HardLabs

N31

hatanoh·30p·KiCAD/bootleg31-iso/n31.kicad_pcb

N31 PCB layout, top view — open source board by hatanoh

About the N31 PCB

N31 is an open source PCB design by hatanoh, published on GitHub. It is a 2-layer board measuring 241.7 × 61.9 mm, with 81 components from 15 distinct parts.

Other key parts include the BLE-Micro-Pro-2 and TPS61221. By type, the board carries 37 diodes, 35 switches, 2 ICs, 2 capacitors, 1 battery holder and 1 inductor.

It belongs with the keyboards designs in this gallery.

From the project

my various 30% keyboards

キーボードとしての基本的な動作には問題がないことは確認していますが、多少ネジ穴位置や組み立て難易度に難があります。

トッププレート裏にBMPを配置しているのでProMicroを重ねないタイプの普通のキーボードぐらいの厚さ(7mmスペーサー使用)になっています (Bootleg31除く/Bootleg31は11mm)

N31, from the project README
From the project README

Main components on the N31

BLE-Micro-Pro-2TPS61221

N31 bill of materials (BOM)

81 components, 15 distinct parts.

QtyPartRefs
1
BLE-Micro-Pro-2
U1
1
TPS61221
U2
1
Battery_Cell
BT1
3
MountingHole
H1, H2, H3
18
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +10
10
SW_Push
SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19 +2
1
SW_Push
SW22
1
SW_Push
SW23
1
SW_Push
SW31
2
TMHU27
SW32, SW33
1
SW_RST
SW34
1
SW_PWR
SW35
37
D
D1, D2, D3, D4, D5, D6, D7, D8 +29
1
4.7uH
L1
2
10uF
C1, C2

N31 design files

The KiCad project lives in the hatanoh/30p repository on GitHub; these links point at the commit this page was built from.

N31: common questions

How big is the N31 PCB?

The N31 measures 241.7 × 61.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the N31?

81 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the N31 design files?

From the hatanoh/30p repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the N31 design in my own project?

The repository has no license, so all rights stay with hatanoh. Use it as a reference, and ask the author before reusing the design.

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