RelativeGPS
About the RelativeGPS PCB
RelativeGPS is an open source STM32 PCB design by m-guihard, published on GitHub. It is a 4-layer board measuring 65 × 65 mm, with 91 components from 53 distinct parts.
Its main chip is the STM32L431RCT6TR, from the STM32 family. Other key parts include the LSM303AH, TCA39306DCUR, BGA725L6E6327FTSA1, ST1S12GR and B39162B4327P810. By type, the board carries 36 capacitors, 15 resistors, 13 ICs, 11 diodes, 6 inductors and 4 connectors.
Main components on the RelativeGPS
RelativeGPS bill of materials (BOM)
91 components, 53 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LSM303AH STMicroelectronics | LSM303AHTR | U1 |
| 1 | TCA39306DCUR Texas Instruments | TCA39306DCUR | U2 |
| 1 | BGA725L6E6327FTSA1 Infineon Technologies | BGA725L6E6327FTSA1 | U3 |
| 1 | ST1S12GR STMicroelectronics | ST1S12GR | U4 |
| 1 | B39162B4327P810 Qualcomm (RF front-end (RFFE) filters) | B39162B4327P810 | U5 |
| 1 | TESEO-LIV3R STMicroelectronics | TESEO-LIV3R | U6 |
| 1 | 74LVC1T45GW.125 Nexperia USA Inc. | TSSOP6_SOT363-2 | U7 |
| 1 | TPS61222DCKR Texas Instruments | TPS61222DCKR | U8 |
| 1 | TPS79318DBVR Texas Instruments | TPS79318DBVR | U9 |
| 1 | RYLR998 Reyax | RYLR998_flat | U10 |
| 1 | STM32L431RCT6TR STMicroelectronics | LQFP-64_10x10mm_P0.5mm | U11 |
| 1 | ASE-8.000MHZ-L-C-T Abracon LLC | ASE-8.000MHZ-L-C-T | U12 |
| 1 | MIC5330-SSYML MIC5330-SSYML-TR Microchip Technology | MIC5330 | U13 |
| 1 | FTSH-107-01-L-DV-K-P FTSH-107-01-L-DV-K-P-TR Samtec Inc. | FTSH-107-01-L-DV-K-P-TR | CN1 |
| 1 | SOLDER_JUMPER-2_OPEN Solder_Jumper-2_Open | SolderJumper-2_Open | CN2 |
| 1 | TC2030-IDC - | Debug_pads_6pin | CN3 |
| 1 | 5033981892 Molex | Micro_SD_5033981892 | CN4 |
| 1 | ANT2525B00DT1516S Pulse Electronics | ANT2525B00DT1516S | ANT1 |
| 1 | AAA_2X_HOLDER AAA_2X_Holder Keystone Electronics | AAA_2X_Holder | B7 |
| 1 | SWITCH_SLIDE_2POS switch_slide_2pos EAO | 09.10290.01 | SW1 |
Show 33 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | EVQ-P7A01P Panasonic Electronic Components | EVQ-P7A01P | SW2, SW3 |
| 1 | TL3315NF160Q E-Switch | TL3315NF160Q | SW4 |
| 11 | COM-16347 SparkFun Electronics | COM-16347 | D1, D2, D3, D4, D5, D6, D7, D8 +3 |
| 1 | L_5.6nH_2%_1.77A_40mOhm Murata Electronics | LQW15AN5N6G80D | L1 |
| 1 | L_10uH_20%_1.51A_160mOhm TDK Corporation | LTF5022T-100M1R3-D | L2 |
| 1 | L_27nH_5%_0.35A_460mOhm Murata Electronics | LQG15HS27NJ02D | L3 |
| 1 | L_4.7uH_20%_1.7A_120mOhm Murata Electronics | LQH3NPZ4R7MMEL | L4 |
| 2 | FERR_120R@100MHz_5%_1.5A_95mOhm Murata Electronics | FERR_0402_H0.55 | L5, L6 |
| 2 | C_120pF_50V_5%_C0G_0402_H0.55 Murata Electronics | C_0402_H0.55 | C1, C4 |
| 2 | C_4.7uF_10V_10%_X7S_0603_H0.95 Murata Electronics | C_0603_H0.95 | C2, C15 |
| 1 | C_22uF_6.3V_20%_X5R_0805_H1.4 KEMET | C_0805_H1.4 | C3 |
| 2 | C_10nF_50V_10%_X7R_0402_H0.55 TDK Corporation | C_0402_H0.55 | C5, C28 |
| 1 | C_56pF_50V_2%_C0G_0201_H0.33 Murata Electronics | C_0402_H0.55 | C6 |
| 12 | C_100nF_50V_10%_X7R_0402_H0.55 Murata Electronics | C_0402_H0.55 | C7, C9, C12, C17, C21, C27, C29, C31 +4 |
| 3 | C_1uF_50V_10%_X5R_0402_H0.55 Murata Electronics | C_0402_H0.55 | C8, C10, C11 |
| 3 | C_2.2uF_25V_25%_X5R_0402_H0.55 Murata Electronics | C_0402_H0.55 | C13, C26, C30 |
| 1 | C_220nF_16V_10%_X7R_0402_H0.55 Murata Electronics | C_0402_H0.55 | C14 |
| 1 | C_1uF_50V_10%_X5R_0603_H0.9 Murata Electronics | C_0603_H0.95 | C16 |
| 1 | C_100pF_50V_5%_C0G_0603_H0.9 Murata Electronics | C_0603_H0.95 | C18 |
| 3 | C_22uF_25V_20%_X5S_0603_H1 Murata | C_0603_H0.95 | C19, C20, C25 |
| 2 | C_10uF_10V_20%_X5R_0603H0.9 Murata Electronics | C_0603_H0.95 | C22, C23 |
| 1 | C_47pF_50V_5%_C0G_0402 Murata Electronics | C_0402_H0.55 | C24 |
| 1 | C_10uF_10V_20%_X5R_0402_H0.55 Murata Electronics | C_0402_H0.55 | C36 |
| 1 | R_1M_5%_1/16W_0402 YAGEO | R_0402_H0.4 | R1 |
| 1 | R_0R_0603 YAGEO | R_0603_H0.55 | R2 |
| 1 | R_68k_1%_1/16W_0402 YAGEO | R_0402_H0.4 | R3 |
| 1 | R_15k_1%_1/16W_0402 YAGEO | R_0402_H0.4 | R4 |
| 2 | R_4k7_5%_1/16W_0402 YAGEO | R_0402_H0.4 | R5, R7 |
| 1 | R_10k_5%_1/16W_0402 YAGEO | R_0402_H0.4 | R6 |
| 1 | R_200k_1%_1/16W_0402 YAGEO | R_0402_H0.4 | R8 |
| 2 | R_DNP_0402 | R_0402_H0.4 | R9, R10 |
| 4 | R_100k_1%_1/16W_0402 YAGEO | R_0402_H0.4 | R11, R12, R13, R14 |
| 1 | R_0R_1%_1/16W_0402 YAGEO | R_0402_H0.4 | R15 |
RelativeGPS design files
The KiCad project lives in the m-guihard/relativeGPS repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/relativeGPS.kicad_pcb
- SchematicPCB/relativeGPS.kicad_sch
- BOMPCB/BOM.csv
RelativeGPS: common questions
What microcontroller does the RelativeGPS use?
The RelativeGPS is built around the STM32L431RCT6TR, from the STM32 family.
How big is the RelativeGPS PCB?
The RelativeGPS measures 65 × 65 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the RelativeGPS?
91 components, from 53 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 RelativeGPS design files?
From the m-guihard/relativeGPS 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 RelativeGPS design in my own project?
The repository has no license, so all rights stay with m-guihard. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the RelativeGPS without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
Similar boards
STM32LumenPnP Motherboard
opulo-inc
149 × 95 mm296 parts4LCC-BY-SA-4.03.7k
STM32AxxSolder
AxxAxx
39 × 82.5 mm122 parts2LGPL-3.01.7k
STM32LibreVNA
jankae
122 × 98 mm592 parts6LGPL-3.01.6k
STM32AIOC
skuep
21 × 31.5 mm47 parts2LMIT1.4k
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
STM32176 pin board
rusefi
61.8 × 73.2 mm76 parts2LGPL-3.01.2k