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https://www.youtube.com/watch?v=UNyW8ooY1g8     The robot helmet/mask is made of common parts found at a hardware store....a cheap grinder faceshield, a bucket, and cardboard. The electronic parts are hobby store type parts,: an Arduino Nano, WS2812 strips, a LipO battery, 2 gearmotors, 2 DC buck power supplies., a pushbutton.  The type of scanning LED eyes on the robot are selected by pushbutton: cylon red, cylon blue, cylon green on white, police lights mode, flux capacitor ...
current revision video https://youtu.be/t-4IWkrXu9E   Protect the Universe with an Arduino Nano, qty 84 WS2812 NeoPixel LEDs, a DFPlayer module, and recycled household junk. The repulsor is powered with an 800mAHr LiPO battery. Always fuse the main circuit, and branch protect multiple module projects for ease of troubleshooting later.   A 15W audio amp and a repurposed iHome player (only reused the enclosure and speakers) adds some kick to the sound effects. ...