2 layers243.9 × 136.5 mm
Barobord
sadekbaroudi/barobord
I have spent a lot of time and money designing prototypes, testing, developing, etc. Any contributions would be greatly appreciated!
157 parts57
2 layers304.8 × 119.9 mm
Macropad from scratch
paulmtn/macropad-from-scratchCreating a macropad from scratch starting with the PCB
- Size
- 304.8 × 119.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 194
- Nets
- 125
- Pads
- 888
- Tracks, vias
- 1,250, 146
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Dec 2025
- Updated
- 19 Oct 2026
Overview
Macropad from scratch is an open-source printed circuit board by paulmtn, from the paulmtn/macropad-from-scratch repository on GitHub. It is a 2-layer board of 304.8 × 119.9 mm with 194 parts on 125 nets, routed with 1,250 tracks and 146 vias.
It is built around the ATMEGA32U4-AU and PRTR5V0U2X. Its parts include 84 diodes, 65 switches, 8 capacitors, 6 resistors and 2 ICs. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdCreating a macropad from scratch starting with the PCB
Parts
194| Qty | Value | Footprint | References |
|---|---|---|---|
| 84 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +68 |
| 4 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C6, C7 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | ' | MX_Only:MXOnly-1U | SW58 |
| 1 | , | MX_Only:MXOnly-1U | SW69 |
| 1 | - | MX_Only:MXOnly-1U | SW28 |
| 1 | . | MX_Only:MXOnly-1U | SW70 |
| 1 | / | MX_Only:MXOnly-1U | SW71 |
| 1 | 0 | MX_Only:MXOnly-1U | SW27 |
| 1 | 1 | MX_Only:MXOnly-1U | SW18 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 2 | MX_Only:MXOnly-1U | SW19 |
| 1 | 3 | MX_Only:MXOnly-1U | SW20 |
| 1 | 4 | MX_Only:MXOnly-1U | SW21 |
| 1 | 5 | MX_Only:MXOnly-1U | SW22 |
| 1 | 500m | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | 6 | MX_Only:MXOnly-1U | SW23 |
| 1 | 60@100MHz | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | 7 | MX_Only:MXOnly-1U | SW24 |
| 1 | 8 | MX_Only:MXOnly-1U | SW25 |
| 1 | 9 | MX_Only:MXOnly-1U | SW26 |
| 1 | ; | MX_Only:MXOnly-1U | SW57 |
| 1 | = | MX_Only:MXOnly-1U | SW29 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U2 |
| 1 | AVR-ISP-6 | random-keyboard-parts:Reset_Pretty-Mask | J1 |
| 1 | Crystal_GND24_Small | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | PRTR5V0U2X | random-keyboard-parts:SOT143B | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_SKQG_WithStem | SW85 |
| 1 | [ | MX_Only:MXOnly-1U | SW43 |
| 1 | \ | MX_Only:MXOnly-1.5U | SW45 |
| 1 | ] | MX_Only:MXOnly-1U | SW44 |
| 1 | a | MX_Only:MXOnly-1U | SW48 |
| 1 | alt | MX_Only:MXOnly-1.25U | SW77 |
| 1 | alt | MX_Only:MXOnly-1U | SW79 |
| 1 | b | MX_Only:MXOnly-1U | SW66 |
| 1 | backspace | MX_Only:MXOnly-2U | SW30 |
| 1 | c | MX_Only:MXOnly-1U | SW64 |
| 1 | caps lock | MX_Only:MXOnly-1.75U | SW47 |
| 1 | ctrl | MX_Only:MXOnly-1.25U | SW75 |
| 1 | ctrl | MX_Only:MXOnly-1U | SW81 |
| 1 | d | MX_Only:MXOnly-1U | SW50 |
| 1 | delete/insert | MX_Only:MXOnly-1U | SW16 |
| 1 | down arrow | MX_Only:MXOnly-1U | SW83 |
| 1 | e | MX_Only:MXOnly-1U | SW35 |
| 1 | end | MX_Only:MXOnly-1U | SW74 |
| 1 | enter | MX_Only:MXOnly-2.25U | SW59 |
| 1 | esc | MX_Only:MXOnly-1U | SW1 |
| 1 | f | MX_Only:MXOnly-1U | SW51 |
| 1 | f1 | MX_Only:MXOnly-1U | SW2 |
| 1 | f10 | MX_Only:MXOnly-1U | SW11 |
| 1 | f11 | MX_Only:MXOnly-1U | SW12 |
| 1 | f12 | MX_Only:MXOnly-1U | SW13 |
| 1 | f2 | MX_Only:MXOnly-1U | SW3 |
| 1 | f3 | MX_Only:MXOnly-1U | SW4 |
| 1 | f4 | MX_Only:MXOnly-1U | SW5 |
| 1 | f5 | MX_Only:MXOnly-1U | SW6 |
| 1 | f6 | MX_Only:MXOnly-1U | SW7 |
| 1 | f7 | MX_Only:MXOnly-1U | SW8 |
| 1 | f8 | MX_Only:MXOnly-1U | SW9 |
| 1 | f9 | MX_Only:MXOnly-1U | SW10 |
| 1 | fn | MX_Only:MXOnly-1U | SW80 |
| 1 | g | MX_Only:MXOnly-1U | SW52 |
| 1 | h | MX_Only:MXOnly-1U | SW53 |
| 1 | home | MX_Only:MXOnly-1U | SW31 |
| 1 | i | MX_Only:MXOnly-1U | SW40 |
| 1 | j | MX_Only:MXOnly-1U | SW54 |
| 1 | k | MX_Only:MXOnly-1U | SW55 |
| 1 | l | MX_Only:MXOnly-1U | SW56 |
| 1 | left arrow | MX_Only:MXOnly-1U | SW82 |
| 1 | m | MX_Only:MXOnly-1U | SW68 |
| 1 | n | MX_Only:MXOnly-1U | SW67 |
| 1 | o | MX_Only:MXOnly-1U | SW41 |
| 1 | p | MX_Only:MXOnly-1U | SW42 |
| 1 | page down | MX_Only:MXOnly-1U | SW60 |
| 1 | page up | MX_Only:MXOnly-1U | SW46 |
The 170 most common of 194 parts.
Questions
How big is the Macropad from scratch PCB?
It measures 304.8 × 119.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Macropad from scratch use?
194 parts, built around the ATMEGA32U4-AU and PRTR5V0U2X. 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 Macropad from scratch KiCad files?
From the paulmtn/macropad-from-scratch repository on GitHub, at the commit this page was made from: the board is macropad-from-scratch.kicad_pcb and its schematic macropad-from-scratch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Macropad from scratch design in my own project?
Its repository states no licence, so its author keeps all rights: ask paulmtn before reusing the design.
Similar boards
- 2 layers217.7 × 91.1 mm
- 2 layers298.8 × 122 mm
Ursaminor pcb
markstory/ursa-minor-keyboard
Design and schematics for the ursaminor keyboard
225 parts23 - 2 layers285.5 × 112.1 mm
- 2 layers242.3 × 75.4 mm
- 2 layers333.4 × 88.6 mm
Reverie
makenova/reverie
a mini 1800 keyboard based on the Elongate, Clarabelle, and Garbage Truck Keyboards
140 parts14 - 2 layers281.8 × 166.9 mm
Micro redox semi split
makenova/micro_redox
A family of boards inspired by the microdox and ferris
96 parts13 - 2 layers276.2 × 79.8 mm
