https://github.com/cipulot/ec23u

Open source numpad Electrostatic Capacitive PCB.
https://github.com/cipulot/ec23u

keyboard qmk-firmware topre vial

Last synced: 3 months ago
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Open source numpad Electrostatic Capacitive PCB.

• Host: GitHub
• URL: https://github.com/cipulot/ec23u
• Owner: Cipulot
• License: other
• Created: 2022-11-10T12:02:44.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-06-05T10:05:29.000Z (12 months ago)
• Last Synced: 2025-01-19T22:50:05.367Z (4 months ago)
• Topics: keyboard, qmk-firmware, topre, vial
• Homepage:
• Size: 34.1 MB
• Stars: 14
• Watchers: 1
• Forks: 5
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md

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README

        
# EC23U

Open source numpad Electrostatic Capacitive PCB.

## Introduction

This project is a continuation of my development of open source EC boards.

The supported layout options are the following:

![Layout option](/Assets/Layout_option.png)

## Technical information

- Layout size: 23U layouts with alternative options

- Compatible switches: EC switches (Topre and NIZ)

- Microcontroller: STM32F401

- Connector: Original OEM JST connector

- Firmware compatibility: QMK (with VIA/VIAL support)

- Protection hardware (present on both the mainboard and both controller versions):

  - Fused

  - ESD protection

- Addressable RGB LED support

- Numlock LED support

## Renders and Prototypes

### Render

![PCB Front Render](/Assets/PCB_render_front.png)

![PCB Back Render](/Assets/PCB_render_back.png)

### Prototypes

![PCB Front](/Assets/PCB_front.png)

![PCB Back](/Assets/PCB_back.png)

**NOTE**: The silkscreen text near the JST connector has the `GND` and `VBUS` label swapped. This is wrong and have been fixed in the latest revision.

## Revisions and relative features

### Rev1.0

This revision implements all the main features of the mainboard ad controllers mentioned in the specifications.

#### RGB header

![RGB header](/Assets/rgb_header.png)

The mainboard features an RGB header for connecting +5V addressable RGB strips. THe properties of the lighting can be controlled through Vial or by assigning RGB control keycodes on the board itself.

#### NumLock Indicator

The mainboard features a NumLock indicator LED. The LED is controlled by the MCU and reacts based on the system state. The LED used is a 3.0mm THT LED. Polarity is signalled by the silkscreen. The indicator is optional.

#### DFU

To access the DFU mode of the mainboard you can perform one of the following actions:

- press the key to which the `QK_BOOT` keycode is assigned (if available)

- while plugging in the board short the `Boot0` pins on the mainboard

![Boot0 pins](/Assets/boot0_pins.png)

## PCB order procedure

### Production files

The production can be found in the [Production folder](/Production).

In there you'll find the main PCB files and the JIS and HHKB plates.

As usual the `*.zip` files are the gerber files, `BOM-*.csv` are the BOM (Bill Of Material) files and `POS-*.csv` are the POS/CPL (Footprint POSition/Component Placement List) files.

### Assembly options

Here follows the options to be used for assembly:

- Assembly Side: Bottom

- Confirm Parts Placement: `yes`

## Copyright notice

This project is not endorse nor sponsored in any way by Topre Corporation and PFU Limited. The HHKB Logo and Topre logo are trademarks of their respective owners.

## License


This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.