# SAP SEED ACCELERATOR ## Description SAP v2: Modular Three-Board Environmental Monitoring & Control System ## Project Details - **Owner:** lordbassama - **Created:** 1/12/2026 - **Last Updated:** 1/12/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD MCB["Main Control Board"] PDB["Power Distribution Board"] RDB["Relay Driver Board"] PDB -->|12V, GND| MCB PDB -->|12V, GND| RDB PDB -->|5V, GND| MCB MCB -->|SPI, I2C, control signals| RDB ``` - **Connectivity:** WiFi - **Domain:** Consumer Electronics - **Manufacturing Quantity Target:** 10 - **Power Requirements:** Battery - **Stars:** 1 ## Key Components ### D2 — [SMBJ12A-13-F](https://www.flux.ai/lcsc/smbj12a-13-f.md) - Diode Type: Zener - Power Rating: 600W - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD - Manufacturer Name: DIODES(美台) - Product Info Url: https://lcsc.com/product-detail/TVS_DIODES_SMBJ12A-13-F_SMBJ12A-13-F_C135038.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Diodes-Incorporated-SMBJ12A-13-F_C135038.pdf - Voltage Rating: 12V - Stand-off Voltage: 12V - Manufacturer Part Number: SMBJ12A-13-F - Role Details: Surge protection for 12V input on PDB - Role: Clamping - Part Type: Protection - LCSC Part Number: C135038 - JLCPCB Part Class: Extended Part - Surge Power Rating: 600W **Pins:** - A [pin 2] - K [pin 1] ### U1 — [IRLML2502TRPBF](https://www.flux.ai/jecstronic/irlml2502trpbf.md) - Role Details: Low-side switching MOSFET for RDB opto-isolated relay driver channels - Manufacturer Name: Infineon Technologies - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Datasheet URL: https://www.infineon.com/dgdl/irlml2502pbf.pdf?fileId=5546d462533600a401535668048e2606 - Role: Switching - Manufacturer Part Number: IRLML2502TRPBF **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U10 — [MP1584EN-LF-P](https://www.flux.ai/monolithicpower/mp1584en-lf-p.md) - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/M/P/MP1584_109_1_3.jpg - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP1584EN-LF-Z - Manufacturer Part Number: MP1584EN-LF-P - Package or Case Code: SOIC8E_MPS_MNP - Manufacturer Name: Monolithic Power Systems - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/109?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Package: SOIC8E_MPS_MNP - Role: Power Conversion - Role Details: 12V to 5V switching buck converter, configured for 5V output at 1A **Pins:** - BST [pin 8] - COMP [pin 3] - EN [pin 2] - EPAD [pin EPAD] - FB [pin 4] - FREQ [pin 6] - GND [pin 5] - SW [pin 1] - VIN [pin 7] ### U2 — [MCP3008-I/SL](https://www.flux.ai/adrian95/mcp3008-isl.md) - Manufacturer Part Number: MCP3008-I/SL - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf - Role Details: SPI ADC for soil sensor inputs - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~CS~/SHDN [pin 10] - AGND [pin 14] - CH0 [pin 1] - CH1 [pin 2] - CH2 [pin 3] - CH3 [pin 4] - CH4 [pin 5] - CH5 [pin 6] - CH6 [pin 7] - CH7 [pin 8] - CLK [pin 13] - DGND [pin 9] - DIN [pin 11] - DOUT [pin 12] - VDD [pin 16] - VREF [pin 15] ### U2 — [MCP3008-I/SL](https://www.flux.ai/adrian95/mcp3008-isl.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Microchip Technology - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf - Role Details: SPI ADC for soil sensor inputs - Manufacturer Part Number: MCP3008-I/SL **Pins:** - ~CS~/SHDN [pin 10] - AGND [pin 14] - CH0 [pin 1] - CH1 [pin 2] - CH2 [pin 3] - CH3 [pin 4] - CH4 [pin 5] - CH5 [pin 6] - CH6 [pin 7] - CH7 [pin 8] - CLK [pin 13] - DGND [pin 9] - DIN [pin 11] - DOUT [pin 12] - VDD [pin 16] - VREF [pin 15] ### U3 — [DHT22](https://www.flux.ai/vasy_skral/dht22.md) - Role Details: Humidity and temperature sensing for Main Control Board - Role: Sensing (Shunt) - Symbol Style: Parametric - Manufacturer Name: Asair - Manufacturer Part Number: DHT22 - Package or Case Code: Module - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Sensor - Datasheet URL: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf **Pins:** - DATA [pin 2] - GND [pin 4] - NULL [pin 3] - VDD [pin 1] ### U4 — [PCA9685PW,118](https://www.flux.ai/lcsc/pca9685pwc118.md) - Role: Switching - JLCPCB Part Class: Extended Part - Package or Case Code: TSSOP-28_L9.7-W4.4-P0.65-LS6.4-TL - Role Details: 16-channel LED PWM driver for LED brightness control - Part Type: LED Drivers - Manufacturer Part Number: PCA9685PW,118 - Manufacturer Name: NXP(恩智浦) - LCSC Part Number: C2678753 **Pins:** - ~{OE} [pin 23] - A0 [pin 1] - A1 [pin 2] - A2 [pin 3] - A3 [pin 4] - A4 [pin 5] - A5 [pin 24] - EXTCLK [pin 25] - LED0 [pin 6] - LED1 [pin 7] - LED10 [pin 17] - LED11 [pin 18] - LED12 [pin 19] - LED13 [pin 20] - LED14 [pin 21] - LED15 [pin 22] - LED2 [pin 8] - LED3 [pin 9] - LED4 [pin 10] - LED5 [pin 11] - LED6 [pin 12] - LED7 [pin 13] - LED8 [pin 15] - LED9 [pin 16] - SCL [pin 26] - SDA [pin 27] - VDD [pin 28] - VSS [pin 14] ### U5 — [TLP281-4](https://www.flux.ai/lcsc/tlp281-4.md) - Manufacturer Name: ISOCOM(英国安数光) - Role Details: Opto-isolated driver for low-side switching of 12V loads (4 channels) - Package or Case Code: SMD-16_L10.3-W4.4-P1.27-LS7.0-BL - Part Type: Optocouplers - Phototransistor Output - Role: Isolation - Product Info Url: https://lcsc.com/product-detail/Optocouplers_Isocom-Components_TLP281-4_Isocom-Components-TLP281-4_C433438.html - Datasheet URL: https://assets.lcsc.com/datasheet/szlcsc/Download-ISO9001-Certification.pdf - JLCPCB Part Class: Extended Part - Package: SMD-16_L10.3-W4.4-P1.27-LS7.0-BL - Manufacturer Part Number: TLP281-4 - LCSC Part Number: C433438 **Pins:** - AN [pin 1] - AN [pin 3] - AN [pin 7] - AN [pin 5] - CAT [pin 2] - CAT [pin 8] - CAT [pin 4] - CAT [pin 6] - COL [pin 14] - COL [pin 16] - COL [pin 12] - COL [pin 10] - EM [pin 15] - EM [pin 9] - EM [pin 11] - EM [pin 13] ### U6 — [IRLML2502TRPBF](https://www.flux.ai/jecstronic/irlml2502trpbf.md) - Datasheet URL: https://www.infineon.com/dgdl/irlml2502pbf.pdf?fileId=5546d462533600a401535668048e2606 - Role: Switching - Role Details: Low-side switching MOSFET for RDB opto-isolated relay driver channels - Manufacturer Part Number: IRLML2502TRPBF - Manufacturer Name: Infineon Technologies - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U7 — [IRLML2502TRPBF](https://www.flux.ai/jecstronic/irlml2502trpbf.md) - Role: Switching - Manufacturer Name: Infineon Technologies - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Part Number: IRLML2502TRPBF - Role Details: Low-side switching MOSFET for RDB opto-isolated relay driver channels - Datasheet URL: https://www.infineon.com/dgdl/irlml2502pbf.pdf?fileId=5546d462533600a401535668048e2606 **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U8 — [IRLML2502TRPBF](https://www.flux.ai/jecstronic/irlml2502trpbf.md) - Manufacturer Part Number: IRLML2502TRPBF - Datasheet URL: https://www.infineon.com/dgdl/irlml2502pbf.pdf?fileId=5546d462533600a401535668048e2606 - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Infineon Technologies - Role Details: Low-side switching MOSFET for RDB opto-isolated relay driver channels - Role: Switching **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U9 — [ESP32-WROOM-32](https://www.flux.ai/vasy_skral/esp32-wroom-32.md) - Manufacturer Part Number: ESP32-WROOM-32 - Manufacturer Name: Espressif Systems - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf - Part Type: Integrated Circuit - Role Details: Wi-Fi bridge between Raspberry Pi and network **Pins:** - EN [pin 3] - GND [pin 15] - 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 32] - RXD0/IO3 [pin 34] - SCK/CLK [pin 20] - SCS/CMD [pin 19] - SDI/SD1 [pin 22] - SDO/SD0 [pin 21] - SENSOR_VN [pin 5] - SENSOR_VP [pin 4] - SHD/SD2 [pin 17] - SWP/SD3 [pin 18] - TXD0/IO1 [pin 35] - VDD [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/lordbassama/sap-seed-accelerator](https://www.flux.ai/lordbassama/sap-seed-accelerator).* --- *Generated from [https://www.flux.ai/lordbassama/sap-seed-accelerator](https://www.flux.ai/lordbassama/sap-seed-accelerator)*