VR61 - MicroMod 60% Custom Keyboard PCB

Featuring SparkFun's MicroMod Processor Boards

Very happy to announce that PCBWay has gratefully sponsored the production of the first 5 RevA PCBs, and a partial assembly service (all but the USB-C, Hot-Swap Sockets, JST-ph4 & SK6812's), for this project. (I will post images and results of the prototype testing herein as I progress.)

Thank you PCBWay!

Please follow the updates to this production process on the updates page.

Published as Open Source, under MIT License:

Rev B

👍 WORKING, OK TO BUILD

PDF Schematic
EAGLE PCB
EAGLE Schematic
Notes:
- Keymap Working on both STM32 and PR2040
- (Optional EEPROM not tested yet)

Rev A

⚠ Do not use this revision, it has terminal flaws.

QMK code:

https://github.com/Tecsmith/vr61-keyboard-qmk
USB Identifier registered with pid.codes = 1209/7672

Layout

KLE link

Features

VR61-MicroMod - using SparkFun MicroMod STM32 or RP2040 M.2 module

Core Design Elements

60% form factor
- Design to be compatible with GH60/HK60 cases
- Also compatible with Anne Pro 2 cases (~~drop in~~ QMK replacement for existing AP2's or AP2 cases) [Removal of battery and minor case cut in the battery compartment required.]
- MicroMod positioned in case "battery compartment" space.
QMK + VIA default f/w
- Wired only (no wireless)
- Default key-maps for Mac users
User choice of microcontroller
- STM32 Processor
  - ARM Cortex-M4, 168MHz, 1MB Flash, 192kB SRAM
  - https://github.com/Tecsmith/vr61-keyboard-qmk
- RP2040 Processor
  - ARM Cortex-M0+, 133MHz, 128Mb Flash (16MB external), 264kB SRAM in six banks
USB-C (left side)

... but also optional JST connector for ai03 Unified C3 Daughterboard
ESD, Over Voltage and Over Current protection

... and cable shield noise filter
Hot-swap, 5 pin switch slots
PCB mounted stabs compatibility
Dual ANSI / ISO layout support
61-Key (ANSI) / 62-Key (ISO) Layout [1.25, 1.25, 1.25, 6.25, 1.25, 1.25, 1.25, 1.25] bottom row (a.k.a. "Poker" / "POK3R" Layout)
Limited RGB LEDs (SK6812 mini-E)
- RGB Caps Lock Indicator
- North facing RGB's under the 5, 6, 7 & 8 keys for layer indicator
- WS2812/SK6812 breakout for optional external LEDs
Spare GPIO pins (52 & 63) breakout for expansion

... e.g., ~~add speaker~~
Both [Reset] and [Boot] buttons (as per MicroMod ref. design)

... plus under space-bar Boot pins for bootload without disassembly (press while inserting cable for bootloader function)

Made with ♥ - Vino Rodrigues

Tecsmith/vr61-keyboard-pcb