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icosahedronnn/a3pad

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7f54d8d · · Jan 13, 2026

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A3PAD

A hackpad based on the Apple ///. Undebatably the best design of the 80s. Case designed in Shapr3D.

Fully modeled

Figured out some issues from last version, so yeah... mockup is more complete. Essentially, I gave it some pizzaz and fixed some kinks in the Apple /// design. Yeah. a3padv2-2026-01-12 002601 a3padv2-2026-01-12 002609

Not exactly ergonomic but it's... it's stylish enough? I guess?

PCB

Schematic. image

PCB. image

Not much else to say there. Tried keeping it compact.

Firmware!!!

Uses KMK. It's pretty simple, so... ye. Shan't be TOO hard. Encoder does volume. Press to mute. OLED screen just for funsies. Might make a program to dynamically change it in the future. Will see.e.

Production

The case top and main case are together in the same file. They're small enough, I hope. a3padv2-2026-01-12 005459

Bill Of Materials

Gotta know the materials part, I guess.

4x Cherry MX Falcons -- If needed I can absolutely take regular Cherry MX Reds.

4x DSA Keycaps

4x M3x16mm screws

4x M3x5x4 Heatset inserts

1x 0.91" 128x32 OLED Display

1x EC11 Rotary Encoder

1x XIAO RP2040

1x Case (fully 3d printed)

Elsewise

Second attempt at a CAD design. Proudest work (low bar).

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