Polo
About the Polo PCB
Polo is an open source STM32 PCB design by chinatsu, published on GitHub under the Custom license license. It is a 2-layer board measuring 58.7 × 39.7 mm, with 22 components from 12 distinct parts.
Its main chip is the STM32F042F6Px, from the STM32 family. Other key parts include the XC6206P332MR. By type, the board carries 8 capacitors, 6 switches, 3 resistors, 2 ICs, 1 transistor and 1 connector.
It belongs with the keyboards designs in this gallery.
Main components on the Polo
Polo bill of materials (BOM)
22 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F042F6Px | TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | XC6206P332MR | SOT-23-3 | U2 |
| 1 | AO3400A | SOT-23 | Q1 |
| 1 | Conn_01x04_MountingPin | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 6 | SW_Push | SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6 |
| 1 | SW_Push | SW_PUSH_1P1T_6x3.5mm_H4.3_APEM_MJTP1243 | SW_RESET1 |
| 2 | 100nF | C_0805_2012Metric | C3, C4 |
| 3 | 4.7uF | C_0805_2012Metric | C7, C10, C12 |
| 2 | 1uF | C_0805_2012Metric | C8, C9 |
| 1 | 470nF | C_0805_2012Metric | C11 |
| 2 | 10k | R_0805_2012Metric | R1, R3 |
| 1 | 100k | R_0805_2012Metric | R2 |
Polo design files
The KiCad project lives in the chinatsu/keyboards repository on GitHub; these links point at the commit this page was built from.
- Layoutpolo/polo/polo.kicad_pcb
- Schematicpolo/polo/polo.kicad_sch
Polo: common questions
What microcontroller does the Polo use?
The Polo is built around the STM32F042F6Px, from the STM32 family.
How big is the Polo PCB?
The Polo measures 58.7 × 39.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Polo?
22 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the Polo design files?
From the chinatsu/keyboards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Polo design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Polo 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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