HardLabs

Orch

htpkbs·orch·pcb/orch.kicad_pcb

Orch PCB layout, top view — open source AVR/Arduino board by htpkbs
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About the Orch PCB

Orch is an open source AVR/Arduino PCB design by htpkbs, published on GitHub under the BSD-2-Clause license. It is a 2-layer board measuring 313.6 × 83.8 mm, with 155 components from 22 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. By type, the board carries 68 diodes, 61 switches, 16 capacitors, 6 resistors, 1 IC and 1 crystal.

It belongs with the keyboards and usb & debug tools designs in this gallery.

From the project

A mostly ortholinear keyboard PCB that fits GMK keycaps.

A mostly ortholinear layout Key sizes that fit most GMK keycap sets 1.25u super/meta/command keys 19mm switch spacing An arrow key cluster A function key column USB-C A rotary encoder No stabilizers unless you want one for a 2U spacebar Optional 2U spacebar or 2 1U keys

The key layout looks like this. (Thanks to Keyboard Layout Editor for the image.)

This is the corresponding data for pasting into Keyboard Layout Editor:

Orch, from the project README
From the project README

Main components on the Orch

ATMEGA32U4-AU

Orch bill of materials (BOM)

155 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4-AU
U1
1
16MHZ
16MHz
Y1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
P1
1
100MA
100mA
F1
2
MX-NoLED
SW1, SW54
3
MX-NoLED
SW2, SW3, SW51
50
MX-NoLED
SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11 +42
3
MX-NoLED
SW16, SW37, SW48
1
MX-NoLED
SW25
1
Rotary_Encoder_Switch
SW55
1
Reset
SW61
60
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +52
6
SK6812
D61, D62, D63, D64, D65, D66
2
SK6812
D67, D68
2
22PF
22pF
C1, C2
1
4.7U
4.7u
C3
10
0.1U
0.1u
C4, C5, C6, C7, C8, C9, C10, C11 +2
2
0.1u
C14, C15
1
1u
C16
2
10K
R1, R6
Show 2 more
QtyPartRefs
2
22R
R2, R3
2
5.1K
5.1k
R4, R5

Orch design files

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

Orch: common questions

What microcontroller does the Orch use?

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

How big is the Orch PCB?

The Orch measures 313.6 × 83.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Orch?

155 components, from 22 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 Orch design files?

From the htpkbs/orch repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Orch design in my own project?

Yes, under the terms of its BSD-2-Clause license, which htpkbs chose for the repository.

Can I test firmware for the Orch 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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