c3-industrial-controller).* --- *Generated from [https://www.flux.ai/namyoungwoo/esp32-c3-industrial-controller](https://www.flux.ai/namyoungwoo/esp32-c3-industrial-controller)*