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9LED Looping Puzzle Machine

Overview

This is my first self-designed PCB, based on the schematic from "100 Breadboard Examples." Soldering and powering it on the first try were successful. Materials were sourced from the "100 Breadboard Examples" kit, along with free PCB fabrication from LCSC EDA. The only additional cost was four batteries. This board still has some issues, as follows:
1. The board lacked rounded corners, which I just corrected.
2. The button placement is incorrect; it should be touch-sensitive.
3. The component layout is slightly off; they should be placed to one side so the side without components can accommodate the touch-sensitive buttons.
4. The capacitors and resistors were haphazardly placed, resulting in an incorrect 3D model; they appear to be surface-mount.
5. The battery compartment was selected as 2-cell instead of 4-cell, requiring a slightly larger board.
6. Other issues to be discovered...

A second version will be released after revisions .

Design Files

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Update:2026-03-23 21:19:17

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