Mainboard v2
About the Mainboard v2 PCB
Mainboard v2 is an open source ESP32 PCB design by Benjamin-girard-1, published on GitHub. It is a 4-layer board measuring 190 × 110 mm, with 244 components from 129 distinct parts.
Its main chip is the C5947, from the ESP32 family. Other key parts include the TPS61170, LT3042XMSE, TPS61040DBV, 74HC595D,118 and TPS25210LRPWR. By type, the board carries 107 capacitors, 93 resistors, 20 ICs, 7 diodes, 6 inductors and 5 connectors.
Main components on the Mainboard v2
Mainboard v2 bill of materials (BOM)
244 components, 129 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS61170 | WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U1 |
| 1 | LT3042XMSE LT3042xMSE | MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm | U2 |
| 1 | TPS61040DBV | SOT-23-5 | U3 |
| 1 | C5947 74HC595D,118 | SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | C5947 ESP32-S3-DevKitC | MODULE_ESP32-S3-DEVKITC | U5 |
| 1 | 74HC595D,118 | SOIC-16_3.9x9.9mm_P1.27mm | U6 |
| 1 | TPS25210LRPWR LSM6DSVETR | LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U7 |
| 1 | TPS25210LRPWR SCL3300-D01-10 | SCL3300-D01-10_MUR | U8 |
| 1 | TPS54331DR TPS2116DRL | SOT-583-8 | U9 |
| 1 | TPS7A2033PDBVR TPS54331DR | SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | AD7779ACPZ TPS7A2033PDBVR | SOT-23-5 | U11 |
| 1 | TPS7A4901DGNR AD7779ACPZ | QFN-64-1EP_9x9mm_P0.5mm_EP7.65x7.65mm | U12 |
| 1 | TPS7A3301RGWR TPS7A4901DGNR | HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm | U13 |
| 1 | TPS63700DRCR TPS7A3301RGWR | Texas_RGW0020A_VQFN-20-1EP_5x5mm_P0.65mm_EP3.15x3.15mm | U14 |
| 1 | TS3A27518ERTW TPS63700DRCR | VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm | U15 |
| 1 | USB2641-HZH-02 TS3A27518EPWR | TSSOP-24_4.4x7.8mm_P0.65mm | U16 |
| 1 | SCL3300-D01-10 USB2641-HZH-02 | QFN-48-1EP_7x7mm_P0.5mm_EP5.3x5.3mm | U17 |
| 1 | TPS2116DRL | SOT-583-8 | U18 |
| 1 | LSM6DSVETR TPS62933 | SOT-583-8 | U19 |
| 1 | MAX-M10S | ublox_MAX | U20 |
Show 109 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AO3401A | SOT-23 | Q2 |
| 1 | AO3400A | SOT-23 | Q3 |
| 1 | X322524MOB4SI | Crystal_SMD_3225-4Pin_3.2x2.5mm | X1 |
| 1 | OT2JI-111-8.192M | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 2 | 550910274 550910374 | CONN_MOLEX_02x15_55091-0374 | J1, J3 |
| 1 | C565324 USB_C_Receptacle_USB2.0_16P | GCT_USB4105-GF-A | J2 |
| 1 | C428492 Micro_SD_CARD | CONN_503398-1892_MOL | J4 |
| 1 | Conn_Coaxial | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J5 |
| 2 | TestPoint | TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP3, TP4 |
| 5 | SS34 | D_SMA | D1, D2, D8, D9, D10 |
| 1 | H5VUD5BB SS34 | D_SMA | D4 |
| 1 | SS34 LED | LED_0805_2012Metric | D11 |
| 1 | C14709 120Ω@100MHz 2A 50mΩ | L_0603_1608Metric | FB1 |
| 4 | 10U 10u | ZEMS0850-100M_8.5x8.0mm | L1, L2, L3, L4 |
| 1 | 10u | ZEMS0850-100M_8.5x8.0mm | L5 |
| 3 | 10U 10u | C_0805_2012Metric | C1, C7, C13 |
| 4 | 4U7 4u7 | C_1206_3216Metric | C2, C6, C9, C10 |
| 3 | 10N 10n | C_0603_1608Metric | C3, C68, C73 |
| 1 | 22P 22p | C_0603_1608Metric | C4 |
| 3 | 1u | C_0805_2012Metric | C5, C94, C103 |
| 14 | 100N 100n | C_0603_1608Metric | C8, C11, C12, C16, C21, C38, C39, C42 +6 |
| 4 | 100N 1u | C_0805_2012Metric | C14, C64, C98, C99 |
| 12 | 100n | C_0603_1608Metric | C15, C19, C20, C44, C45, C47, C48, C58 +4 |
| 3 | 10U 100n | C_0603_1608Metric | C17, C23, C72 |
| 2 | 10N 100n | C_0603_1608Metric | C18, C61 |
| 1 | 22U 10u | C_0805_2012Metric | C22 |
| 1 | 22U 10u | C_0603_1608Metric | C24 |
| 3 | 47U 100n | C_0603_1608Metric | C25, C55, C69 |
| 1 | 4N7 22u | C_1206_3216Metric | C26 |
| 1 | 10P 15p | C_0603_1608Metric | C27 |
| 1 | 10N 22u | C_1206_3216Metric | C28 |
| 1 | 10N 47u | C_1206_3216Metric | C29 |
| 1 | 4n7 | C_0603_1608Metric | C30 |
| 1 | 10p | C_0603_1608Metric | C31 |
| 2 | 4U7 22n | C_0603_1608Metric | C32, C35 |
| 1 | 100N 47u | C_1206_3216Metric | C33 |
| 6 | 100N 10u | C_0805_2012Metric | C34, C41, C56, C67, C71, C96 |
| 1 | 10U 470mF | C_Radial_D8.0mm_P11.50mm | C36 |
| 6 | 100N 4u7 | C_1206_3216Metric | C37, C40, C79, C80, C81, C82 |
| 1 | 220N 100n | C_0603_1608Metric | C46 |
| 5 | 1n | C_0603_1608Metric | C49, C52, C57, C107, C108 |
| 3 | 100N 1n | C_0603_1608Metric | C50, C53, C54 |
| 1 | 10U 47u | C_1206_3216Metric | C60 |
| 1 | 10U 1u | C_0805_2012Metric | C62 |
| 1 | 10N 1u | C_0805_2012Metric | C63 |
| 1 | 220N 10u | C_0805_2012Metric | C65 |
| 1 | 10U 10n | C_0603_1608Metric | C66 |
| 1 | 10P 220n | C_0603_1608Metric | C70 |
| 1 | 4U7 47u | C_1206_3216Metric | C74 |
| 1 | 4U7 10p | C_0603_1608Metric | C75 |
| 3 | 4U7 100n | C_0603_1608Metric | C76, C86, C87 |
| 1 | 4U7 10u | C_0805_2012Metric | C77 |
| 1 | 4N7 10n | C_0603_1608Metric | C78 |
| 1 | 100N 4n7 | C_0603_1608Metric | C83 |
| 1 | 10U 4u7 | C_1206_3216Metric | C91 |
| 1 | 15P 4u7 | C_1206_3216Metric | C92 |
| 1 | 15P 100n | C_0603_1608Metric | C95 |
| 2 | 100N 15p | C_0603_1608Metric | C97, C100 |
| 3 | 100n | C_0402_1005Metric | C104, C105, C106 |
| 2 | 0 | R_1206_3216Metric | R1, R2 |
| 1 | 49K9 49k9 | R_0603_1608Metric | R3 |
| 9 | 100K 100k | R_0603_1608Metric | R4, R7, R8, R17, R52, R56, R73, R78 +1 |
| 7 | 10K 10k | R_0603_1608Metric | R5, R18, R100, R101, R102, R103, R104 |
| 1 | 3K6 3k6 | R_0603_1608Metric | R6 |
| 1 | 510K 510k | R_0603_1608Metric | R12 |
| 1 | 1k | R_0603_1608Metric | R13 |
| 1 | 200K 200k | R_0603_1608Metric | R14 |
| 1 | 90K9 90k9 | R_1206_3216Metric | R16 |
| 6 | 10k | R_0603_1608Metric | R19, R20, R39, R58, R77, R79 |
| 12 | 22 | R_0603_1608Metric | R21, R60, R63, R65, R66, R68, R69, R71 +4 |
| 1 | 470K 22 | R_0603_1608Metric | R22 |
| 3 | 100K 22 | R_0603_1608Metric | R23, R59, R76 |
| 1 | 200K 5k1 | R_0603_1608Metric | R24 |
| 1 | 39K 5k1 | R_0603_1608Metric | R25 |
| 1 | 5K1 100k | R_0603_1608Metric | R29 |
| 1 | 100 300k | R_0603_1608Metric | R30 |
| 2 | 100 100k | R_0603_1608Metric | R31, R49 |
| 1 | 100K 300k | R_0603_1608Metric | R32 |
| 2 | 300k | R_0603_1608Metric | R34, R54 |
| 1 | ~ | R_0603_1608Metric | R36 |
| 1 | 470K 300k | R_0603_1608Metric | R37 |
| 1 | 100K 75k | R_0603_1608Metric | R38 |
| 1 | 200K 24k | R_0603_1608Metric | R40 |
| 1 | 39K 100k | R_0603_1608Metric | R41 |
| 1 | 75K 100k | R_0603_1608Metric | R42 |
| 1 | 10K 75k | R_0603_1608Metric | R43 |
| 1 | 24K 39k | R_0603_1608Metric | R44 |
| 2 | 100 | R_0603_1608Metric | R45, R46 |
| 1 | 39K 22 | R_2512_6332Metric | R47 |
| 1 | 100 200k | R_0603_1608Metric | R48 |
| 6 | 100k | R_0603_1608Metric | R53, R70, R75, R87, R90, R95 |
| 2 | 100K 1k | R_0603_1608Metric | R55, R80 |
| 1 | 300K 22 | R_0603_1608Metric | R57 |
| 1 | 10K 22 | R_0603_1608Metric | R61 |
| 1 | 27K 22 | R_0603_1608Metric | R67 |
| 1 | 39k | R_0603_1608Metric | R83 |
| 1 | 39K 12k | R_0603_1608Metric | R84 |
| 1 | 12K 22 | R_0603_1608Metric | R85 |
| 1 | 100K 330k | R_0603_1608Metric | R88 |
| 1 | 330K 10 | R_0603_1608Metric | R89 |
| 1 | 510k | R_0603_1608Metric | R92 |
| 1 | 510K 100k | R_0603_1608Metric | R93 |
| 2 | 100K 10k | R_0603_1608Metric | R97, R109 |
| 1 | 10K 12k | R_0603_1608Metric | R98 |
| 1 | 12K 10k | R_0603_1608Metric | R99 |
| 1 | 10K 1k | R_0603_1608Metric | R105 |
| 1 | 68k | R_0603_1608Metric | R106 |
| 1 | 68K 10k | R_0603_1608Metric | R107 |
| 1 | 10K 100k | R_0603_1608Metric | R108 |
Mainboard v2 design files
The KiCad project lives in the Benjamin-girard-1/magnetometer-node-old repository on GitHub; these links point at the commit this page was built from.
Mainboard v2: common questions
What microcontroller does the Mainboard v2 use?
The Mainboard v2 is built around the C5947, from the ESP32 family.
How big is the Mainboard v2 PCB?
The Mainboard v2 measures 190 × 110 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Mainboard v2?
244 components, from 129 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 v2 design files?
From the Benjamin-girard-1/magnetometer-node-old 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 v2 design in my own project?
The repository has no license, so all rights stay with Benjamin-girard-1. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Mainboard v2 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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