legacy-circuit-mockups

# 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) |
|