2 layers33.8 × 131 mm
MicrocontrollerInputModule
FrameworkComputer/InputModules
Reference designs and documentation for the Input Module system in the Framework Laptop 16
47 parts245
2 layers32 × 32.1 mm
SpringAdapter
FrameworkComputer/InputModules245Reference designs and documentation for the Input Module system in the Framework Laptop 16
- Size
- 32 × 32.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 12
- Pads
- 58
- Tracks, vias
- 82, 54
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 14 Nov 2022
- Updated
- 27 Sep 2026
Overview
SpringAdapter is an open-source printed circuit board by FrameworkComputer, from the FrameworkComputer/InputModules repository on GitHub. It is a 2-layer board of 32 × 32.1 mm with 18 parts on 12 nets, routed with 82 tracks and 54 vias.
It is built around the AP2112K-3.3. Its parts include 5 resistors, 2 capacitors, 2 connectors, 1 IC and 1 switch. It belongs with the computers and single-board computers boards of this library.
Main components
1README
Electrical/SpringAdapter/README.mdInput Module Adapter
This is a simple USB-C adapter to use and develop Input Modules outside of a Framework Laptop 16. Note that the actual pogo pin connector is a custom Framework part. We originally created this to enable Input Module development ahead of Framework Laptop 16 shipments starting. Now that Framework Laptop 16 has been available for a few years, this design is mostly for reference for anyone who wants to build projects around Input Modules.
License
Input Modules © 2023 by Framework Computer Inc is licensed under CC BY 4.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Assembly and Fabrication
We recommend using a 0.8mm PCB for this due to the specific USB-C connector we selected (for hand-solderability). To make Input Modules attach to the adapter, you can glue in 5mm x 2mm cylindrical magnets or glue on 5mm x 5mm x 1.2mm square magnets. You can use 6mm M2 fasteners as the alignment pins.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 2 | 0 | Resistor_SMD:R_1206_3216Metric | R4, R5 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | MountingHole | MountingHole:MountingHole_2.5mm | H3, H4 |
| 2 | MountingHole | MountingHole:MountingHole_5mm | H1, H2 |
| 1 | 5V | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | BOARD_ID | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | Conn_02x04_Odd_Even | SpringAdapter:BP33242_2x4_P2.0mm | J2 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | SW_DIP_x01 | Button_Switch_SMD:SW_DIP_SPSTx01_Slide_Omron_A6S-110x_W8.9mm_P2.54mm | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J1 |
Questions
How big is the SpringAdapter PCB?
It measures 32 × 32.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SpringAdapter use?
18 parts, built around the AP2112K-3.3. 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 SpringAdapter KiCad files?
From the FrameworkComputer/InputModules repository on GitHub, at the commit this page was made from: the board is Electrical/SpringAdapter/SpringAdapter.kicad_pcb and its schematic Electrical/LEDMatrix/Driver.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SpringAdapter design in my own project?
Its repository states no licence, so its author keeps all rights: ask FrameworkComputer before reusing the design.
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