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Edge key seventeen

wirehead·edge-key-seventeen

Edge key seventeen PCB layout, top view — open source AVR/Arduino board by wirehead

About the Edge key seventeen PCB

Edge key seventeen is an open source AVR/Arduino PCB design by wirehead, published on GitHub. It is a 2-layer board measuring 112.7 × 99.7 mm, with 74 components from 27 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. By type, the board carries 30 diodes, 14 LEDs, 10 resistors, 9 capacitors, 3 switches and 2 connectors.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

A 17 key numeric keypad with encoders

I like numeric keypads. They come in handy when I am working with CAD packages and stuff. So you can see this as a piece of quiet rebellion against the world of hipster 40% or 60% fancy keyboards but one that still gives you a durable, fancy, interesting, artisanal, hand-crafted, mechanically-keyed product at the end of it.

This is partially developed using Ruiqi Mao's Keyboard PCB guide as a reference... except that I'd suggest you don't actually use that guide as a reference because it's got some inaccuracies and at this point is old and unmaintained. It turns out that, because I was…

Main components on the Edge key seventeen

ATMEGA32U4

Edge key seventeen bill of materials (BOM)

74 components, 27 distinct parts.

QtyPartRefs
1
ATMEGA32U4
U1
1
16 MHz
Y1
1
USB_B_Micro
J1
1
AVR-ISP-6
J2
1
Polyfuse_Small
F1
1
MX-NoLED
MX1
2
MX-NoLED
MX8, MX15
1
Toggle switch
S1
2
Rotary_Encoder_Switch
SW1, SW2
13
MX-NoLED
MX2, MX3, MX4, MX5, MX6, MX7, MX9, MX10 +5
1
MX-NoLED
MX16
19
D_Small
D1, D2, D3, D4, D5, D6, D7, D9 +11
1
PRTR5V0U2X,215
PRTR5V0U2X_215
Nexperia USA Inc.
D8
9
SK6812
D19, D20, D21, D22, D23, D24, D25, D26 +1
1
LED
D30
2
22 pF
C1, C2
1
10 uF
C3
1
1 uF
C4
4
0.1 uF
C5, C6, C7, C8
1
4.7 nF
C10
Show 7 more
QtyPartRefs
1
1M
R1
2
22
R2, R3
1
10k
R4
1
10k
R5
2
5.1k
R6, R8
1
1 M
R7
2
330
R9, R10

Edge key seventeen design files

The KiCad project lives in the wirehead/edge-key-seventeen repository on GitHub; these links point at the commit this page was built from.

Edge key seventeen: common questions

What microcontroller does the Edge key seventeen use?

The Edge key seventeen is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the Edge key seventeen PCB?

The Edge key seventeen measures 112.7 × 99.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Edge key seventeen?

74 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Edge key seventeen design files?

From the wirehead/edge-key-seventeen repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Edge key seventeen design in my own project?

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

Can I test firmware for the Edge key seventeen without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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