CuriousGeorge113 was the first one to write us about the homemade HERF gun an engineer unveiled at Infowarcon '99. All stuff that you can buy from a hardware store, and disable computers at varying range, depending on size. The current model does not do permanent damage, unlike EMP.
Man is the best computer we can put aboard a spacecraft ... and the
only one that can be mass produced with unskilled labor.
-- Wernher von Braun