keyboard/hardware/itsy_bitsy_adapter
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LICENSE.md Rearrange folder layout now that upstream projects aren't mirrored inside this repo 2021-01-05 07:17:41 -05:00
README.md Rearrange folder layout now that upstream projects aren't mirrored inside this repo 2021-01-05 07:17:41 -05:00
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README.md

KMK Hardware: Devices for use with KMK

Forked from https://github.com/KMKfw/kmk_firmware

Itsy Bitsy to Pro Micro pinout adapter

This board adapts the pinout of a Circuit Python compatible Adafruit Itsy Bitsy M4 Express to that of the Sparkfun Pro Micro to allow the Itsy Bitsy to be used with the many keyboards that support the footprint of the Pro Micro.

Pin mapping

Pro Micro Pin Itsy Bitsy Pin
TX0/PD3 TX
RX1/PD2 RX
GND GND
GND GND
2/PD1 SDA
3/PD0 SCL
4/PD4 D13
5/PC6 D12
6/PD7 D11
7/PE6 D10
8/PB4 D9
9/PB5 D7
Raw
GND GND
RST RST
VCC USB
A3/PF4 A0
A2/PF5 A1
A1/PF6 A2
A0/PF7 A3
15/PB1 A4
14/PB3 A5
16/PB2 SCK

So how do I use it?

  1. The pads for the Pro Micro footprint are circled on the underside of the board. Solder male headers into these pads on the underside of the board (the same side as the markings) so that the pins extend "downward" so that they can be plugged into the keyboard.

  2. The remaining pads are for the Itsy Bitsy. Assuming height is a concern, rather than soldering male headers into the Itsy Bitsy and female headers into the adapter board, instead place the long side of male headers through the Itsy Bitsy pads from underneath the board so that they protrude through he pads on the top of the board and solder them in place. Make sure to keep the headers perpindicular to the surface of the board.

  3. Once soldered, place the Itsy Bitsy board over the headers that are now protruding upwards so that the headers go through the pads of the ItsyBitsy and solder in place.

  4. Trim the ItsyBitsy headers as needed with flush cutters.

The files in this directory are licensed CC BY-SA 4.0 while the tl;dr is linked, the full license text is included in LICENSE.md in this directory.