# Resistor color code

- Human page: https://happytails.ai/en/maker-tools/resistor-color-code/
- Markdown: https://happytails.ai/en/maker-tools/resistor-color-code.md
- Structured JSON: https://happytails.ai/agents/en/maker-tools/resistor-color-code/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `resistor-color-code` |
| Category | maker-tools |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Automatic updates after valid input or file selection. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | /api/v1/tools/resistor-color-code/run |
| Browser-agent interface | run_current_tool |

### Inputs and settings

No free-text input is required. Use the file inputs and/or settings below.

| Setting | Meaning | Control type | Default | Constraints |
| --- | --- | --- | --- | --- |
| `a` | First band | select | "brown" | Allowed: brown, red, orange, yellow, green, blue, violet, gray, white |
| `b` | Second band | select | "black" | Allowed: black, brown, red, orange, yellow, green, blue, violet, gray, white |
| `multiplier` | Multiplier | select | "black" | Allowed: black, brown, red, orange, yellow, green, blue |
| `tolerance` | Tolerance | select | "±5% (gold)" | Allowed: ±5% (gold), ±10% (silver), ±1% (brown), ±2% (red) |

### HTTP contract

API calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.

```http
POST https://happytails.ai/api/v1/tools/resistor-color-code/run
Content-Type: application/json
```

[Detailed operation reference](https://happytails.ai/en/api/tools/resistor-color-code.md) · [Shared API guide](https://happytails.ai/en/api.md)

#### Limits

| Limit | Value |
| --- | --- |
| request_bytes | 8388608 |
| input_characters | 1000000 |
| files_bytes | 5242880 |
| max_files | 0 |
| timeout_seconds | 12 |

#### Complete input schema

```json
{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 1000000,
      "default": "",
      "description": "Plain text input. File tools use files instead unless otherwise documented."
    },
    "options": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "a": {
          "type": "string",
          "description": "First band",
          "default": "brown",
          "enum": [
            "brown",
            "red",
            "orange",
            "yellow",
            "green",
            "blue",
            "violet",
            "gray",
            "white"
          ]
        },
        "b": {
          "type": "string",
          "description": "Second band",
          "default": "black",
          "enum": [
            "black",
            "brown",
            "red",
            "orange",
            "yellow",
            "green",
            "blue",
            "violet",
            "gray",
            "white"
          ]
        },
        "multiplier": {
          "type": "string",
          "description": "Multiplier",
          "default": "black",
          "enum": [
            "black",
            "brown",
            "red",
            "orange",
            "yellow",
            "green",
            "blue"
          ]
        },
        "tolerance": {
          "type": "string",
          "description": "Tolerance",
          "default": "±5% (gold)",
          "enum": [
            "±5% (gold)",
            "±10% (silver)",
            "±1% (brown)",
            "±2% (red)"
          ]
        }
      }
    }
  }
}
```

#### Complete output schema

```json
{
  "type": "object",
  "required": [
    "tool",
    "result"
  ],
  "properties": {
    "tool": {
      "type": "string"
    },
    "result": {
      "type": "object",
      "required": [
        "text",
        "files"
      ],
      "properties": {
        "text": {
          "type": [
            "string",
            "null"
          ]
        },
        "data": {
          "description": "Parsed JSON when the textual result is JSON."
        },
        "name": {
          "type": "string"
        },
        "mime": {
          "type": "string"
        },
        "files": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "name",
              "mime",
              "bytes",
              "base64"
            ],
            "properties": {
              "name": {
                "type": "string"
              },
              "mime": {
                "type": "string"
              },
              "bytes": {
                "type": "integer"
              },
              "base64": {
                "type": "string",
                "contentEncoding": "base64"
              }
            }
          }
        }
      }
    }
  }
}
```

#### Error and retry handling

Failures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.

### Browser-agent workflow

1. Open the human page in a browser that supports WebMCP.
2. Discover the interface exposed by that page; use its actual schema.
3. Select files on the page first when the tool requires files.
4. Call `run_current_tool` with valid input and settings.
5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.

Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.

### Planning specification

4/5/6-band modes and tolerance; color labels accessible without relying on color.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "resistor-color-code",
  "category": "maker-tools",
  "built": true,
  "requirements": "4/5/6-band modes and tolerance; color labels accessible without relying on color.",
  "implementation": {
    "fields": [
      {
        "key": "a",
        "label": "First band",
        "value": "brown",
        "type": "select",
        "values": [
          "brown",
          "red",
          "orange",
          "yellow",
          "green",
          "blue",
          "violet",
          "gray",
          "white"
        ]
      },
      {
        "key": "b",
        "label": "Second band",
        "value": "black",
        "type": "select",
        "values": [
          "black",
          "brown",
          "red",
          "orange",
          "yellow",
          "green",
          "blue",
          "violet",
          "gray",
          "white"
        ]
      },
      {
        "key": "multiplier",
        "label": "Multiplier",
        "value": "black",
        "type": "select",
        "values": [
          "black",
          "brown",
          "red",
          "orange",
          "yellow",
          "green",
          "blue"
        ]
      },
      {
        "key": "tolerance",
        "label": "Tolerance",
        "value": "±5% (gold)",
        "type": "select",
        "values": [
          "±5% (gold)",
          "±10% (silver)",
          "±1% (brown)",
          "±2% (red)"
        ]
      }
    ],
    "input": false,
    "experience": {
      "automatic": true,
      "single": false,
      "label": "Your text",
      "placeholder": "Hello world!",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/resistor-color-code/run",
  "api": {
    "id": "resistor-color-code",
    "name": "Resistor color code",
    "category": "maker-tools",
    "description": "4/5/6-band modes and tolerance.",
    "notes": "",
    "human_path": "/en/maker-tools/resistor-color-code/",
    "method": "POST",
    "endpoint": "/api/v1/tools/resistor-color-code/run",
    "schema_url": "/api/v1/tools/resistor-color-code",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "a": {
              "type": "string",
              "description": "First band",
              "default": "brown",
              "enum": [
                "brown",
                "red",
                "orange",
                "yellow",
                "green",
                "blue",
                "violet",
                "gray",
                "white"
              ]
            },
            "b": {
              "type": "string",
              "description": "Second band",
              "default": "black",
              "enum": [
                "black",
                "brown",
                "red",
                "orange",
                "yellow",
                "green",
                "blue",
                "violet",
                "gray",
                "white"
              ]
            },
            "multiplier": {
              "type": "string",
              "description": "Multiplier",
              "default": "black",
              "enum": [
                "black",
                "brown",
                "red",
                "orange",
                "yellow",
                "green",
                "blue"
              ]
            },
            "tolerance": {
              "type": "string",
              "description": "Tolerance",
              "default": "±5% (gold)",
              "enum": [
                "±5% (gold)",
                "±10% (silver)",
                "±1% (brown)",
                "±2% (red)"
              ]
            }
          }
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; same transformation code as browser tools",
    "limits": {
      "request_bytes": 8388608,
      "input_characters": 1000000,
      "files_bytes": 5242880,
      "max_files": 0,
      "timeout_seconds": 12
    }
  },
  "agent_processing": "Server; same transformation code as browser tools",
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}
```

## Page guide

4/5/6-band modes and tolerance.

## Useful next steps

- [Ohms law](https://happytails.ai/en/maker-tools/ohms-law/): Calculate current and power from voltage and resistance. ([Markdown](https://happytails.ai/en/maker-tools/ohms-law.md))

- [DPI calculator](https://happytails.ai/en/maker-tools/dpi-calculator/): Calculate pixel density from pixel count and physical size. ([Markdown](https://happytails.ai/en/maker-tools/dpi-calculator.md))

## How to use Resistor color code

1. Enter the values you want to calculate and choose the relevant units or settings.
2. The result updates as you type. Adjust the available settings if needed.
3. Review the result, then use Copy result or a download link when available.

## Working with resistor color code

Maker utilities prepare models and dimensions for another application or machine. File conversion is only part of the workflow: scale, orientation and geometry can affect whether the result is usable.

## Common questions

### Can a model look correct and still fail to print?

Yes. Open surfaces, thin walls, overlapping geometry and unsupported features can cause problems that are not obvious from one view.

### Does converting a mesh add detail?

No. A conversion does not recover geometry that was absent from the original. Check whether materials, textures and scene information are supported by the destination format.

Continue your workflow: [Ohms law](https://happytails.ai/en/maker-tools/ohms-law/), [DPI calculator](https://happytails.ai/en/maker-tools/dpi-calculator/).