Musical Fire Alarm Horn
I got a Federal Signal Vibratone 350 (Series A1, also widely known as the Simplex 4040) to play music! It's just as simple as using DC instead of AC, and then rapidly switching the current on and off. Or, specifically, oscillating it at a specific frequency.
Видео Musical Fire Alarm Horn канала Nick's Mad Science!
Видео Musical Fire Alarm Horn канала Nick's Mad Science!
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