2 layers27.9 × 16.5 mm
2 layers43.1 × 51.4 mm
Gpio expander
dazemc/mcp23017KiCad mcp23017 based GPIO expander board with JST headers and addressable dip switch
- Size
- 43.1 × 51.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 28
- Pads
- 91
- Tracks, vias
- 262, 17
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 26 Oct 2026
- Updated
- 26 Oct 2026
Overview
Gpio expander is an open-source printed circuit board by dazemc, from the dazemc/mcp23017 repository on GitHub. It is a 2-layer board of 43.1 × 51.4 mm with 18 parts on 28 nets, routed with 262 tracks and 17 vias.
Its parts include 8 resistors, 2 capacitors, 2 connectors, 1 IC and 1 switch.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R7 |
| 4 | MountingHole_2.1mm | MountingHole:MountingHole_2.1mm | 2.1mm, 2.1mm, 2.1mm, 2.1mm |
| 2 | 4.3k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9 |
| 1 | 1.0nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 1.0uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | Conn_01x07 | Connector_JST:JST_PH_B7B-PH-K_1x07_P2.00mm_Vertical | J1 |
| 1 | Conn_01x16 | Connector_JST:JST_PH_B16B-PH-K_1x16_P2.00mm_Vertical | J2 |
| 1 | MCP23017x-x-ML | Package_DFN_QFN:QFN-28-1EP_6x6mm_P0.65mm_EP4.25x4.25mm | U1 |
| 1 | SW_DIP_x03 | 206-3ST:2063ST | SW1 |
Questions
How big is the Gpio expander PCB?
It measures 43.1 × 51.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Gpio expander use?
18 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 Gpio expander KiCad files?
From the dazemc/mcp23017 repository on GitHub, at the commit this page was made from: the board is gpio_expander.kicad_pcb and its schematic gpio_expander.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Gpio expander design in my own project?
Its repository states no licence, so its author keeps all rights: ask dazemc before reusing the design.
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