Servodrive — board A, motor board
About the Servodrive — board A, motor board
Servodrive — board A, motor board is an open source RP2040/RP2350 PCB design by sequoia-hope, published on GitHub. It is a 6-layer board measuring 65 × 65 mm, with 132 components from 47 distinct parts.
Its main chip is the RP2350A, from the RP2040/RP2350 family. Other key parts include the EG2103, INA241A3, W25Q16JVUXIQ, SPX3819-3.3 and MT6701. By type, the board carries 47 capacitors, 46 resistors, 10 ICs, 6 transistors, 6 connectors and 6 diodes.
It belongs with the robotics & motion designs in this gallery.
From the project
A simpler brushless motor driver
A round, motor-mounted servodrive: two Ø65 mm boards stacked on the back of a brushless motor, with a magnetic rotary encoder on the shaft axis.
Status: board A captured, placed and routed. 136 parts, 87 nets, 425 pin connections, every one of them made. DRC- and ERC-clean, and KiCad's own extracted netlist matches the intended one connection for connection. Re-routed 2026-09-22 with four of the simulation's changes (below); board B is still an outline. Board S, the single-board variant, captured, placed and routed 2026-09-23 from the same generators, re-routed the same day with TI's buck…
Main components on the Servodrive — board A, motor board
Servodrive — board A, motor board bill of materials (BOM)
132 components, 47 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | EG2103 | SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U3 |
| 3 | INA241A3 | TSOT-23-8 | U4, U5, U6 |
| 1 | RP2350A | RP2350-QFN-60-1EP_7x7_P0.4mm_EP3.4x3.4mm_ThermalVias | U7 |
| 1 | W25Q16JVUXIQ | Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm | U8 |
| 1 | SPX3819-3.3 | SOT-23-5 | U9 |
| 1 | MT6701 | SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 3 | BSC030N08NS5 | TDSON-8-1_ThermalVias_HS | Q1, Q3, Q5 |
| 3 | BSC030N08NS5 | TDSON-8-1_ThermalVias | Q2, Q4, Q6 |
| 1 | 12MHz | Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
| 3 | PhasePad_Arc | PhasePad_Arc | J1, J2, J3 |
| 2 | PWR_LINK | PinHeader_2x05_P2.54mm_Vertical | J7, J8 |
| 1 | SIG_LINK | PinHeader_2x14_P1.27mm_Vertical_SMD | J9 |
| 6 | ThermalBoss_M2.5 | ThermalBoss_M2.5 | H10, H11, H12, H13, H14, H15 |
| 3 | ThermalLand_Phase | ThermalLand_Phase | TL1, TL2, TL3 |
| 3 | 100V fast | D_SOD-323 | D101, D201, D301 |
| 3 | TPSMF4L64A | D_SOD-123F | D102, D202, D302 |
| 1 | 3u3 | L_pol_2016 | L701 |
| 6 | 2.2u/100V | C_1206_3216Metric | C101, C102, C201, C202, C301, C302 |
| 6 | 100n/100V | C_0603_1608Metric | C103, C104, C203, C204, C303, C304 |
| 3 | 1u/25V | C_0603_1608Metric | C105, C205, C305 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | 100n | C_0603_1608Metric | C106, C206, C306, C801, C802 |
| 3 | 1n | C_0603_1608Metric | C108, C208, C308 |
| 3 | 470p/100V C0G | C_0603_1608Metric | C109, C209, C309 |
| 1 | 4u7/25V | C_0603_1608Metric | C603 |
| 1 | 4u7 | C_0603_1608Metric | C604 |
| 10 | 100n | C_0402_1005Metric | C701, C702, C703, C704, C705, C706, C707, C711 +2 |
| 2 | 27p | C_0402_1005Metric | C709, C710 |
| 2 | 1u | C_0603_1608Metric | C712, C713 |
| 2 | 4u7 | C_0402_1005Metric_small_pads | C714, C715 |
| 1 | 1u | C_0402_1005Metric | C716 |
| 2 | 4u7 | C_0402_1005Metric | C718, C719 |
| 6 | 2R2 | R_0402_1005Metric | R101, R102, R201, R202, R301, R302 |
| 4 | 2m0 | R_2010_5025Metric | R105, R106, R205, R206 |
| 6 | 10R | R_0603_1608Metric | R107, R108, R207, R208, R307, R308 |
| 6 | 10k | R_0603_1608Metric | R109, R110, R209, R210, R309, R310 |
| 6 | 4k7 | R_0402_1005Metric | R111, R112, R211, R212, R311, R312 |
| 3 | 2R2 | R_0603_1608Metric | R113, R213, R313 |
| 2 | 0R | R_2010_5025Metric | R305, R306 |
| 2 | 1k | R_0402_1005Metric | R701, R702 |
| 1 | 10R | R_0402_1005Metric | R703 |
| 2 | 10k | R_0402_1005Metric | R704, R705 |
| 1 | 33R | R_0402_1005Metric | R706 |
| 2 | 27R | R_0402_1005Metric | R707, R708 |
| 2 | 56k 0.1% | R_0603_1608Metric | R801, R806 |
| 1 | 4k7 0.1% | R_0603_1608Metric | R802 |
| 1 | 10k 0.1% | R_0603_1608Metric | R803 |
| 1 | 10k NTC | R_0603_1608Metric | R901 |
Servodrive — board A, motor board design files
The KiCad project lives in the sequoia-hope/servodrive repository on GitHub; these links point at the commit this page was built from.
Servodrive — board A, motor board: common questions
What microcontroller does the Servodrive — board A, motor board use?
The Servodrive — board A, motor board is built around the RP2350A, from the RP2040/RP2350 family.
How big is the Servodrive — board A, motor board?
The Servodrive — board A, motor board measures 65 × 65 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the Servodrive — board A, motor board?
132 components, from 47 distinct parts. The full bill of materials is listed on this page.
Where can I download the Servodrive — board A, motor board design files?
From the sequoia-hope/servodrive repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Servodrive — board A, motor board design in my own project?
The repository has no license, so all rights stay with sequoia-hope. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Servodrive — board A, motor board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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