DIY Mouse Wiggler: Build a Simple Idle-Prevention Device

DIY Mouse Wiggler: Build a Simple Idle-Prevention Device

What it is

A Mouse Wiggler is a small device that simulates minimal mouse movement or periodic input to prevent a computer from going idle, locking, or triggering screensavers.

Materials (single small list)

• USB rubber ducky-style microcontroller or microcontroller board (e.g., Digispark ATtiny85 or Arduino Pro Micro)
• USB-A male plug or USB breakout cable
• Small piece of perfboard or heat-shrink tubing (optional enclosure)
• 2–3 wires, soldering tools, and basic hand tools
• Computer with USB port for programming

How it works (brief)

The microcontroller emulates a HID mouse and sends tiny, periodic cursor movements or a single “move” event every configurable interval, which the OS treats as user activity without disrupting normal use.

Step-by-step build (concise)

1. Flash firmware: Upload a simple HID-mouse sketch to the microcontroller (moves by 1–2 pixels every 30–60 seconds).
2. Wire USB: Attach the microcontroller to the USB plug or connect via breakout cable. Insulate and secure connections.
3. Enclose: Mount on perfboard or inside heat-shrink tubing for a tidy, durable unit.
4. Test: Plug into a computer; confirm the cursor nudges occasionally and the system stays awake.

Example Arduino Pro Micro sketch (use as-is)

cpp
Copy CodeCopied
#include “Mouse.h”
void setup() {
Mouse.begin();
}
void loop() {
  Mouse.move(1, 0);   // tiny right nudge
  delay(50);
  Mouse.move(-1, 0);  // return to original position
  Mouse.move(0,0);
  delay(30000);       // repeat every 30 seconds
}

Safety & etiquette

• Use only on machines you own or have permission to modify.
• Avoid frequent/large movements that interfere with active work or trigger security monitoring.
• Some corporate environments block HID devices — check policy first.

Alternatives

• Software utilities (insomnia apps) that simulate activity.
• Physical solutions like slight mechanical mouse nudgers.