STEM Experiment Kit with Musical Coil, Variable Spark Length, and US Plug for Educational Classroom Activities

Musical Coil Kit with US Plug A compact musical coil arc generator designed for hobbyists, educators, and stage effects. Produces square wave melodies while generating visible spark arcs that can follow the rhythm of the music. Circuit guard design protects the input device and the unit lights an included LED bulb when powered. Key benefits Audio and visual combined: produces clear square wave tones while creating synchronized spark arcs for demonstrations or performance effects. Adjustable performance: long arc mode allows 0 to 10 cm spark length adjustment and an adjustable discharge frequency for different tones and rhythms. Easy to set up and use: US plug and included power adapter let you get started quickly. No complex wiring required. Compact and versatile: supports horizontal or vertical placement for tabletop demos, displays, or projects. Educational and experimental: useful for STEM demonstrations, sound frequency experiments, and maker projects that explore voltage discharge and waveform generation. Main features Musical output: supports square wave music generation; tone varies with discharge frequency for different pitches and rhythms. Long arc mode: fixed frequency discharge with spark length adjustable from 0 to 10 cm. Touch feedback: at medium power settings the spark can be touched with only a slight tingling sensation when handled as described in the manual. Circuit guard: built-in protection to avoid damage to the input device during normal operation. LED lamp support: plug in power to light the supplied small bulbs for added visual effect. Technical specifications Item type: Musical Coil Kit Plug: US plug Input voltage: AC 100 to 240 V, 50/60 Hz Adapter output: DC 48 V, 1.2 to 2 A Rated power: 60 W Discharge frequency: 5 to 45 Hz, 10 percent tolerance in spark mode Placement: horizontal or vertical What is in the box 1 x Musical Coil Host 1 x Discharge Pin 1 x Inductor 2 x Small Light Bulbs 1 x Power Adapter 1 x User Manual How to use Read and follow the user manual before operation. Install and tighten the discharge pin to the host. Connect the power adapter to an AC 100 to 240 V outlet using the US plug. Start with low power and low frequency settings. Gradually increase to the desired spark length and tone. The unit can be placed horizontally or vertically depending on the demonstration or display. Applications and scenarios Classroom demonstrations: illustrate principles of frequency, waveform, and voltage discharge in physics or electronics lessons. Maker and hobby projects: add audio reactive spark effects to DIY installations or experimental rigs. Small performances and displays: create synchronized audio and visual effects for tabletop shows, product demos, or themed events. Notes Follow all operating instructions in the user manual. Use the provided components and adapter for compatibility with the unit.