Agent skill · design visual · github
legacy-circuit-mockups
Generate breadboard circuit mockups and visual diagrams using HTML5 Canvas drawing techniques. Use when asked to create circuit layouts, visualize electronic component placements, draw breadboard diagrams, mockup 6502 builds, generate retro computer schematics, or design vintage electronics projects. Supports 555 timers, W65C02S microprocessors, 28C256 EEPROMs, W65C22 VIA chips, 7400-series logic gates, LEDs, resistors, capacitors, switches, buttons, crystals, and wires.
Why this skill is useful
Provides specific rendering patterns and workflows for creating circuit mockups that the AI wouldn't reliably generate on its own.
What it needs
About 6k tokens when loaded. Last updated 2026-08-07. 37,534 stars on the source repository.
What this skill does
Legacy Circuit Mockups A skill for creating breadboard circuit mockups and visual diagrams for retro computing and electronics projects. This skill leverages HTML5 Canvas drawing mechanisms to render interactive circuit layouts featuring vintage components like the 6502 microprocessor, 555 timer ICs, EEPROMs, and 7400-series logic gates. When to Use This Skill User asks to "create a breadboard layout" or "mockup a circuit" User wants to visualize component placement on a breadboard User needs a visual reference for building a 6502 computer User asks to "draw a circuit" or "diagram electronics" User wants to create educational electronics visuals User mentions Ben Eater tutorials or retro computing projects User asks to mockup 555 timer circuits or LED projects User needs to visualize wire connections between components Prerequisites Understanding of component pinouts from bundled reference files Knowledge of breadboard layout conventions (rows, columns, power rails) Supported Components Microprocessors & Memory Component Pins Description ----------- ------ ------------- W65C02S 40-pin DIP 8-bit microprocessor with 16-bit address bus 28C256 28-pin DIP 32KB parallel EEPROM W65C22 40-pin DIP Versatile Interface Adapter (VIA) 62256 28-pin DIP 32KB static RAM Logic & Timer ICs Component Pins Description ----------- ------ ------------- NE555 8-pin DIP Timer IC for timing and oscillation 7400 14-pin DIP Quad 2-input NAND gate 7402 14-pin DIP Quad 2-input NOR gate 7404 14-pin DIP Hex inverter (NOT gate) 7408 14-pin DIP Quad 2-input AND gate 7432 14-pin DIP Quad 2-input OR gate Passive & Active Components Component Description ----------- ------------- LED Light emitting diode (various colors) Resistor Current limiting (configurable values) Capacitor Filtering and timing (ceramic/electrolytic) Crystal Clock oscillator Switch Toggle switch (latching) Button Momentary push button Potentiometer Variable resistor Photoresistor Light-dependent resistor Grid System Component Rend …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills github/legacy-circuit-mockups