2 layers285.8 × 123.8 mm Donegal c, the printed circuit board in 3D

Donegal c

a fork of the gingham keyboard pcb which keeps the iso 60% layout but drops the i/o expander.

Size: 285.8 × 123.8 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 181
Nets: 99
Pads: 679
Tracks, vias: 1,415, 62
Pours: 3
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 20 Dec 2020
Updated: 7 Dec 2022

Overview

Donegal c is an open-source printed circuit board by piit79, from the piit79/donegal-c repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 285.8 × 123.8 mm with 181 parts on 99 nets, routed with 1,415 tracks and 62 vias.

It is built around the ATMEGA328-PU. Its parts include 82 switches, 68 diodes, 8 resistors, 5 capacitors and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.

Main components

ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)

README

README.md

Donegal-C PCB Render

Donegal-C

A fork of the gingham keyboard by Yiancar.

Modified by gipetto to add ABNT2 layout and drop the I/O expander and vias.

Further modified and refined by piit79 with the following improvements:

Use USB-C instead of USB Mini
Add support for more layouts:
- Stepped/normal Caps Lock
- Tsangan bottom row
- Split spacebar (I/O pins shared with OLED)
Drop Alps support (to avoid large switch pin holes)
Add OLED support (I/O pins shared with split spacebar)

Category and platform

Keyboards and input AVR (ATmega, ATtiny)

Project files

Show this board on your page

https://pcbkit.io/boards/piit79-donegal-c

The board's own page, for a message or a post.

Source

Repository: piit79/donegal-c
Board file: donegal-c.kicad_pcb
Commit: 3fd31fa
Licence: GPL-3.0

Parts

181

Qty	Value	Footprint	References
66	D	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D2, D10, D11, D12, D13, D14, D15, D17, D18, D19, D20, D21, D22, D23, D24, D161 +50
54	SW_SPST	MX_Only:MXOnly-1U-NoLED	SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24, SW25 +38
10	MountingHole_Pad	MountingHole:MountingHole_2.2mm_M2_DIN965_Pad	H1, H2, H3, H4, H5, H6, H7, H8, H9, H10
10	SW_SPST	MX_Only:MXOnly-1.25U-NoLED	SW60, SW61, SW62, SW64, SW65, SW66, SW67, SW70, SW72, SW81
6	SW_SPST	MX_Only:MXOnly-1.5U-NoLED	SW16, SW43, SW73, SW75, SW78, SW79
4	5.1k	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R4, R5, R7, R8
2	100n	Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm	C2, C3
2	22p	Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm	C4, C5
2	3.6V	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D115, D116
2	75R	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R2, R3
2	SW_SPST	MX_Only:MXOnly-2.25U-NoLED	SW44, SW46
1	1.5K	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R1
1	10K	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R6
1	16MHZ	Crystal:Crystal_HC49-4H_Vertical	Y1
1	4.7uF	Capacitor_THT:CP_Radial_D4.0mm_P1.50mm	C1
1	500 mA	Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm	F1
1	ATmega328-PU	Package_DIP:DIP-28_W7.62mm	U1
1	BOOT	Button_Switch_THT:SW_PUSH_6mm	SW69
1	Gingham	tartan:gingham	PATTERN1
1	ISP	Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical	J2
1	MountingHole	MountingHole:MountingHole_2.2mm_M2	H11
1	OLED	42keebs:OLED_v2.1	OLED1
1	RESET	Button_Switch_THT:SW_PUSH_6mm	SW68
1	SW_SPST	MX_Only:MXOnly-2.75U-ReversedStabilizers-NoLED	SW80
1	SW_SPST	MX_Only:MXOnly-2U-NoLED	SW1
1	SW_SPST	MX_Only:MXOnly-7U-ReversedStabilizers-NoLED	SW76
1	SW_SPST	MX_Only:MXOnly-2.75U-NoLED	SW45
1	SW_SPST	MX_Only:MXOnly-ISO-ROTATED-ReversedStabilizers-NoLED	SW30
1	SW_SPST	MX_Only:MXOnly-6.25U-ReversedStabilizers-NoLED	SW63
1	SW_SPST	MX_Only:MXOnly-1.75U-NoLED	SW31
1	SW_SPST	MX_Only:MXOnly-2.25U-ReversedStabilizers-NoLED	SW82
1	USB_C_GCT_USB4085	42keebs:USB_C_GCT_USB4085-offset-pads	USB1

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Questions

How big is the Donegal c PCB?

It measures 285.8 × 123.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Donegal c use?

181 parts, built around the ATMEGA328-PU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Donegal c KiCad files?

From the piit79/donegal-c repository on GitHub, at the commit this page was made from: the board is donegal-c.kicad_pcb and its schematic donegal-c.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Donegal c design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).