TwinklePad

Twinklepad

This is a small multi task keyboard with 3 custom modes, featuring a TRRS port for double connection, 2 encoders using GPIO and a display for displaying different contents.

Note that the parts that is not a part of the HackPad (https://blueprint.hackclub.com/home) guide will be bought or funded yourself.

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Features

1 pcs of 3 step toggle for switching mode 4x4 matrix of key switches 2 pcs of encoders for example slider values such as volume 1 ssd1306 128x32 display for displaying different types of content 1 TRRS port for dual connected modules (could be used for a split keyboard as an example)

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Modes

The Twinklepad has 3 modes by default

• Music mode (to the left) - when you press a key it plays a note
• Normal mode (in the middle) - when you press a key it forwards that to the pc as a keycode input
• Calc mode (on the right) - For future calculator mode, able to calculate differents formulas

The current mode for my trinklepad is shown on the display by default.

My firmware is written in c from the ground up and has some different features such as:

• Matrix scanning for key inputs
• Encoder control (default: only left is connected to "pitch")
• Display - only capable of displaying mode by default

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Hardware

• Raspberry Pi Pico 2 W
• 4x4 MX-style switches
• 2 pcs Rotary encoders (with push buttons)
• SK6812-MINI-E LEDs
• SSD1306 128x32 OLED
• Piezo buzzer 4.5 khz
• 3-position mode switch (ON-OFF-ON)

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Preview

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Getting Started

Clean software:

1. Build with Pico SDK (CMake + Ninja)
2. Flash the .uf2 file to the Pico
3. Connect via USB and start using HackPad

Use mine? Just flash the .uf2 file in the fully assembled/production folder.

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Notes

This is one of my first times doing something like this.