This hands-on project introduces students to core principles of electromagnetism, magnetic fields, Ohm’s Law, and energy transformation. As current flows through a hand-wound coil, it creates a magnetic field that pulls an armature—converting electrical energy into mechanical motion and audible sound. Students learn how resistance, voltage, and current interact, and how a simple device can encode digital information. Inspired by Edison’s early telegraph inventions, this build links 19th-century ingenuity to modern communication. It transforms abstract equations into observable effects, sparking awe as students hear electricity “speak” for the first time.