2 layers75 × 75 mm
Simple
AndrewCromar/stepminia
Made in Kicad. Find the production files in the pcb folder to have it manufacured (JLCPCB).
7 parts
2 layers75 × 75 mm
RP2040 minimal r2
AndrewCromar/stepminiaMade in Kicad. Find the production files in the pcb folder to have it manufacured (JLCPCB).
- Size
- 75 × 75 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 34
- Nets
- 55
- Pads
- 166
- Tracks, vias
- 241, 33
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 Apr 2026
- Updated
- 2 Jun 2026
Overview
RP2040 minimal r2 is an open-source printed circuit board by AndrewCromar, from the AndrewCromar/stepminia repository on GitHub. It is a 2-layer board of 75 × 75 mm with 34 parts on 55 nets, routed with 241 tracks and 33 vias.
It is built around the RP2040, W25Q128JVSIQ and ABM8-272-T3. Its parts include 17 capacitors, 7 resistors, 4 switches, 3 ICs and 2 connectors. It belongs with the RP2040 boards of this library.
Main components
3
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
ABM8-272-T3
SMD3225-4P-40℃~+85℃ 10pF 12MHz 50Ω SMD crystal oscillator ±30ppm ±30ppm SMD3225-4P Crystals ROHSAbraconCrystals
README
README.mdStepminia
Desktop finger stepmania dance-pad.
Assebly instructions here.
PCB
Made in Kicad. Find the production files in the pcb folder to have it manufacured (JLCPCB).
You may notice the simple and integrated pcbs. This is because I wanted to learn how to integrate a microcontroller (rp2040) into my pcb design.. but when I went to have it made it was gonna cost $100! Its not that much but I have other things I wanna buy right now. So I made the simple version that just has holes for a Waveshare Zero to be soldered on.
Firmware
The firmware is in the firmware folder and there will likly be a compiled version of it also in that folder.
Wow really I had no clue the firmware would be in that folder bro.
CAD
Right now I'm making the cad stuff in OnShape so I dont have files for it. I'll download the stls and put them in the cad folder when I'm done with them.
I also my link to the OnShape files and/or download the files as solidworks parts if I can so people can make changes.
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C9, C11, C12, C13, C14, C15, C16 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C4, C17 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R5 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C8, C10 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | ABM8-272-T3 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | DDR_East | Andrews_Library:DDR_CONTACT | SW3 |
| 1 | DDR_North | Andrews_Library:DDR_CONTACT_MIRROR | SW1 |
| 1 | DDR_South | Andrews_Library:DDR_CONTACT | SW2 |
| 1 | DDR_West | Andrews_Library:DDR_CONTACT | SW4 |
| 1 | NCP1117-3.3_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | RP2040 | RP2040_minimal:RP2040-QFN-56 | U3 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U2 |
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Questions
How big is the RP2040 minimal r2 PCB?
It measures 75 × 75 mm and has 2 copper layers, 1 mm thick.
What parts does the RP2040 minimal r2 use?
34 parts, built around the RP2040, W25Q128JVSIQ and ABM8-272-T3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the RP2040 minimal r2 KiCad files?
From the AndrewCromar/stepminia repository on GitHub, at the commit this page was made from: the board is pcb/integrated/RP2040_minimal_r2.kicad_pcb and its schematic pcb/integrated/RP2040_minimal_r2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RP2040 minimal r2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask AndrewCromar before reusing the design.