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readme.md

Feegle XS Keyboard

More Information https://www.40percent.club/2020/11/feegle-xs.html

======================

Feegle XS keyboard. 12x4 matrix.

TMK Firmware https://git.40percent.club/di0ib/tmk_keyboard/src/branch/master/keyboard/feegle

Bootloader same as Aardvark https://git.40percent.club/di0ib/Misc/src/branch/master/aardvark/bootloader

Flashing bootloader with Arduino Uno https://www.40percent.club/p/arduino-isp-bootloader-flash.html

More info about V-USB https://www.40percent.club/2020/08/the-aardvark.html

Pre-trimming before soldering https://www.40percent.club/p/pre-trimming-components.html

Using SMT switches https://www.40percent.club/p/smt-conversion.html

Top

Feegle PCB Top

Gerber: top.zip

PCB Thickness: 1mm

Top Convertible

Feegle PCB Top convertible

Gerber: top_convertible.zip

PCB Thickness: 0.8mm

Top Grill

Feegle PCB Top grill

Gerber: top_grill.zip

PCB Thickness: 1mm

Top Aluminum

Feegle PCB Top single sided

Gerber: top_single.zip

PCB Thickness: 1mm

Bottom

Feegle PCB Bottom

Gerber: bottom.zip

PCB Thickness: 1mm

Bottom Aluminum

Feegle PCB Bottom single sided

Gerber: bottom_single.zip

PCB Thickness: 1mm

PCB mini USB

Feegle PCB

Gerber: feegle_xs.zip

PCB Thickness: 1.2mm

PCB USB C

Feegle C PCB

Gerber: feegle_xsc.zip

PCB Thickness: 1.2mm

Spacer

Feegle spacer

Gerber: spacer.zip

PCB Thickness: 0.8mm

License

Gerber files released under https://creativecommons.org/licenses/by-sa/4.0/

Creative Commons Attribution-ShareAlike 4.0 International License

Pinout

col: B0  B1  B2  C0  C1  C2  C3  C4  C5  D0  D1  B4
row: D6  D5  D3  B3

BOM mini USB

1   ATmega328p or ATmega328 28pin DIP
48  4.5x4.5 6-7mm tall tactile switches https://www.40percent.club/p/smt-conversion.html
1   4.5x4.5 5mm tall tactile switch (bootloader)
1   16MHz subminiature crystal ECS-160-20-46X
2   20pf capacitors 0.1" lead spacing, 4mm max height
1   1uf capacitor 0.1" lead spacing, 4mm max height
2   68ohm resistors. Smaller 1/8 or 1/10 watt
1   1.5Kohm resistor. Smaller 1/8 or 1/10 watt
1   PICO Fuse 0251.125MXL https://www.digikey.com/short/27hmbw0b
1   10uf capacitor 4mm diameter RNU1A100MDS1
1   Mini USB connector with 2 mounting lugs. 2 lugs can be trimmed off 4 lug versions.
2   T1 3mm Blue/White/Green/UV 3-3.3Vfd LEDs. Not all Green LEDs are 3V. Most Blue/White/UV are.
4   4mm M2 brass spacers
4   4mm M3 aluminum unthreaded spacers R30-6200414 (optional)
4   3mm M2 screws for top
4   5mm M2 screws for bottom
4   Steel or Brass 0.3mm thick washers
1   ISP programmer for initial bootloader flashing.

BOM USB C

same as XS with the addition of the 5.1k resistors and the USB C connector instead of mini USB.

1   ATmega328p or ATmega328 28pin DIP
48  4.5x4.5 6-7mm tall tactile switches https://www.40percent.club/p/smt-conversion.html
1   4.5x4.5 5mm tall tactile switch (bootloader)
1   16MHz subminiature crystal ECS-160-20-46X
2   20pf capacitors 0.1" lead spacing, 4mm max height
1   1uf capacitor 0.1" lead spacing, 4mm max height
2   68ohm resistors. Smaller 1/8 or 1/10 watt
2   5.1Kohm resistor. Smaller 1/8 or 1/10 watt
1   1.5Kohm resistor. Smaller 1/8 or 1/10 watt
1   PICO Fuse 0251.125MXL https://www.digikey.com/short/27hmbw0b
1   10uf capacitor 4mm diameter RNU1A100MDS1
1   USB C connector CU3216SASBLR004-NH https://www.digikey.com/short/4mpbjd7j
2   T1 3mm Blue/White/Green/UV 3-3.3Vfd LEDs. Not all Green LEDs are 3V. Most Blue/White/UV are.
4   4mm M2 brass spacers
4   4mm M3 aluminum unthreaded spacers R30-6200414 (optional)
4   3mm M2 screws for top
4   5mm M2 screws for bottom
4   Steel or Brass 0.3mm thick washers
1   ISP programmer for initial bootloader flashing.

Digikey - feegle xsc.xlsx

This list contains all the components from Digikey for the xsc. There are two different weight switches and an alternate USB C connector.

The only parts missing are the 4mm brass spacers and screws. These can be sourced from Amazon or eBay.

How to order your own PCBs