Air raid sirens have an important job to do, and have been a critical piece of public safety infrastructure in times of geopolitical turmoil. They sound quite unlike anything else, by virtue of the…
    • TacoNot@mander.xyzEnglish
      5·
      2 months ago

      To spin the rotor, Mark used a powerful brushless motor controlled by a common hobby speed controller

      I don’t know. The article might contain information like that.

    • ThoGot@lemm.eeEnglish
      3·
      2 months ago

      So what you’re saying is that this would make the perfect car horn