2 layers
Nrf bga
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12 parts14kMIT
2 layers32 × 25.5 mm
Hackxpansion
arghya-v/hackxpansion-controllerA custom SD card module with three buttons for music storage and controls, using Xpanse API for hardware/module integration.
- Size
- 32 × 25.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 18
- Pads
- 53
- Tracks, vias
- 103, 14
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Aug 2026
- Updated
- 11 Oct 2026
Overview
Hackxpansion is an open-source printed circuit board by arghya-v, from the arghya-v/hackxpansion-controller repository on GitHub. It is a 2-layer board of 32 × 25.5 mm with 12 parts on 18 nets, routed with 103 tracks and 14 vias.
Its parts include 5 resistors, 3 switches and 2 connectors.
README
README.mdhackxpansion module 1: SD Card Reader and Volume Control
Crates: pkg:cargo/SD_card_driver@0.1.1
A custom SD card module with three buttons for music storage and controls, using Xpanse API for hardware/module integration.
Images
Firmware
The firmware is responsible for communicating with the hardware.
The SD card is connected through SPI.
The current hardware mapping uses:
| GPIO | Function |
|---|---|
| GPIO2 | SPI SCK |
| GPIO3 | SPI MISO |
| GPIO4 | SPI MOSI |
| GPIO5 | Button A |
| GPIO6 | Button B |
| GPIO7 | Button X |
| GPIO9 | SD card CS |
See the Xpanse API docs
SD Card Filesystem
Its purpose is to abstract away the lower-level SD card communication so the application can work with files rather than dealing directly with SPI commands.
The filesystem layer provides functionality for:
- Opening the SD card
- Opening the first volume
- Opening the root directory
- Reading files
- Writing files
- Listing files in the root directory
- Closing directories and volumes
This is what the stack looks like:
SD Card
│
▼
SPI
│
▼
Xpanse SpiBusHandle
│
▼
embedded-sdmmc
│
▼
Filesystem
│
▼
ApplicationThis means the application itself does not need to know how the SD card communicates over SPI.
This was all possible thanks to Hackspansion: A hackclub YSWS
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 30k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | Micro_SD_Card_Det1 | lcsc_footprints:C381082_TF-SMD_XKTF-015-N | J2 |
| 1 | MountingHole_2.2mm_M2 | MountingHole:MountingHole_2.2mm_M2 | mount |
| 1 | ~ | Hackxpansion:Male_Module | J1 |
The 11 most common of 12 parts.
Questions
How big is the Hackxpansion PCB?
It measures 32 × 25.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackxpansion use?
12 parts. 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 Hackxpansion KiCad files?
From the arghya-v/hackxpansion-controller repository on GitHub, at the commit this page was made from: the board is kicad files/hackxpansion.kicad_pcb and its schematic kicad files/hackxpansion.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hackxpansion design in my own project?
Its repository states no licence, so its author keeps all rights: ask arghya-v before reusing the design.
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