HardLabs

Lyra alpha

PiKeeb·lyra-keyboard·pcb_design/lyra_alpha/lyra_alpha.kicad_pcb

Lyra alpha PCB layout, top view — open source AVR/Arduino board by PiKeeb

About the Lyra alpha PCB

Lyra alpha is an open source AVR/Arduino PCB design by PiKeeb, published on GitHub under the Custom license license. It is a 2-layer board measuring 322.3 × 82.1 mm, with 165 components from 25 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6. By type, the board carries 71 relays, 63 diodes, 8 capacitors, 7 switches, 6 resistors and 2 ICs.

It belongs with the keyboards designs in this gallery.

From the project

Lyra keyboard

Version: (5.99.0-10161-g3a96736b1f), release build

gerber folder for each board contains the files needed for PCB production.

Main components on the Lyra alpha

ATMEGA32U4-AUUSBLC6-2SC6

Lyra alpha bill of materials (BOM)

165 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4
Microchip Tech
U1
1
USBLC6-2SC6
STMicro
U2
1
X1E000021061300
XTAL_GND
Seiko Epson
X1
1
TYPE-C-31-M-12
HRO-TYPE-C-31-M-12
Korean HROparts
J1
1
ISP
J2
1
TLC-PSMD050
Polyfuse
TLC Electronic
F1
1
B7
H1
1
B0
H2
1
GND
H3
1
+5v
H4
71
CPG151101S11
KEYSW
Kailh
K1, K2, K3, K4, K5, K6, K7, K8 +63
1
Screw
S11
2
Screw
S12, S13
1
Screw
S14
2
Screw
S15, S16
1
K2-1187SQ-A4SW-06
SW_PUSH
Korean HROparts
SW1
62
CD4148WSP
D
LIZ Elec
D1, D2, D3, D4, D5, D6, D7, D8 +54
1
WS2812B-MINI
WS2812B
Worldsemi
D73
2
CL21C220JBANNNC
22p
Samsung Electro-Mechanics
C1, C2
1
CL21B105KBFNNNE
1u
Samsung Electro-Mechanics
C3
Show 5 more
QtyPartRefs
4
TCC0805X7R104K500DT
0.1u
CCTC
C4, C5, C6, C7
1
0805X475K500CT
4.7u
Walsin Tech Corp
C8
2
CR0805-FX-22R0ELF
22
BOURNS
R1, R2
2
0805W8J0512T5E
5.1k
UNI-ROYAL(Uniroyal Elec)
R3, R4
2
0805W8F1002T5E
10k
UNI-ROYAL(Uniroyal Elec)
R5, R6

Lyra alpha design files

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

Lyra alpha: common questions

What microcontroller does the Lyra alpha use?

The Lyra alpha is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the Lyra alpha PCB?

The Lyra alpha measures 322.3 × 82.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lyra alpha?

165 components, from 25 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 Lyra alpha design files?

From the PiKeeb/lyra-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 Lyra alpha design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Lyra alpha 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.

More boards in lyra-keyboard

Similar boards