4 layers30 × 64 mm
2 layers30 × 64 mm
Keymatrix
melair/ktane5Keep Talking and Nobody Explodes - Physical Edition
- Size
- 30 × 64 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 64
- Pads
- 208
- Tracks, vias
- 468, 82
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Apr 2021
- Updated
- 21 Oct 2026
Overview
Keymatrix is an open-source printed circuit board by melair, from the melair/ktane repository on GitHub. It is a 2-layer board of 30 × 64 mm with 54 parts on 64 nets, routed with 468 tracks and 82 vias.
It is built around the 74HC4051. Its parts include 40 diodes, 6 connectors, 5 resistors, 1 capacitor and 1 IC.
Main components
1README
README.mdKeep Talking and Nobody Explodes - Physical Version
Version Two
This is version two of my Keep Talking and Nobody Explodes physical bomb, you may refer to the version-one branch if you wish to see the first version progress.
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | D_Small | Diode_SMD:D_0603_1608Metric | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +24 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 74HC4051 | Package_DFN_QFN:DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm | U1 |
| 1 | Col0 | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J10 |
| 1 | Col1 | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J11 |
| 1 | Col2 | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J12 |
| 1 | Col3 | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J13 |
| 1 | Col4 | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J14 |
| 1 | In | KTANE:KTANE Submodule Connector V2 - Short | J1 |
| 1 | LOGO | KTANE:KTANEIRL-0505 | G*** |
Questions
How big is the Keymatrix PCB?
It measures 30 × 64 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Keymatrix use?
54 parts, built around the 74HC4051. 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 Keymatrix KiCad files?
From the melair/ktane repository on GitHub, at the commit this page was made from: the board is PCB/Modules/Keymatrix/Keymatrix.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keymatrix design in my own project?
Its repository states no licence, so its author keeps all rights: ask melair before reusing the design.
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