HardLabs

Keyboard

RasmusB·USB-Keyboard-Adapter·PCB/Keyboard.kicad_pcb

Keyboard PCB layout, top view — open source AVR/Arduino board by RasmusB

About the Keyboard PCB

Keyboard is an open source AVR/Arduino PCB design by RasmusB, published on GitHub. It is a 2-layer board measuring 28 × 18 mm, with 27 components from 18 distinct parts.

Its main chip is the ATMEGA32U4-MU, from the AVR/Arduino family. By type, the board carries 12 capacitors, 5 resistors, 4 connectors, 1 IC, 1 crystal and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

An Psion to USB keyboard controller

An ATmega32u4 based keyboard controller. This was designed for use with a Psion Series 5mx keyboard, but should work for other keyboards also.

PCB contains KiCad files for the device itself Firmware/Psion-Keyboard-Firmware contains an Arduino sketch for the firmware * Firmware/ScanTheMatrix is a sketch for scanning the matrix of a keyboard. This is only meant as a tool to map a keyboard with an unknown pinout.

Main components on the Keyboard

ATMEGA32U4-MU

Keyboard bill of materials (BOM)

27 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-MU
ATMEGA32U4-QFN44
Microchip Tech
U1
1
ABM10W-16.0000MHZ-8-D1X-T3
16MHz
Abracon LLC
Y1
1
D-
J7
1
D+
J8
1
GND
J9
1
10118194-0001LF
USB_OTG
Amphenol ICC
P1
1
0603L100SLYR
500mA
Littelfuse
F1
1
AFC01-S22FCC-00
KEYBOARD-PSION-5MX
JUSHUO
KB1
1
SKRMAAE010
RESET
ALPSALPINE
SW1
1
XL-1005SURC
STATUS
XINGLIGHT
D1
2
CL05A105KA5NQNC
1uF
Samsung Electro-Mechanics
C1, C9
7
CL05B104KO5NNNC
100nF
Samsung Electro-Mechanics
C2, C3, C4, C5, C6, C7, C8
2
CC0402CRNPO9BN6R2
6.2pF
YAGEO
C10, C11
1
0402B472K500NT
4.7nF
FH(Guangdong Fenghua Advanced Tech)
C12
1
0402WGF1002TCE
10k
UNI-ROYAL(Uniroyal Elec)
R1
2
0402WGF220JTCE
22
UNI-ROYAL(Uniroyal Elec)
R2, R3
1
0402WGF1004TCE
1M
UNI-ROYAL(Uniroyal Elec)
R4
1
0402WGF1001TCE
1k
UNI-ROYAL(Uniroyal Elec)
R5

Keyboard design files

The KiCad project lives in the RasmusB/USB-Keyboard-Adapter repository on GitHub; these links point at the commit this page was built from.

Keyboard: common questions

What microcontroller does the Keyboard use?

The Keyboard is built around the ATMEGA32U4-MU, from the AVR/Arduino family.

How big is the Keyboard PCB?

The Keyboard measures 28 × 18 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

27 components, from 18 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 Keyboard design files?

From the RasmusB/USB-Keyboard-Adapter 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 Keyboard design in my own project?

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

Can I test firmware for the 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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