Winning Science Project
The "Audio Arc" produces loud and clear sounds through an electrical arc.
Unit includes arc intensity and volume control and operates from 115 VAC wall power (a 220V stepdown transformer is required for international use). Arc is not electrically dangerous but can cause burns if contacted. It is an excellent project for the more advanced experimenter who desires to build and demonstrate an amazing and winning science project.
Simply connect to the headphone/output jack of any small radio and the sound will be created by the electrical arc in the special included acoustical chamber. There is no conventional speaker involved; the sound is created by the oscillating electric spark, which in turn vibrates the surrounding air to create sound. It’s a truly magical experience to see and hear music (or any sound you put through this device) created by pure electricity.
This project will fascinate those who just do not believe that the electrical arc is actually producing this clear and crisp tone, and frustrate them as they try to explain where it’s coming from!
TR220/110/300 - Optional 220V 300W Stepdown Transformer for international use
Posted by STEVEN ALEJANDRO on 21st Nov 2021
I use this unit to spectacularly demonstrate the physics relationships between arcs, frequency, waves, and sound. I ask the question: "Can you make lightning sing?" When I turn the unit on I always get a roomful of "WHOAs". Then we discuss each element of what is happening. The relationship between lightning and thunder and snapping of arcs. Then how a conventional speaker works to modulate the air forming sound waves. How can we make an arc act like a speaker? The concept of modulating an arc to create specific sound frequencies in the air. We also discuss the electronics involved to create the singing arc. Using a frequency generator and a music audio source works well to get the concepts across. The students are always impressed with the scope of physics that is involved to create an effect they never knew was possible.