# RP2040 Zero 28V Motor Controller ## Description Compact RP2040 Zero motor controller with protected 28 V input, 3.3 V reversible motor H-bridge output, USB programming, active-high trigger input, and 3.5 mm screw terminals. ## Project Details - **Owner:** gabrielvelcota - **Created:** 4/15/2026 - **Last Updated:** 5/18/2026 - **Visibility:** Public - **Copies:** 2 ## Key Components ### D1 — [SMBJ33A-TR](https://www.flux.ai/lcsc/smbj33a-tr~izkk.md) - Role Details: Input surge suppression for 28 V field wiring - Manufacturer Part Number: SMBJ33A-TR - Product Info Url: https://lcsc.com/product-detail/TVS_STMicroelectronics_SMBJ33A-TR_SMBJ33A-TR_C133662.html - Package: SMB - Manufacturer Name: ST(意法半导体) - JLCPCB Part Class: Extended Part - LCSC Part Number: C133662 - Role: TVS Diode - Part Type: TVS - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-SMBJ33A-TR_C133662.pdf - Package or Case Code: SMB_L4.6-W3.6-LS5.3-RD **Pins:** - A [pin 2] - K [pin 1] ### D2 — 1N4148WS-7 - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.mouser.com/datasheet/2/308/1N914BWS-D-1801390.pdf - Manufacturer Name: SMC Diode Solutions - Manufacturer Part Number: 1N4148WS-7 **Pins:** - A [pin 2] - K [pin 1] ### D3 — [B340B-13-F](https://www.flux.ai/adrian95/b340b-13-f~y1g.md) - Voltage Rating: 40V - Manufacturer Name: Diodes - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/844/B320B-B360B_Rev10-2.pdf - Manufacturer Part Number: B340B-13-F - Role Details: 3A 40V Schottky catch diode for LMR14030 buck converter; cathode to SW and anode to GND. Datasheet recommends diode voltage rating 25% above maximum input and current rating near maximum output current. - Current Rating: 3A - Role: Flyback / Freewheeling - Package or Case Code: D_SMB **Pins:** - A [pin 2] - K [pin 1] ### J1 — [DG250-3.5-02P-11-00A(H)](https://www.flux.ai/adrian95/dg250-3p5-02p-11-00ah~77l.md) - Package: THT Terminal Block - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Degson - Part Type: Connector - Role Details: External field wiring connections at 3.5 mm pitch - Datasheet URL: https://www.tme.com/Document/74a50bb60bd70b3c953bc54e89073085/DG250-3.5.pdf - Manufacturer Part Number: DG250-3.5-02P-11-00A(H) - Role: Wiring Terminal **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [DG250-3.5-02P-11-00A(H)](https://www.flux.ai/adrian95/dg250-3p5-02p-11-00ah~77l.md) - Manufacturer Part Number: DG250-3.5-02P-11-00A(H) - Datasheet URL: https://www.tme.com/Document/74a50bb60bd70b3c953bc54e89073085/DG250-3.5.pdf - Role: Wiring Terminal - Package: THT Terminal Block - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Degson - Role Details: External field wiring connections at 3.5 mm pitch - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [DG250-3.5-02P-11-00A(H)](https://www.flux.ai/adrian95/dg250-3p5-02p-11-00ah~77l.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Degson - Part Type: Connector - Datasheet URL: https://www.tme.com/Document/74a50bb60bd70b3c953bc54e89073085/DG250-3.5.pdf - Role Details: External field wiring connections at 3.5 mm pitch - Manufacturer Part Number: DG250-3.5-02P-11-00A(H) - Role: Wiring Terminal - Package: THT Terminal Block **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [QM6015D](https://www.flux.ai/kicad-part-library/qm6015d~3yh.md) - Role Details: -60 V P-channel MOSFET replacing AO3401A to protect against reversed 28 V input polarity with improved voltage margin - Role: Protection MOSFET - Package or Case Code: TO-252-2 - Manufacturer Part Number: QM6015D - Datasheet URL: http://www.jaolen.com/images/pdf/QM6015D.pdf **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### U1 — [RP2040-ZERO](https://www.flux.ai/baronunread/rp2040-zero-ah3u2~8c.md) - Package or Case Code: MODULE_RP2040-ZERO - Manufacturer Part Number: RP2040-ZERO - Role Details: Main control module with onboard USB connector for programming - Role: MCU - Part Type: RP2040-ZERO - Manufacturer Name: Raspberry Pi - Package: Module **Pins:** - 3V3 [pin 21] - 5V [pin 23] - GND [pin 22] - GP0 [pin 1] - GP1 [pin 2] - GP10 [pin 11] - GP11 [pin 12] - GP12 [pin 13] - GP13 [pin 14] - GP14 [pin 15] - GP15 [pin 16] - GP2 [pin 3] - GP26 [pin 17] - GP27 [pin 18] - GP28 [pin 19] - GP29 [pin 20] - GP3 [pin 4] - GP4 [pin 5] - GP5 [pin 6] - GP6 [pin 7] - GP7 [pin 8] - GP8 [pin 9] - GP9 [pin 10] ### U2 — [LMR14030SDDAR](https://www.flux.ai/lcsc/lmr14030sddar~y5m4.md) - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: LMR14030SDDAR - Power Consumption: Low - Integrated Circuit Type: DC-DC Buck Converter - Operating Voltage: 4.5V to 40V - Frequency: 1.5MHz - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_Texas-Instruments_LMR14030SDDAR_Texas-Instruments-TI-LMR14030SDDAR_C182078.html - Package or Case Code: SO-8_L4.9-W3.9-P1.27-LS6.0-BL-EP - LCSC Part Number: C182078 - Role: Buck Regulator - Logic Function: Regulator - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010331_Texas-Instruments-LMR14030SDDAR_C182078.pdf - JLCPCB Part Class: Extended Part - Role Details: 28 V to 5 V conversion for RP2040 Zero VSYS and logic supply - Package: SO-8 - Part Type: DC-DC Converters **Pins:** - BOOT [pin 1] - EN [pin 3] - EPAD [pin 9] - FB [pin 5] - GND [pin 7] - RT/SYNC [pin 4] - SS [pin 6] - SW [pin 8] - VIN [pin 2] ### U3 — [MP6513GJ-Z](https://www.flux.ai/monolithicpower/mp6513gj-z~0xn.md) - Package: TSOT-23-6 - Role Details: Bidirectional H-bridge with two logic inputs from RP2040 Zero - Manufacturer Name: Monolithic Power Systems - Manufacturer Part Number: MP6513GJ-Z - Package or Case Code: TSOT23-6_MP6513_MNP - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP6513GJ-Z - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/M/P/MP6513_93_1.jpg - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/93?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Role: Motor Driver **Pins:** - GND [pin 2] - IN1 [pin 1] - IN2 [pin 3] - OUT1 [pin 6] - OUT2 [pin 4] - VCC [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/gabrielvelcota/rp2040-zero-28v-motor-controller~88](https://www.flux.ai/gabrielvelcota/rp2040-zero-28v-motor-controller~88).* --- *Generated from [https://www.flux.ai/gabrielvelcota/rp2040-zero-28v-motor-controller~88](https://www.flux.ai/gabrielvelcota/rp2040-zero-28v-motor-controller~88)*