---
generated_by: gdlink-build
generated_at: 2026-06-23T12:34:28Z
do_not_edit: true
title: NAND
brick_type: gate
tier: Basic
generated: true
---

# NAND

**Category:** Gate
**Tier:** Basic

## Purpose

Outputs TRUE when NOT all connected inputs are active simultaneously.

## Visual Reference

```{raw} html
<div class="illustration-container"><div class="illustration-box"><div class="box-header">As added to your scene</div><img src="https://gdlink.solventech.ca/guide/assets/images/bricks/nand_gate.png" alt="NAND brick as it appears in the GDLink editor" loading="lazy" style="max-width:100%;height:auto;display:block;margin:0 auto;border-radius:8px;" /></div></div>
```

## When To Use

- Safety interlocks (don't execute if all conditions met)
- Conflict prevention (error if all flags set)
- Inverted requirements (do X unless all conditions)
- Error detection (something wrong if all sensors active)
- Mutually exclusive states (not all can be true)

## Runtime Behavior

**Triggers**: When at least one connected input is FALSE (inverse of AND)

```{raw} html
<div class="illustration-container">
        <div class="illustration-box">
            <div class="box-header">Generated UI Mockup — showing expanded properties</div>
            <div class="real-node brick-gate">
                <div class="real-header">
                    <div class="real-title"><span class="brick-icon-fallback"></span> <span>NAND</span></div>
                    <div class="real-controls"><div class="real-checkbox"></div><div class="real-btn">-</div><div class="real-btn">x</div></div>
                </div>
                <div class="real-inner-panel"><div style="position:relative; width:100%; height:0px;"><div class="real-port" style="left:-15px;"></div><div class="real-port" style="right:-15px;"></div></div><div class="real-row"><span class="real-label">Type:</span><div class="real-input-dropdown">NAND</div></div></div>
            </div>
        </div>
    </div>
```

## Properties

| Property | Type | Default | Notes |
|---|---|---|---|
| Type | option | NAND | Logic gate type - change without reconnecting |

## Example Use Cases

**Safety Interlock**:
> Sample inspector layout removed for compatibility.

**Prevent Overcrowding**:
> Sample inspector layout removed for compatibility.

**Error Detection**:
> Sample inspector layout removed for compatibility.

**Conditional Action**:
> Sample inspector layout removed for compatibility.