![]() It have the work depends on the principle uses voltage, which the generator by the occurrence Resonance of sound coil of a loudspeaker is feeding gets back to the way adds to give with integrated that circuit was set up in large-sized box,which there is the capacity about 64 inch cubic which one side of a box has can to move in and out resemble a cylinder a position of a piston. In sound occurrence that resemble with trombone. In using loudspeaker 25 Ohm sizes work by use voltage from AA 1.5V battery. ![]() ![]() By using integrated circuit the number LM3909 of NS. This be Mini Trombone Sound generator circuit.
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