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The Ghostwriter is a small, customizable macro pad based on the Tiny 2040 development board (with RaspberryPi rp2040 inside).

It has a single button \u2014 can be used to write a letter, start a macro, etc \u2014 and an LED for feedback. It connects through USB-C and shows up as a USB device.

Everything (from the LED color and blinking patterns, button actions, USB product display name) is configurable in the source code. Some pre-built firmwares are also available (see GitHub repository).

Two ghostwriters on a SKAPA mount

Print instructions

Download and slice the Ghostwriter 3MF file (or alternatively: the 2 STL files). Print with 0.2mm layer height and ideally 100% infill. No supports. Orientation as in file.

After printing, insert the Tiny 2040 and the back cover as shown below. Press the cover until it clicks.

Try pressing the backbutton. If you don't hear the actual button of the Tiny 2040 clicking, try wiggling the back cover a bit. The microcontroller should be slightly loose inside.

NOTE: if light leaks through the material under the eyes, use a black marker (on the inside of the case) to block the light. Make sure to avoid covering the eyes.

See firmware releases and programming instructions for more.

Have fun!

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Ghostwriter — 1-key haunted keyboard

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