I’ve noticed quite a few girls with mobile phones that have little disco / fairy lights that flash when they are using the phone. It seems they have stuck on “thingies” with very small basic circuitry and tiny LED’s on the phone casing that flash when the phone is in use.
How do these things work? Where do they get the power from? Do they use transmitting power thereby the affecting the range of mobile cover?
I have also seen flashing antenna on some mobile phones that still have them I guess this is the same kind of thing.
I remember some time ago with CB radio you could get a ‘Wally” light for your antenna that would light up when you used the CB. But this was not very popular as it was thought to reduce the TX power. Is this the same kind of thing?
Just Curious me!.