Expansion board v4
About the Expansion board v4
Expansion board v4 is an open source RP2040/RP2350 PCB design by naizhao, published on GitHub under the MIT license. It is a 6-layer board measuring 100 × 62 mm, with 213 components from 99 distinct parts.
Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ME6211C33M5, TPS7A2033PDBVR, BNO085, BMP388 and QMC5883P. By type, the board carries 93 capacitors, 52 resistors, 21 ICs, 14 inductors, 9 connectors and 5 diodes.
It belongs with the rf & radio, power & battery and sensors designs in this gallery, and the repository also holds 1 earlier revision of it.
From the project
Pilot Kit Box (ESP32-P4 Edition)
Integrated ADS-B / GNSS / IMU expansion board for the Pilot Kit Box 集成 ADS-B / GNSS / IMU 扩展板
A 6-layer, 100.1 × 62.1 mm HAT that stacks onto the Waveshare ESP32-P4-WIFI6-Touch-LCD-4.3 carrier's 2×20 header. It replaces the four discrete modules used by the current prototype (RTL-SDR dongle, BNO085, GT-U8 GNSS, BMP388) with a single board — including its own 1090 MHz receive chain, so no RTL-SDR dongle is required.
Main components on the Expansion board v4
Expansion board v4 bill of materials (BOM)
213 components, 99 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ME6211C33M5 | SOT-23-5 | U1 |
| 2 | TPS7A2033PDBVR | SOT-23-5 | U2, U3 |
| 1 | BNO085 | BNO085_LGA-28 | U4 |
| 1 | BMP388 | BMP388_LGA-10 | U5 |
| 1 | QMC5883P | LGA-16_3x3mm_P0.5mm | U6 |
| 1 | ATGM336H-6N-74 | ATGM336H_LCC-18 | U7 |
| 1 | RP2040 | QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U8 |
| 1 | W25Q128JVSIQ | SOIC-8_5.3x5.3mm_P1.27mm | U9 |
| 1 | CC1312R1F3RGZR | QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm | U10 |
| 1 | QPL9547TR7 | DFN-8-1EP_2x2mm_P0.5mm_EP0.86x1.55mm | U11 |
| 1 | BGA2817 | SOT-363_SC-70-6 | U12 |
| 1 | AD8313ARMZ | MSOP-8_3x3mm_P0.65mm | U14 |
| 1 | TLV3501(TOKMAS) | SOT-23-6 | U15 |
| 2 | XA17-G4K | SOT-363_SC-70-6 | U16, U17 |
| 1 | CH224K | CH224K_ESSOP-10 | U18 |
| 1 | SY6970 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm_ThermalVias | U19 |
| 1 | SY7069 | TSOT-23-6 | U20 |
| 1 | BK4819QN32SC | QFN-32-1EP_4x4mm_P0.4mm_EP2.65x2.65mm | U21 |
| 1 | PCM1808PWR | TSSOP-14_4.4x5mm_P0.65mm | U22 |
| 4 | AO3401A | SOT-23 | Q2, Q3, Q4, Q5 |
Show 79 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 12MHz CL=10pF ABM8-272-T3 | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 48MHz ABM8W-7pF | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 32.768kHz FC-135 | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y3 |
| 1 | 26MHz TCXO <=2.5ppm | Crystal_SMD_2520-4Pin_2.5x2.0mm | Y4 |
| 1 | J3_HAT_2x20_SMD排针 | PinHeader_2x20_P2.54mm_Vertical_SMD | J1 |
| 1 | U.FL_GNSS_EXT(经尾线转SMA) | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J2 |
| 1 | USB-C_16P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J4 |
| 1 | U.FL_978 | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J5 |
| 1 | U.FL_1090_EXT(经尾线转SMA) | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J6 |
| 1 | U.FL_IFA_TEST(π后调试口) | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J7 |
| 1 | U.FL→内置patch | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J8 |
| 1 | MX1.25WT-2P BAT | MX1.25WT-2P_1x02-1MP_P1.25mm_Horizontal | J9 |
| 1 | U.FL_VHF(经尾线转SMA) | U.FL_Hirose_U.FL-R-SMT-1_Vertical | J10 |
| 1 | IFA_1090 | ANT_IFA_1090MHz | ANT1 |
| 4 | 6V/200mA | Fuse_0805_2012Metric | F2, F3, F4, F5 |
| 2 | TA0970A | TA0970A_SMD3838-6 | FL1, FL2 |
| 1 | NCP18XH103F03RB 10k NTC | R_0603_1608Metric | RT1 |
| 1 | DNP 并-天线侧 | C_0603_1608Metric | ZP1 |
| 1 | DNP 并-电台侧 | C_0603_1608Metric | ZP2 |
| 1 | 0R 串 | L_0603_1608Metric | ZS1 |
| 5 | TPESD8L3.3 0.3pFtyp 0.5pFmax | D_0402_1005Metric | D2, D3, D4, D5, D6 |
| 1 | 18nH 0402CS-18NXGRW | L_0402_1005Metric | L1 |
| 2 | 33NH 33nH | L_0402_1005Metric | L2, L15 |
| 1 | 6.8uH | L_0805_2012Metric | L7 |
| 3 | 100NH 100nH | L_0402_1005Metric | L8, L14, L18 |
| 2 | 7.5NH 7.5nH | L_0402_1005Metric | L9, L13 |
| 1 | 27NH 27nH | L_0402_1005Metric | L10 |
| 2 | 6.8NH 6.8nH | L_0402_1005Metric | L11, L12 |
| 1 | 1uH | L_Bourns-SRN4018 | L16 |
| 1 | 4.7uH XEL4030-472MEC | L_Coilcraft_XxL4030 | L17 |
| 8 | 10uF | C_0805_2012Metric | C1, C18, C73, C74, C75, C91, C92, C93 |
| 11 | 1uF | C_0603_1608Metric | C2, C3, C4, C6, C28, C29, C67, C78 +3 |
| 2 | 1uF | C_0402_1005Metric | C5, C48 |
| 27 | 100nF | C_0603_1608Metric | C10, C11, C12, C13, C14, C16, C17, C22 +19 |
| 1 | 4.7uF | C_0603_1608Metric | C15 |
| 2 | 15pF C0G | C_0603_1608Metric | C19, C20 |
| 11 | 100pF | C_0402_1005Metric | C21, C30, C36, C38, C39, C45, C53, C54 +3 |
| 5 | 100pF C0G | C_0402_1005Metric | C31, C32, C33, C34, C35 |
| 2 | 100nF | C_0402_1005Metric | C37, C52 |
| 2 | 3.6PF 3.6pF | C_0402_1005Metric | C40, C44 |
| 1 | 2.7PF 2.7pF | C_0402_1005Metric | C41 |
| 1 | 6.2PF 6.2pF | C_0402_1005Metric | C42 |
| 1 | 3PF 3pF | C_0402_1005Metric | C43 |
| 1 | 3pF | C_0603_1608Metric | C46 |
| 1 | 200pF | C_0603_1608Metric | C47 |
| 1 | 1nF | C_0603_1608Metric | C51 |
| 3 | 100pF | C_0603_1608Metric | C55, C56, C88 |
| 2 | 22uF | C_0805_2012Metric | C60, C66 |
| 3 | 18pF | C_0603_1608Metric | C68, C69, C89 |
| 1 | 47nF | C_0603_1608Metric | C70 |
| 1 | 4.7uF(带电源版) | C_0603_1608Metric | C71 |
| 1 | 10uF | C_1206_3216Metric | C72 |
| 1 | 22uF | C_1206_3216Metric | C76 |
| 1 | 22uF 16V X5R | C_1206_3216Metric | C77 |
| 1 | 1uF 25V | C_0603_1608Metric | C80 |
| 1 | 470pF C0G | C_0402_1005Metric | C81 |
| 1 | 10nF C0G | C_0603_1608Metric | C87 |
| 19 | 10k | R_0603_1608Metric | R1, R5, R6, R17, R18, R26, R27, R32 +11 |
| 2 | 4.7k | R_0603_1608Metric | R2, R3 |
| 3 | 1k | R_0603_1608Metric | R4, R31, R43 |
| 2 | 5.1k DNP(带电源版) | R_0603_1608Metric | R7, R8 |
| 2 | 27R | R_0603_1608Metric | R9, R10 |
| 1 | 3.32k | R_0402_1005Metric | R11 |
| 1 | 52.3R | R_0402_1005Metric | R19 |
| 7 | 0R | R_0603_1608Metric | R21, R22, R23, R37, R48, R49, R60 |
| 1 | 0R DNP(旁路外接) | R_0402_1005Metric | R24 |
| 1 | 0R DNP(旁路板载) | R_0402_1005Metric | R25 |
| 1 | 1k DNP | R_0402_1005Metric | R30 |
| 1 | 100k | R_0603_1608Metric | R33 |
| 1 | 1k DNP | R_0603_1608Metric | R36 |
| 1 | 180R | R_0603_1608Metric | R38 |
| 1 | 5.62k | R_0603_1608Metric | R39 |
| 1 | 31.6k | R_0603_1608Metric | R40 |
| 1 | 470k | R_0603_1608Metric | R41 |
| 1 | 150k | R_0603_1608Metric | R42 |
| 1 | 30K 30k | R_0603_1608Metric | R50 |
| 2 | 10K 10k | R_0402_1005Metric | R52, R53 |
| 1 | 10R | R_0402_1005Metric | R54 |
| 1 | 33R | R_0603_1608Metric | R57 |
Expansion board v4 design files
The KiCad project lives in the naizhao/Pilot-Kit-Box-ESP32-P4 repository on GitHub; these links point at the commit this page was built from.
Expansion board v4: common questions
What microcontroller does the Expansion board v4 use?
The Expansion board v4 is built around the RP2040, from the RP2040/RP2350 family.
How big is the Expansion board v4?
The Expansion board v4 measures 100 × 62 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the Expansion board v4?
213 components, from 99 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 Expansion board v4 design files?
From the naizhao/Pilot-Kit-Box-ESP32-P4 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 Expansion board v4 design in my own project?
Yes, under the terms of its MIT license, which naizhao chose for the repository.
Can I test firmware for the Expansion board v4 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.
More boards in Pilot-Kit-Box-ESP32-P4
Earlier revisions in the repo: expansion-board-v3
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