Dorji gps
About the Dorji gps PCB
Dorji gps is an open source STM32 PCB design by coffee-and-telesense, published on GitHub. It is a 2-layer board measuring 70.9 × 70.4 mm, with 86 components from 58 distinct parts.
Its main chip is the STM32L432KBUx, from the STM32 family. Other key parts include the ADP5091, TPS61023DRLR, DRA818V, LM386 and MAX-M10M-00B. By type, the board carries 30 resistors, 25 capacitors, 13 connectors, 6 ICs, 6 inductors and 3 transistors.
It belongs with the rf & radio designs in this gallery.
Main components on the Dorji gps
Dorji gps bill of materials (BOM)
86 components, 58 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADP5091 | LFCSP-24-1EP_4x4mm_P0.5mm_EP2.3x2.3mm | U1 |
| 1 | TPS61023DRLR | DRL0006A | U2 |
| 1 | DRA818V | DORJI_DRA818V | U3 |
| 1 | LM386 | DIP-8_W7.62mm_Socket | U4 |
| 1 | MAX-M10M-00B | MOD18_MAX-M10M_UBL | U5 |
| 1 | STM32L432KBUx | QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U6 |
| 3 | BSS84 | SOT-23 | Q1, Q2, Q3 |
| 1 | Solar Panel | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | I2C_3V3 | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | BATT | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | USB_B_Micro | USB_Micro-B_Amphenol_10118194-0001LF_Horizontal | J4 |
| 1 | Conn_Coaxial | SMA_Molex_73251-2120_EdgeMount_Horizontal | J5 |
| 1 | 3V3 Sensor Bus | PinHeader_1x02_P2.54mm_Vertical | J7 |
| 5 | Conn_01x01_Socket | PinHeader_1x01_P2.54mm_Vertical | J9, J10, J11, J12, J14 |
| 1 | I2C_5V | PinSocket_1x02_P2.54mm_Vertical | J13 |
| 1 | SWD | PinHeader_1x02_P2.54mm_Vertical | J16 |
| 1 | Antenna | AC30157-01 GNSS Ceramic Chip | AE1 |
| 1 | BOOT_DFU | SW_Push_1P1T_NO_6x6mm_H9.5mm | SW3 |
| 1 | RST | SW_Push_1P1T_NO_6x6mm_H9.5mm | SW4 |
| 1 | 22u | L_0603_1608Metric | L1 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1u | L_0603_1608Metric | L2 |
| 2 | 47nH | L_0603_1608Metric | L3, L5 |
| 1 | 68nH | L_0603_1608Metric | L4 |
| 1 | 2.0n | L_0603_1608Metric | L6 |
| 2 | 10n | C_0603_1608Metric | C1, C12 |
| 3 | 10u | C_0603_1608Metric | C2, C5, C8 |
| 1 | 0.1u | C_0603_1608Metric | C3 |
| 1 | 4.7u | C_0603_1608Metric | C4 |
| 10 | 100n | C_0603_1608Metric | C6, C7, C11, C14, C15, C16, C17, C18 +2 |
| 1 | 10nF | C_0603_1608Metric | C9 |
| 2 | 20pF | C_0603_1608Metric | C10, C13 |
| 1 | 50n | C_0603_1608Metric | C21 |
| 1 | 250u | C_1210_3225Metric | C22 |
| 2 | DNP | C_0603_1608Metric | C23, C24 |
| 1 | 10p | C_0603_1608Metric | C25 |
| 1 | 55.6k | R_0603_1608Metric | R1 |
| 1 | 150k | R_0603_1608Metric | R2 |
| 1 | 6.98M | R_0603_1608Metric | R3 |
| 1 | 499k | R_0603_1608Metric | R4 |
| 1 | 2.67M | R_0603_1608Metric | R5 |
| 1 | 7.15M | R_0603_1608Metric | R6 |
| 1 | 8.45M | R_0603_1608Metric | R7 |
| 1 | 4.7M | R_0603_1608Metric | R8 |
| 1 | 18M | R_0603_1608Metric | R9 |
| 1 | 4.32M | R_0603_1608Metric | R10 |
| 1 | 9.76M | R_0603_1608Metric | R11 |
| 4 | 10k | R_0603_1608Metric | R12, R15, R26, R27 |
| 1 | 4.99M | R_0603_1608Metric | R13 |
| 1 | 10.2M | R_0603_1608Metric | R14 |
| 2 | 330 | R_0603_1608Metric | R16, R18 |
| 1 | 10M | R_0603_1608Metric | R17 |
| 2 | 3.3k | R_0603_1608Metric | R19, R22 |
| 1 | 1.47M | R_0603_1608Metric | R20 |
| 1 | 200k | R_0603_1608Metric | R21 |
| 1 | 10 | R_0603_1608Metric | R23 |
| 3 | 0 | R_0603_1608Metric | R24, R28, R30 |
| 1 | 1M | R_0603_1608Metric | R25 |
| 1 | 100k | R_0603_1608Metric | R33 |
Dorji gps design files
The KiCad project lives in the coffee-and-telesense/PicoAPRS repository on GitHub; these links point at the commit this page was built from.
Dorji gps: common questions
What microcontroller does the Dorji gps use?
The Dorji gps is built around the STM32L432KBUx, from the STM32 family.
How big is the Dorji gps PCB?
The Dorji gps measures 70.9 × 70.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dorji gps?
86 components, from 58 distinct parts. The full bill of materials is listed on this page.
Where can I download the Dorji gps design files?
From the coffee-and-telesense/PicoAPRS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Dorji gps design in my own project?
The repository has no license, so all rights stay with coffee-and-telesense. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Dorji gps 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.
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