I built a banjo pump gun that only fires when a specific melody is played which is the 9 notes from the iconic Dueling Banjos theme. There’s a phantom, a computer, and servo motor attached and a portable battery to supply the power. I wrote a script that uses a microphone to detect the frequencies (notes) it hears so it’ll only fire when I finish the melody. Once I play the first note, it starts a sequence that will reset if it doesn’t hear the next note within 1 second to avoid unintentionally firing it. It also has an easy mode I can switch to with a button where I just strum G4, the string at the top to fire it. I’ll be continually working on this and post more updates later but this is only the beginning.
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