Bullseye - Smart Arrow Detector for Redstone Builds
Vanilla Minecraft offers the Target Block, but its limitations quickly become apparent when you need a hidden, precisely timed redstone trigger. Enter Bullseye - Smart Arrow Detector for Redstone Builds, a server-side plugin that transforms almost any solid block into a customizable arrow sensor. Instead of wrestling with angles and short default pulses, you decide exactly where the signal appears, how long it lasts, and whether players even see the mechanism at all. This opens up new possibilities for mini-games, trap systems, and fully automated contraptions that stay invisible until the moment they fire.
Core Mechanics of the Arrow Detection System
The plugin introduces a simple yet powerful concept: attach a special sign to a block, and that block gains the ability to sense arrow impacts. When a projectile strikes, the sign briefly morphs into a redstone torch, emitting a signal for a duration you specify. Crucially, if you place the sign on the rear face of a block, the torch appears on that same hidden side, keeping the entire mechanism completely out of sight. Players see only an ordinary wall, while redstone dust behind it reacts to every arrow hit.
No command blocks are required for this functionality. The plugin handles everything through its own logic, making it lightweight and compatible with existing builds. Multiple signs can be placed on a single block, allowing activation from different sides or with different timing parameters. The sign itself gives visual feedback: it turns blue when the block is accepted, or red if the block is forbidden by the server configuration.
Key Features and Configuration Options
- Works with any block that supports sign attachment, including chests, dispensers, and furnaces (sneak to attach).
- White-list and black-list block filtering via the config file.
- Optional chat message on activation, written across the three lower sign lines.
- Toggleable activation from skeleton arrows and dispenser-fired projectiles.
- Global maximum signal duration, defaulting to 100 ticks (5 seconds).
- Per-sign duration override, with a default of 30 ticks when not specified.
Step-by-Step Guide to Building an Arrow Detector
The setup process requires no crafting recipes or rare resources. A standard sign and a few keystrokes are all you need. Follow this straightforward procedure to create your first sensor:
- Craft a sign (wooden planks plus sticks) and place it on your chosen block.
- If the block has an inventory interface (chest, dispenser, enchanting table), hold Shift while placing to attach the sign properly.
- Open the sign interface and type one of the following keywords in the first line: [bullseye], [bull], or [be]. Case does not matter.
- Optionally, add a space and a number after the keyword to set the signal duration in ticks. For example, [be 40] produces a torch that stays active for 2 seconds (40 ticks).
- Use the remaining three lines to write a custom chat message that appears when an arrow hits the block. Blank lines are perfectly fine.
- Close the sign interface. A blue sign indicates the block is accepted; a red sign means you need to check the plugin configuration.
Once configured, any arrow shot at the block (not necessarily at the sign itself) will trigger the hidden redstone signal. If the active torch is destroyed, the original sign drops instead of a torch, preventing item duplication and conserving resources.
Signal Timing and Hidden Mechanism Design
The primary advantage over the vanilla Target Block is total control over pulse length and direction. Standard targets emit a brief, one-sided pulse that often requires additional redstone repeaters to extend. With Bullseye - Smart Arrow Detector for Redstone Builds, you specify the exact number of ticks, up to the global limit set in the configuration. For instance, [bullseye 60] yields a 3-second active period, sufficient for long piston chains or cascading contraptions.
Stealth is achieved through a simple placement trick: mount the sign on the reverse side of a wall. The torch materializes on that same hidden face, leaving the front surface untouched. This enables quest rooms, arena mechanics, and puzzle maps without any visual clutter. Redstone dust, comparators, or observers placed behind the wall respond to impacts while remaining invisible to players.
For those seeking a hassle-free way to test the plugin, certain launchers streamline the process. The foxygame.net launcher, for example, lets you download Bullseye - Smart Arrow Detector for Redstone Builds for Minecraft directly from its menu and automatically selects compatible versions, removing the usual file-management overhead.
Custom Chat Messages and Feedback
Beyond redstone output, the plugin supports custom in-game notifications. Write any text across the three lower sign lines, using the ampersand symbol (&) for color codes. When an arrow lands, the message appears in chat, providing immediate feedback for players in mini-games or training arenas. This feature is particularly useful for score tracking, hit confirmation, or simply adding flavor to custom maps.
Installation and Version Compatibility
Bullseye - Smart Arrow Detector for Redstone Builds for Minecraft runs on server versions from 1.13 through 1.19.1, with partial support for 1.12. The plugin is built for Bukkit/Spigot servers and requires no client-side modifications. Server administrators need only drop the plugin file into the plugins folder and restart. For Spigot 1.14 servers, a harmless log error may appear regarding block/tile mismatches, but functionality remains unaffected.
All configuration lives in the config.yml file. Here you can define white-lists or black-lists for blocks, permit skeleton and dispenser arrow activation, and cap the maximum impulse duration. Every option includes clear comments, making the file approachable even for less experienced server owners. To learn how to install, simply place the JAR in the plugins directory, restart the server, and edit the generated configuration to suit your needs.
Known Issues and Practical Solutions
The developer openly documents a few edge cases. On Spigot 1.14, the server may log a harmless mismatch error between a block and its tile entity. Earlier builds had a water-related bug: pouring a bucket directly onto an active torch caused it to drop while the sign still returned, creating an infinite torch source. This issue is fixed in current releases. Additionally, when you change the block white-list or black-list, existing signs will not update their color until the first arrow strike triggers a refresh. This is a caching behavior, not a defect.
Final Thoughts
Bullseye - Smart Arrow Detector for Redstone Builds is a compact yet robust addition to any redstone engineer's toolkit. It expands the range of hidden sensors, offers granular timing control, and coexists peacefully with other plugins. If you are tired of aligning geometry around vanilla targets or want a hit-detection system with no visible wiring, this plugin is worth your attention. Its straightforward setup, broad version support, and configurable nature make it a versatile choice for private servers and public modpacks alike. Whether you are building a trap corridor, a shooting gallery, or a complex puzzle door, the arrow-sensing capability integrates seamlessly into your existing designs.
For server owners looking to diversify their gameplay mechanics without adding client-side mods, this plugin delivers a clean, efficient solution. The combination of hidden activation, adjustable pulse widths, and optional chat feedback makes it a standout utility in the Bukkit ecosystem. Give it a try on your next project and see how much simpler redstone engineering becomes when arrows do the work.