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
    4·
    7 days 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.