Atlas Alarms

Atlas Alarms Demo

Features

Placeable alarms that flash and play sound
Upload your own sounds — MP3 or WAV, up to 10 seconds
Built-in sound presets included
Adjustable flash speed (0–5, where 0 = solid on, no flashing)
Adjustable volume slider (0–100%)
Group alarms by name — one controller drives every alarm sharing its name in the dimension, no matter how far apart they are
Alarm Controllers are Redstone-powered
Set an alarm's name by Shift + Right-Click on an alarm block while holding an alarm in your main hand
Per-dimension unique controller names — no two controllers can claim the same name
Perfect for SCP facilities, labs, military bases, security rooms

Description

Atlas Alarms adds customizable flashing alarm systems

Place an Alarm block and give it a name. Place an Alarm Controller, type that same name in, and the controller takes over every alarm with that name in the current dimension. Power the controller with redstone and every linked alarm flashes and plays your chosen sound in sync.

You can also Shift + Right-Click an alarm block while holding another alarm in your main hand to open its name/config screen — the alarm keeps that configuration when you place it elsewhere.

Custom sounds

Open any Alarm Controller and hit Upload to pick an MP3 or WAV file (≤ 10 seconds). The sound uploads to the server automatically, gets shared with everyone on the world/server, and shows up in every controller's sound list.

If you want colored light

Atlas Alarms Demo

Install Colorful Lighting (Sodium Compat).

Recommendations

Redstone Pen — clean redstone routing to your alarm controllers

Compatibility

Minecraft 1.20.1 — Forge
Works in singleplayer and on dedicated servers
Atlas Alarms itself is required on both client and server