X1
About the X1 PCB
X1 is an open source STM32 PCB design by embeddedalpha, published on GitHub under the MIT license. It is a 2-layer board measuring 30 × 80 mm, with 57 components from 21 distinct parts.
Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the CY7C65213A-32LTXI, TXB0104D, TXB0108PWR, W25Q64FV and MPU-9150. By type, the board carries 25 capacitors, 11 diodes, 8 ICs, 6 connectors, 4 resistors and 2 crystals.
It belongs with the sensors and dev boards & breakouts designs in this gallery.
From the project
Repository for PCB Design Projects
Main components on the X1
X1 bill of materials (BOM)
57 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F103C8Tx | LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | CY7C65213A-32LTXI | LQFP-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U2 |
| 1 | TXB0104D | SOIC-14_3.9x8.7mm_P1.27mm | U3 |
| 1 | TXB0108PWR | TSSOP-20_W4.4mm | U4 |
| 1 | W25Q64FV | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | MPU-9150 | QFN-24-1EP_3x3mm | U6 |
| 1 | BME680 | Bosch_LGA-8_3x3mm_P0.8mm_ClockwisePinNumbering | U7 |
| 1 | LF33_TO220 | SOT-23 | U8 |
| 2 | Crystal_GND23_Small | Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1, Y2 |
| 2 | USB_B_Micro | USB_Micro-B_Molex_47346-0001 | J5, J6 |
| 1 | Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P2.54mm_Vertical | J7 |
| 1 | Conn_02x03_Counter_Clockwise | PinHeader_2x03_P2.54mm_Vertical | J8 |
| 2 | Conn_01x20 | PinHeader_1x20_P2.54mm_Vertical | J9, J10 |
| 1 | GPTS203211B | SW_SPST_TL3342 | S1 |
| 6 | 1.5KExxA | R_0201_0603Metric | D1, D2, D3, D4, D5, D6 |
| 2 | DIODE | R_0201_0603Metric | D7, D8 |
| 3 | LED | LED_0201_0603Metric | D9, D10, D11 |
| 12 | C_Small | C_0201_0603Metric | C1, C3, C4, C10, C13, C14, C15, C16 +4 |
| 7 | 10N | C_0201_0603Metric | C6, C7, C8, C9, C12, C21, C22 |
| 6 | 0.1U | C_0201_0603Metric | C23, C25, C26, C29, C33, C34 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | R | R_0201_0603Metric | R1, R2, R3, R4 |
X1 design files
The KiCad project lives in the embeddedalpha/PCB-Design repository on GitHub; these links point at the commit this page was built from.
X1: common questions
What microcontroller does the X1 use?
The X1 is built around the STM32F103C8Tx, from the STM32 family.
How big is the X1 PCB?
The X1 measures 30 × 80 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the X1?
57 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the X1 design files?
From the embeddedalpha/PCB-Design repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the X1 design in my own project?
Yes, under the terms of its MIT license, which embeddedalpha chose for the repository.
Can I test firmware for the X1 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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