# Nively Valve Block BLE Controller ## Description Compact 2-layer BLE pneumatic valve controller for a 12V campervan leveling valve block with two low-side solenoid drivers. ## Project Details - **Owner:** chrisla - **Created:** 6/13/2026 - **Last Updated:** 6/13/2026 - **Visibility:** Public - **Domain:** IoT - **Connectivity:** BLE - **Operating Voltage:** 12V - **Implementation Details:** 2-layer 50x40mm PCB, 12V input, 3.3V buck, ESP32-C3-MINI-1, dual 2A low-side solenoid drivers - **Power Requirements:** Battery ## Key Components ### D1 — [SMBJ16A](https://www.flux.ai/lcsc/smbj16a~fiqh.md) - Product Info Url: https://lcsc.com/product-detail/Others_SEMIWARE-SMBJ16A_C294870.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_SEMIWARE-SMBJ16A_C294870.pdf - Manufacturer Part Number: SMBJ16A - Manufacturer Name: SEMIWARE(赛米微尔) - LCSC Part Number: C294870 - Part Type: TVS - Role: 12V TVS clamp - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### D2 — [SS34](https://www.flux.ai/lcsc/ss34~6q67.md) - Role: Valve flyback diode - Forward Voltage: 0.3V to 0.45V - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD - Datasheet URL: https://www.lcsc.com/datasheet/C2758511.pdf - Manufacturer Part Number: SS34 - LCSC Part Number: C2758511 - Manufacturer Name: UMW(友台半导体) - Reverse Voltage: 40V - Part Type: Schottky Barrier Diodes (SBD) - Diode Type: Schottky **Pins:** - A [pin 2] - K [pin 1] ### D3 — [SS34](https://www.flux.ai/lcsc/ss34~6q67.md) - JLCPCB Part Class: Extended Part - Package or Case Code: SMB_L4.3-W3.6-LS5.4-RD - Forward Voltage: 0.3V to 0.45V - LCSC Part Number: C2758511 - Manufacturer Part Number: SS34 - Datasheet URL: https://www.lcsc.com/datasheet/C2758511.pdf - Manufacturer Name: UMW(友台半导体) - Reverse Voltage: 40V - Part Type: Schottky Barrier Diodes (SBD) - Diode Type: Schottky - Role: Valve flyback diode **Pins:** - A [pin 2] - K [pin 1] ### F1 — [3-103-103](https://www.flux.ai/lcsc/3-103-103~7gd.md) - JLCPCB Part Class: Extended Part - Part Type: Automotive Fuses - Manufacturer Part Number: 3-103-103 - Role: 3A input fuse - Role Details: 12V input path sized for both valves on simultaneously; design target 3A fuse/path - LCSC Part Number: C1972626 - Manufacturer Name: SCHURTER - Package or Case Code: FUSE-SMD_L6.1-W2.6 **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [TYPE-C-2.0-16PIN-SMT-3-OR](https://www.flux.ai/lcsc/type-c-2p0-16pin-smt-3-or~957d.md) - Manufacturer Part Number: TYPE-C-2.0-16PIN-SMT-3-OR - Manufacturer Name: CIKI(皓富) - Part Type: USB Connectors - Role: USB-C programming connector - JLCPCB Part Class: Extended Part - Package or Case Code: USB-SMD_TYPE-C16PIN-1 - LCSC Part Number: C2987387 **Pins:** - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - VBUS [pin A4B9] - VBUS [pin B4A9] ### J2 — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1757242 - Connector Pitch: 5.08mm - Connector Positions: 2 - Manufacturer Name: Phoenix Contact - Role: 12V input terminal - Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J3 — [DB125-3.81-4P-GN-S](https://www.flux.ai/jharwinbarrozo/db125-3p81-4p-gn-s~l9d.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: DB125-3.81-4P-GN-S - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304061030_DORABO-DB125-3-81-4P-GN-S_C395880.pdf - Connector Pitch: 3.81mm - Manufacturer Name: DIBO - Role: Dual valve output terminal - Connector Positions: 4 **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] - P4 [pin 4] ### LED1 — [SML-D13FWT86C](https://www.flux.ai/cherepanyadima/sml-d13fwt86c.md) - Part Type: Optoelectronic Devices - Datasheet URL: https://www.snapeda.com/parts/SML-D13FWT86C/Rohm%20Semiconductor/datasheet/ - Manufacturer Name: Rohm Semiconductor - Role: Indicator LED - Manufacturer Part Number: SML-D13FWT86C **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [AO3401A](https://www.flux.ai/jecstronic/ao3401a~9r5.md) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2007171935_HUASHUO-AO3401A_C700954.pdf - Role: Reverse polarity protection PMOS - Manufacturer Part Number: AO3401A - Manufacturer Name: HUASHUO - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AO3400A - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: Sized for 2A continuous design target per valve with low Rds(on) at logic gate drive - Role: Low-side valve MOSFET - Part Type: Transistor - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q3 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Role: Low-side valve MOSFET - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Part Type: Transistor - Manufacturer Name: Alpha & Omega Semiconductor Inc. - Role Details: Sized for 2A continuous design target per valve with low Rds(on) at logic gate drive - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AO3400A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SW1 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Role: Momentary pushbutton - Manufacturer Part Number: TS-1088-AR02016 - LCSC Part Number: C720477 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - JLCPCB Part Class: Extended Part - Part Type: Tactile Switches - Manufacturer Name: XUNPU(讯普) - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Part Type: Tactile Switches - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Manufacturer Name: XUNPU(讯普) - LCSC Part Number: C720477 - Role: Momentary pushbutton - Manufacturer Part Number: TS-1088-AR02016 **Pins:** - 1 [pin 1] - 2 [pin 2] ### U1 — [ESP32-C3-MINI-1-N4(4MB)](https://www.flux.ai/lcsc/esp32-c3-mini-1-n44mb~ws8.md) - Package or Case Code: WIFIM-SMD_ESP32-C3-MINI-1 - Role: BLE MCU module - Part Type: WIFI Modules - Manufacturer Part Number: ESP32-C3-MINI-1-N4(4MB) - LCSC Part Number: C2934561 - JLCPCB Part Class: Extended Part - Manufacturer Name: ESPRESSIF(乐鑫) **Pins:** - 3V3 [pin 3] - EN [pin 8] - GND [pin 43] - GND [pin 52] - GND [pin 44] - GND [pin 39] - GND [pin 41] - GND [pin 49] - GND [pin 14] - GND [pin 48] - GND [pin 40] - GND [pin 51] - GND [pin 1] - GND [pin 36] - GND [pin 50] - GND [pin 53] - GND [pin 45] - GND [pin 37] - GND [pin 38] - GND [pin 47] - GND [pin 2] - GND [pin 42] - GND [pin 46] - GND [pin 11] - IO1 [pin 13] - IO10 [pin 16] - IO18 [pin 26] - IO19 [pin 27] - IO2 [pin 5] - IO3 [pin 6] - IO4 [pin 18] - IO5 [pin 19] - IO6 [pin 20] - IO7 [pin 21] - IO8 [pin 22] - IO9 [pin 23] - NC [pin 28] - NC [pin 32] - NC [pin 9] - NC [pin 17] - NC [pin 4] - NC [pin 7] - NC [pin 35] - NC [pin 25] - NC [pin 24] - NC [pin 15] - NC [pin 33] - NC [pin 10] - NC [pin 29] - NC [pin 34] - O0 [pin 12] - RXD0 [pin 30] - TXD0 [pin 31] ### U2 — [AP63203WU-7](https://www.flux.ai/lcsc/ap63203wu-7~j9cl.md) - Role Details: 2A fixed 3.3V buck; input current budget includes ESP32 and LEDs; AP63203 datasheet recommends 10uF input, 3.9uH, 2x22uF output, 100nF BST-SW - Manufacturer Name: DIODES(美台) - Operating Voltage: 4.5V to 60V - Part Type: AC-DC Controllers & Regulators - Frequency: 1100kHz - LCSC Part Number: C780769 - Output Current: 2A - Manufacturer Part Number: AP63203WU-7 - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP63200-AP63201-AP63203-AP63205.pdf - Operating Temperature: -40 ~ +85℃ - IC Type: Synchronous Buck Converter - Max Input Voltage: 3.8~32V - JLCPCB Part Class: Extended Part - Max Output Voltage: 3.3V - Package or Case Code: TSOT-26_L2.9-W1.6-P0.95-LS2.8-BL - Symbol Style: parametric-v1 - Role: 3.3V buck regulator **Pins:** - BST [pin 6] - EN [pin 2] - FB [pin 1] - GND [pin 4] - SW [pin 5] - VIN [pin 3] ### U3 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Manufacturer Name: UMW(友台半导体) - Peak Pulse Current: 5A - Manufacturer Part Number: USBLC6-2SC6 - Breakdown Voltage: 6V - JLCPCB Part Class: Extended Part - Maximum Clamping Voltage: 17V - LCSC Part Number: C2687116 - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Operating Temperature: -55°C ~ 125°C (TJ) - Symbol Style: parametric-v1 - Part Type: ESD Protection Devices - Role: USB ESD protection - Power: 150W **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/chrisla/nively-valve-block-ble-controller~vm](https://www.flux.ai/chrisla/nively-valve-block-ble-controller~vm).* --- *Generated from [https://www.flux.ai/chrisla/nively-valve-block-ble-controller~vm](https://www.flux.ai/chrisla/nively-valve-block-ble-controller~vm)*