Mainboard
About the Mainboard PCB
Mainboard is an open source RP2040/RP2350 PCB design by luhbots, published on GitHub. It is a 4-layer board measuring 96 × 60 mm, with 175 components from 72 distinct parts.
Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AP1117-33, MCP6L01x-xOT, AP63205WU, AP64500 and SKY66112. By type, the board carries 62 capacitors, 53 resistors, 15 connectors, 14 diodes, 13 ICs and 5 switches.
It belongs with the robotics & motion designs in this gallery.
From the project
The eletronics projects of our robots and basestation.
Main components on the Mainboard
Mainboard bill of materials (BOM)
175 components, 72 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP1117-33 | SOT-223-3_TabPin2 | U1 |
| 1 | MCP6L01x-xOT | SOT-23-5 | U101 |
| 1 | AP63205WU | TSOT-23-6 | U103 |
| 1 | AP64500 | SOIC-8_3.9x4.9mm_P1.27mm | U104 |
| 2 | RP2040 | RP2040-QFN-56 | U201, U602 |
| 1 | SKY66112 | SKY66112 | U301 |
| 1 | SX1280 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm_ThermalVias | U302 |
| 2 | W25Q128JVS | SOIC-8_5.23x5.23mm_P1.27mm | U401, U701 |
| 1 | Opamp_Dual | TSSOP-8_4.4x3mm_P0.65mm | U501 |
| 1 | 74AHC1G08 | SOT-23-5 | U502 |
| 1 | BMI270 | 14-VFLGA (2.5x3) | U601 |
| 1 | Q_PMOS_GDS | TO-252-3_TabPin2 | Q101 |
| 1 | Q_NMOS_GSD | SOT-23 | Q102 |
| 1 | 52.0MHz | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y301 |
| 2 | 12MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y401, Y701 |
| 4 | Conn_01x02 | Molex_Micro-Fit_3.0_43650-0200_1x02_P3.00mm_Horizontal | J101, J103, J104, J105 |
| 1 | Conn_01x02 | SolderWire-1.5sqmm_1x02_P6mm_D1.7mm_OD3mm | J102 |
| 1 | Conn_02x06_Odd_Even | PinSocket_2x06_P2.54mm_Vertical_SMD | J201 |
| 2 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_GCT_USB4085 | J401, J701 |
| 2 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J402, J702 |
Show 52 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Conn_01x08_MountingPin | JST_PH_S8B-PH-SM4-TB_1x08-1MP_P2.00mm_Horizontal | J501 |
| 1 | Conn_01x04 | JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J502 |
| 1 | Conn_01x02_MountingPin | JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | J601 |
| 1 | Conn_01x08_MountingPin | JST_PH_B8B-PH-SM4-TB_1x08-1MP_P2.00mm_Vertical | J602 |
| 1 | Conn_01x03_MountingPin | JST_PH_B3B-PH-SM4-TB_1x03-1MP_P2.00mm_Vertical | J603 |
| 1 | Antenna_Shield | U.FL_Molex_MCRF_73412-0110_Vertical | AE301 |
| 1 | CPT-9019S | Buzzer_CUI_CPT-9019S-SMT | BZ601 |
| 1 | Fuse 10A | Fuse_1206_3216Metric | F101 |
| 5 | SW_Push | SW_SPST_TL3305A | SW101, SW401, SW402, SW701, SW702 |
| 5 | D | D_SOD-323 | D101, D102, D105, D401, D701 |
| 4 | LED_GREEN | LED_0603_1608Metric | D103, D106, D107, D108 |
| 1 | D_Zener_Dual_3V3 | SOT-23 | D104 |
| 4 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D601, D602, D603, D604 |
| 1 | 4u7 | L_1210_3225Metric | L101 |
| 1 | 10u | L_1210_3225Metric | L102 |
| 1 | 3n | L_0402_1005Metric | L301 |
| 1 | 2n5 | L_0402_1005Metric | L302 |
| 1 | 15u | L_1210_3225Metric | L303 |
| 5 | 1u | C_0402_1005Metric | C101, C404, C414, C704, C714 |
| 2 | 10u | C_0805_2012Metric | C102, C110 |
| 31 | 100n | C_0402_1005Metric | C103, C107, C108, C111, C301, C303, C304, C305 +23 |
| 5 | 22u | C_0603_1608Metric | C104, C105, C112, C113, C114 |
| 2 | 100u | C_0805_2012Metric | C106, C109 |
| 1 | 15p | C_0402_1005Metric | C115 |
| 1 | 2n7 | C_0402_1005Metric | C116 |
| 3 | 1n | C_0402_1005Metric | C302, C308, C309 |
| 2 | 10n | C_0402_1005Metric | C307, C316 |
| 1 | 0p5 | C_0402_1005Metric | C310 |
| 1 | 100p | C_0402_1005Metric | C311 |
| 1 | 0p8 | C_0402_1005Metric | C312 |
| 2 | 1p2 | C_0402_1005Metric | C313, C314 |
| 1 | 470n | C_0402_1005Metric | C315 |
| 4 | 27p | C_0402_1005Metric | C402, C403, C702, C703 |
| 5 | 10k | R_0402_1005Metric | R101, R103, R106, R402, R702 |
| 2 | 1M | R_0402_1005Metric | R102, R109 |
| 2 | 2k2 | R_0402_1005Metric | R104, R108 |
| 1 | 68k | R_0402_1005Metric | R105 |
| 2 | 100k | R_0402_1005Metric | R107, R110 |
| 1 | 10m/1W | R_1206_3216Metric | R111 |
| 2 | 100R | R_0402_1005Metric | R112, R601 |
| 1 | 309k | R_0402_1005Metric | R113 |
| 6 | 1k | R_0402_1005Metric | R114, R401, R405, R603, R701, R705 |
| 1 | 270R | R_0402_1005Metric | R115 |
| 1 | 37k4 | R_0402_1005Metric | R116 |
| 1 | 200k | R_0402_1005Metric | R117 |
| 1 | 22k1 | R_0402_1005Metric | R118 |
| 4 | 27R4 | R_0402_1005Metric | R403, R404, R703, R704 |
| 11 | 2k 0.1% | R_0402_1005Metric | R501, R502, R503, R504, R505, R506, R507, R508 +3 |
| 1 | 220k | R_0402_1005Metric | R511 |
| 9 | 1k 0.1% | R_0402_1005Metric | R512, R513, R514, R515, R516, R517, R518, R519 +1 |
| 1 | 470R | R_0402_1005Metric | R521 |
| 1 | 6k8 | R_0402_1005Metric | R602 |
Mainboard design files
The KiCad project lives in the luhbots/luhsoccer_electronics repository on GitHub; these links point at the commit this page was built from.
Mainboard: common questions
What microcontroller does the Mainboard use?
The Mainboard is built around the RP2040, from the RP2040/RP2350 family.
How big is the Mainboard PCB?
The Mainboard measures 96 × 60 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the Mainboard?
175 components, from 72 distinct parts. The full bill of materials is listed on this page.
Where can I download the Mainboard design files?
From the luhbots/luhsoccer_electronics repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Mainboard design in my own project?
The repository has no license, so all rights stay with luhbots. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Mainboard 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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