Xiao Macropad

A 3 key macropad, mostly just to Copy and Paste. But you do whatever you want to do.

Table of Contents

• Materials Needed
• Software Needed
• Features
• Setup
• Print Case
• Progression

Materials needed

Soldering Required

Item	Link	Quantity	Price
Seeduino Xiao	Amazon	1	$9.50
Peel-A-Way Sockets	ringerkeys.com	2 (Strips of 12)	$4.00
Mechanical Switches	Amazon	1 (pack of 10)	$12.99
Key Caps	Amazon	1 (pack of 10)	$7.01
OLED Screen (128x32)	Amazon	1 (pack of 2)	$7.99
PCB	JLCPCB	5 minimum	$5.00
M3*6 Screws	Amazon	4	$12.79
M3*6+6 Standoffs	Amazon	4	$12.79
M3 Nuts	Amazon	4	$12.79

Software Needed

• Arduino
• Seeed SAMD Boards
  • https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json
  • Select the board: Tools -> Boards Manager and search seeeduino xiao. Select the Seeed SAMD Boards.
  • Xiao Setup help
• #include
  • Arduino.h
  • HID-Project.h
  • ezButton.h
  • UG82lib.h

Features

Using HID-Project you can have whatever macros you want set to any of the keys. I used CTL-A, CTL-C, CTL-V.

The screen displays what each button does (Because it's hard to remember 3 things).

Setup

1. Order the PCBs using the gerber file.
   • It's a .zip file that you upload to JLCPCB and choose your parameters. Here's their How to Order video.
   • 
2. Solder the sockets to the PCB
   • CannonKeys has instructions for soldering the Peel-A-Way sockets.
3. Solder pins to the Xiao
   • Instead of square headers on the Xiao use legs from resistors or diodes to fit into the sockets.
   • 
4. (Optional) Solder the OLED screen
   • The screen is optional if you want to avoid the headache of OLED burn in.
5. Solder on the switches
   • I didn't see a need to make them hot swapable, it's only 3 of them. And I don't have a way to design a plate mounted setup right now.
6. Add the key caps
7. Program the Xiao
   • macro_pad_V1.ino - Doesn't have the OLED programmed
   • macro_pad_V2.ino - Has the OLED programmed

Case

• 

STL in the Case folder.

Designed the case in FreeCad

• Printer: Ender 3 pro
• Material: PLA
• Layer hight: 0.28

Designs

Version 1.1	Version 1.2	Version 1.3
Version 2.1	Version 2.2	Version 2.3