Mainboard
About the Mainboard PCB
Mainboard is an open source Microchip SAM PCB design by Sierra-Lobo, published on GitHub under the CC-BY-SA-4.0 license. It is a 6-layer board measuring 90.2 × 101.1 mm, with 312 components from 101 distinct parts.
Its main chip is the ATSAMD51N20A-AUT, from the Microchip SAM family. Other key parts include the MAX706RESA, ADM1176-1ARMZ-R7, TPS54226PWPR, W25Q80DVSNIG and EP2W+. By type, the board carries 127 resistors, 89 capacitors, 37 transistors, 23 ICs, 12 diodes and 9 connectors.
It belongs with the power & battery and science & space designs in this gallery.
From the project
PyCubed mainboard v5 fork by Sierra Lobo for Foras Promineo CubeSat
Main components on the Mainboard
Mainboard bill of materials (BOM)
312 components, 101 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MAX706RESA | SO-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | ATSAMD51N20A-AUT | TQFP-100_14x14mm_P0.5mm | U2 |
| 1 | ADM1176-1ARMZ-R7 | ADM1176-1ARMZ-R7 | U4 |
| 1 | TPS54226PWPR TPS54226PWPRPWP14_2P31X2P46-L | PWP14_2P31X2P46-L | U5 |
| 1 | W25Q80DVSNIG MR25H40MDF | SON127P600X500X90-9N | U8 |
| 1 | EP2W+ | QFN32-5X5MM | U13 |
| 1 | S1216V8 | S1216_24PIN_PACKAGE | U14 |
| 1 | RFM9xBreakout | HOPERF_RFM9XW_SMD | U15 |
| 1 | PE014006 TE PE014006 | RELAY_PE014006 | U16 |
| 1 | BQ25883RGER | QFN50P400X400X100-25N-D | U17 |
| 1 | RFM98PW | RFM95PW | U23 |
| 1 | RFM98PW | RFM95PW | U24 |
| 1 | AP2161W | SOT-23-5 | U200 |
| 1 | PCA9543APW,118 | TSSOP-14_4.4x5mm_P0.65mm | U201 |
| 2 | TPS63070 | TPS63070RNMR | U203, U210 |
| 2 | IAM-20380 | IAM-20380 | U204, U207 |
| 2 | MMC5983MA | MMC5983MA | U205, U208 |
| 2 | MXC6655XA | MXC6655XA | U206, U209 |
| 1 | LT3652HVEMSE#TRPBF | MSOP-12-1EP_3x4mm_P0.65mm_EP1.65x2.85mm_ThermalVias | U211 |
| 3 | DMN100-7-F | SOT-23 | Q1, Q4, Q5 |
Show 81 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | MMDT5551-7-F | SOT-363_SC-70-6 | Q2, Q3, Q7, Q15, Q16 |
| 1 | SMMBT2222AWT1G | SOT-323_SC-70 | Q6 |
| 1 | MBT2222ADW1T1G MMDT5551-7-F | SOT-363_SC-70-6 | Q8 |
| 1 | MMDT2907AQ-7-F | SOT-363_SC-70-6 | Q11 |
| 4 | BSS138DWQ-7 | BSS138DWQ-7 | Q12, Q13, Q18, Q19 |
| 1 | MMBT2907ALT1G FJV992FMTF | SOT-23 | Q17 |
| 3 | IRF7404TRPBF | SOIC-8_3.9x4.9mm_P1.27mm | Q20, Q21, Q22 |
| 4 | BC847BM3T5G | SOT-723 | Q200, Q201, Q202, Q203 |
| 4 | MMBT3906-7-F | SOT-23 | Q204, Q209, Q215, Q222 |
| 3 | MMBT4401-7-F | SOT-23 | Q205, Q210, Q221 |
| 2 | IRF7458 | SOIC-8_3.9x4.9mm_P1.27mm | Q206, Q208 |
| 5 | IRF7404 | SOIC-8_3.9x4.9mm_P1.27mm | Q207, Q211, Q212, Q213, Q220 |
| 1 | SC-32S32.768kHz20PPM7pF 32.768kHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 5031821852 503182-1852 | MOLEX_503182-1852 | J1 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J2 |
| 4 | 901-144 Amphenol_901-144 | SMA_Amphenol_901-144_Vertical | J5, J6, J7, J12 |
| 1 | ZX62-AB-5PA(31) | ZX62-AB-5PA(31) | J200 |
| 1 | TSM-102-01-L-SV-P-TR | PinSocket_1x02_P2.54mm_Vertical_SMD_Pin1Right | J201 |
| 1 | Card Edge for HSEC8-160-01-S-DV-A-K-TR | HSEC8-160-CARD-EDGE | P1 |
| 1 | MountingHole_Pad | 125mil_hole | H200 |
| 3 | SLI-Backplane-Blank-Card-KiCad:125mil_hole | 125mil_hole | H201, H202, H203 |
| 1 | KMR231NG LFS | BTN_KMR2_4.6X2.8 | SW1 |
| 1 | SW_Push_SPST | EVQP7C01P | SW200 |
| 2 | CG0402MLU-05G | C_0402_1005Metric | Z200, Z201 |
| 1 | WS2812B-B WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1 |
| 1 | DFLS130L-7 DFLS130L | PWRDI-123 | D4 |
| 1 | RED | APA2107x | D200 |
| 1 | YELLOW | APA2107x | D201 |
| 1 | GREEN | APA2107x | D202 |
| 1 | ORANGE | APA2107x | D203 |
| 4 | 1N4148WSTR | D_SOD-323 | D204, D205, D208, D209 |
| 2 | V4PAL45HM3_A/I | SMPA | D206, D207 |
| 1 | MGFL2012F100MT-LF 10uH | L_1210_3225Metric | L1 |
| 1 | HPC5040NF-3R3MTH 3.3uH | L_2141 | L2 |
| 1 | MCS25GD-1R0MMP 1uH | L_2510 | L4 |
| 2 | 1.5uH | L_Bourns_SRN8040TA | L201, L202 |
| 1 | 22uH | L_Vishay_IHLP-2525 | L203 |
| 2 | 8pF | C_0603_1608Metric | C1, C2 |
| 17 | 0.1uF | C_0603_1608Metric | C3, C5, C10, C11, C21, C30, C216, C217 +9 |
| 11 | 1uF | C_0603_1608Metric | C4, C12, C13, C15, C27, C33, C221, C222 +3 |
| 16 | 10uF | C_0805_2012Metric | C6, C14, C16, C35, C39, C44, C46, C200 +8 |
| 6 | 10nF | C_0603_1608Metric | C8, C40, C41, C42, C220, C227 |
| 10 | 22uF | C_0805_2012Metric | C17, C18, C37, C38, C213, C214, C215, C238 +2 |
| 4 | 100uF | C_1210_3225Metric | C19, C20, C249, C250 |
| 2 | 3.3nF | C_0603_1608Metric | C26, C32 |
| 1 | 4.7uF | C_0805_2012Metric | C34 |
| 1 | 47nF | C_0603_1608Metric | C36 |
| 7 | 0.1uF | C_0402_1005Metric | C201, C202, C204, C206, C207, C208, C209 |
| 1 | 47uF | C_1206_3216Metric | C203 |
| 1 | 1nF | C_0402_1005Metric | C205 |
| 2 | 2.2uF | C_0603_1608Metric | C223, C230 |
| 2 | 0.47uF | C_0603_1608Metric | C226, C233 |
| 6 | 10uF | C_1210_3225Metric | C242, C243, C245, C246, C247, C248 |
| 1 | 316K | R_0603_1608Metric | R1 |
| 1 | 110K | R_0603_1608Metric | R2 |
| 31 | 10k | R_0603_1608Metric | R3, R4, R5, R7, R21, R24, R25, R27 +23 |
| 1 | 0.1 | R_2512_6332Metric | R8 |
| 2 | 73.2K | R_0603_1608Metric | R13, R29 |
| 1 | 22.1K | R_0603_1608Metric | R14 |
| 26 | 100k | R_0603_1608Metric | R15, R30, R37, R38, R49, R73, R74, R93 +18 |
| 9 | 4.7k | R_0603_1608Metric | R22, R32, R33, R60, R68, R92, R213, R218 +1 |
| 3 | 3.3k | R_0603_1608Metric | R23, R226, R253 |
| 7 | 1K | R_0603_1608Metric | R26, R63, R64, R69, R70, R77, R78 |
| 1 | 5.23K | R_0603_1608Metric | R34 |
| 1 | 30.1K | R_0603_1608Metric | R35 |
| 1 | 3.16K | R_0603_1608Metric | R36 |
| 5 | 200K | R_0603_1608Metric | R47, R75, R76, R95, R96 |
| 10 | 0 | R_0603_1608Metric | R48, R53, R97, R98, R99, R101, R104, R107 +2 |
| 4 | 680 | R_0603_1608Metric | R71, R72, R86, R87 |
| 1 | 20K | R_0603_1608Metric | R110 |
| 2 | 10k | R_0402_1005Metric | R200, R211 |
| 1 | 1Meg | R_0402_1005Metric | R201 |
| 8 | 1.5k | R_0402_1005Metric | R202, R203, R204, R205, R206, R207, R208, R209 |
| 1 | DNP | R_0402_1005Metric | R210 |
| 2 | 2.2Meg | R_0603_1608Metric | R217, R247 |
| 2 | 523k | R_0603_1608Metric | R224, R251 |
| 2 | 330k | R_0603_1608Metric | R228, R255 |
| 1 | 0.05 | R_1206_3216Metric | R256 |
| 1 | 121k | R_0603_1608Metric | R257 |
| 1 | 634k | R_0603_1608Metric | R258 |
| 1 | 412k | R_0603_1608Metric | R262 |
Mainboard design files
The KiCad project lives in the Sierra-Lobo/mainboard-hardware 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 ATSAMD51N20A-AUT, from the Microchip SAM family.
How big is the Mainboard PCB?
The Mainboard measures 90.2 × 101.1 mm, has 6 copper layers and is 1.5748 mm thick.
How many components are on the Mainboard?
312 components, from 101 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Mainboard design files?
From the Sierra-Lobo/mainboard-hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Mainboard design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which Sierra-Lobo chose for the repository.
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 Microchip SAM firmware against it before you order a PCB.
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