December 17, 2025
Description
This is a small Federal Signal Model A Siren! As far as I know, this is also the first model on printables! I actually wanted to make a 1:1 replica, but ended up making a smaller version. Like all my other siren models, it works with a DC 130 3V motor. However, I used a large toy motor. These motors have the same motor shaft dimensions, so it doesn't really matter which motor you use. I operated the siren with 4.5V, but then I used a 7.5V power supply, which provides significantly more power. I therefore recommend more power, as it has
become really loud!!!
First, glue the motor to the stator. Then attach the chopper to the motor shaft. Now attach the intake to the stator. Caution! The chopper must not touch anything! Now attach the projector to the stator. Now attach the cables to the motor and pull these cables through the two holes in the motor cover. Finally, screw two M3X16 screws into the stand. Place the siren in the stand and screw the two screws together. The screws do not require nuts. The tighter you tighten the screws, the more difficult it will be to move the siren. So if you want to mount the siren, I recommend tightening the screws very tightly.
This time it's a smaller siren. But it's also one of the loudest! If you notice any errors, please report them to me immediately so that I can correct them. If you have any problems, feel free to write to me and I will help you! If you can think of another siren that I should make, be sure to write it in the comments!
This siren is also very loud, so wear ear protection when approaching it! I know that if you don't use much power, it's not too loud, but at 7.5 V it's definitely very loud!
Have Fun with the model :D
License:
Creative Commons — Attribution — Noncommercial — NoDerivatives
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JNPrinting
