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Macro pad

jonathanwpaul·macro-pad·electronics/MacroPad.kicad_pcb

Macro pad PCB layout, top view — open source AVR/Arduino board by jonathanwpaul

About the Macro pad PCB

Macro pad is an open source AVR/Arduino PCB design by jonathanwpaul, published on GitHub. It is a 2-layer board measuring 108 × 122 mm, with 58 components from 10 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. Other key parts include the SSD1306 and MCP73831T-2ACI/OT. By type, the board carries 26 switches, 24 diodes, 4 ICs, 2 capacitors, 1 battery holder and 1 resistor.

It belongs with the keyboards designs in this gallery.

From the project

Arduino Pro Micro HID device to control volume/macro buttons

Arduino Pro Micro HID device to act as a secondary keyboard for controlling volume and other functions, like a numpad

- use these components: - rotary encoder - cherry/kailh switches (I had browns laying around) - OLED screen - Arduino Pro Micro

- be cheapish (< $50 USD) - multiple layers of keybindings - easy to customize mappings

- You can safely ignore this, but you might notice there are a couple extra components on the PCB in the picture below. Those are for a 3 pin switch and an MCP73831 charging circuit. I included these for testing a charging circuit with a lithium ion cell and to…

Main components on the Macro pad

SSD1306ProMicroMCP73831T-2ACI/OT

Macro pad bill of materials (BOM)

58 components, 10 distinct parts.

QtyPartRefs
2
SSD1306
U1, U3
1
ProMicro
U2
1
MCP73831T-2ACI/OT
MCP73831T-2ACI_OT
U4
1
Battery
BT1
1
SW_Coded
SW0
24
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +16
1
SW_SPDT
SW25
24
LL4148
D1, D2, D3, D4, D5, D6, D7, D8 +16
2
4.7uF
C1, C2
1
2K
R2

Macro pad design files

The KiCad project lives in the jonathanwpaul/macro-pad repository on GitHub; these links point at the commit this page was built from.

Macro pad: common questions

What microcontroller does the Macro pad use?

The Macro pad is built around the ProMicro, from the AVR/Arduino family.

How big is the Macro pad PCB?

The Macro pad measures 108 × 122 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Macro pad?

58 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the Macro pad design files?

From the jonathanwpaul/macro-pad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Macro pad design in my own project?

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

Can I test firmware for the Macro pad 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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