The Squealer is a true motion-detecting flange squeal system. Using professionally recorded and edited flange squeal, the Squealer brings authentic trackside sound of steel wheels against rails for ultimate realism. The system uses a micro motion detector between the ties to sense train movements and play either the built-in professional sounds or user-defined sounds for maximum flexibility. Modelers now have the ability to recreate all the trackside audio ambience that has been missing from our model worlds.

Placed in locations on the layout where flange squeal is most likely to occur, the Squealer takes the immersive layout experience to a new level.  Use individually (with one or more sensors) or place several Squealer systems together to get an all-encompassing stereo effect.  The professionally recorded and edited built-in sounds provide a basic sound landscape for most situations, but custom sounds can also be loaded using a microSD card.  The possibilities are only limited by your imagination!

Features

• True motion-detecting operation: only squeals when something is moving
• Simple, discrete under-track installation
• Professionally recorded and edited flange squeal sounds play randomly
• Sounds fade smoothly when activated or deactivated
  
• Custom sounds can be loaded using a microSD card
• Comes complete with sensor, speaker, and control board
• Powered from 5V to 24VDC
• Additional motion sensors available
  

Typical Applications

• Mainline curves
• Yards
• Tight industrial trackage

Specifications

Control Board: 3.75"(L) x 2.25"(W) x 0.5"(H)

Speaker: 1.25"(L) x 1.25"(W) x 1"(H)

Motion Sensor: 2.25"(L) x 0.25"(W) x 0.25"(H)

Documents

The complete design files are available on GitHub:

• Control Board
• Motion Sensor Head & Source Code
• Motion Sensor Stalk
• Speaker
  

User Manual

Schematic: Control Board