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The PETER keyboard

calvin-mcd·the-PETER-keyboard·Project/the PETER keyboard.kicad_pcb

The PETER keyboard PCB layout, top view — open source AVR/Arduino board by calvin-mcd
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About the The PETER keyboard PCB

The PETER keyboard is an open source AVR/Arduino PCB design by calvin-mcd, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 243.3 × 95.4 mm, with 141 components from 24 distinct parts.

Its main chip is the ATmega32U4-M, from the AVR/Arduino family. By type, the board carries 59 diodes, 3 switches, 2 connectors, 1 IC and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

compact 60ish keyboard inspired by the 40s formfactor

compact 60ish keyboard inspired by 40s layouts & formfactors

I designed this keyboard after asking my friend Peter what his ideal keyboard would be. His answer was:"Ehm... I like numbers!". So I tried to make a board that keeps the functionality of a 60% keyboard while offering it in a 40s inspired form factor.

It takes inspiration from ai03’s UT47.2 and EODesigns\#4352’s Humble40 as well as trash man\#6005’s v4n4g0n and NoahK\#1290’s Monorail pcbs.

The PETER keyboard, from the project README
From the project README

Main components on the The PETER keyboard

ATmega32U4-M

The PETER keyboard bill of materials (BOM)

141 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATmega32U4-M
U1
1
Crystal_GND24_Small
Y1
1
USB_C_Receptacle_USB2.0
J1
1
AVR-ISP-6
J2
4
0.1uF
C_Decoupler1, C_Decoupler2, C_Decoupler3, C_Decoupler5
1
10uF
C_Decoupler4
1
1uF
C_UCAP1
1
4.7nF
C_USBSHIELD1
2
22pF
C_crystal1, C_crystal2
1
500mA
F_USBC1
49
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +41
2
MX-NoLED
MX24, MX37
4
MX-NoLED
MX25, MX36, MX49, MX51
1
MX-NoLED
MX52
1
MX-NoLED
MX53
1
MX-NoLED
MX54
2
10k
R_HWB/PE2, R_reset1
2
5.1k
R_USB1, R_USB2
2
22ohm
R_USB3, R_USB4
1
1M
R_USBSHIELD1
Show 4 more
QtyPartRefs
2
RotaryEncoder_Switch
SW1, SW12
1
SW_Push
SW2
58
C64898
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +50
1
PRTR5V0U2X
D59

The PETER keyboard design files

The KiCad project lives in the calvin-mcd/the-PETER-keyboard repository on GitHub; these links point at the commit this page was built from.

The PETER keyboard: common questions

What microcontroller does the The PETER keyboard use?

The The PETER keyboard is built around the ATmega32U4-M, from the AVR/Arduino family.

How big is the The PETER keyboard PCB?

The The PETER keyboard measures 243.3 × 95.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the The PETER keyboard?

141 components, from 24 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the The PETER keyboard design files?

From the calvin-mcd/the-PETER-keyboard repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the The PETER keyboard design in my own project?

Yes, under the terms of its GPL-3.0 license, which calvin-mcd chose for the repository.

Can I test firmware for the The PETER keyboard 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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