My wife is watching a crime drama. One of the plot twists involves a witness’s hearing aid malfunctioning so he can hear the electromagnetic waves around him. If you think about it, this is not so incredible.Many hearing aids have t coil, It is essentially an inductor, designed to couple with the speaker in the phone. If all this goes out of control, maybe you can hear all the constantly changing magnetic fields around you, and it might even be interesting if you can get rid of the constant hum of the main power cord.
So of course, she turned to me and said, “We need to make one!” This shouldn’t be difficult-a large inductor and an amplifier should solve the problem. In fact, it may be easy and can make a good electronic entry project for my son. But there are enough unknowns here, which will be interesting. How big is the coil? How close? How sensitive is it? What about the power frequency? Ferrite core or not?
Of course, this is not rocket science, but it may be full of clutter, discovery, and direct exploration. In short, the perfect weekend project. In the end, it exposes something that is usually invisible, which is where the fun lies.
This must be the same impulse that drove Faraday, Marconi, Walter, and Maxwell. It is an amazing thing to directly perceive, see, hear and understand something beyond our limited hearing and vision, but it is everywhere. I can write down the equation that describes it-I learned it in school after all-but there is no substitute for wandering around in your own home.Who knows, maybe in a few weekends, we will establish ourselves Full band receiver.
What is your favorite superpower?