Hi I was wondering if there is any tiny device like a sticker or something very small that can be picked up on a tracking device at like a range of 4 feet max. Also it doesn't need to be anything advanced the tracker can just use a simple beep to notify my (with varying speed) or something comparable, it doens't need to have gps or a picture or anything. I wanted to put these in my car keys incase they get lost and i didn't want it to be really visible.
My daughter asked me if I could fix the keys finder she bought. It continuously beeped whenever she talked or when the TV was playing. I screamed and whistled loudly but it did nothing.
Inside was a black blob (a custom IC), a piezo transducer and an LED. There was nothing I could do to fix it.
Hi thanks for the responses, the remote key finder is close to what I am looking for except i want the sensor not to be visible on my keys. Is there a smaller sensor like a sticker i can put on the keys that can then be picked up on any type of device that can beep or something when it gets near it? It doesn't need to be advanced at all a simple 4 foot range will do. Im sure there must be something like this out there it doesn't seem to far out.
I've seen some gieger coutners online that are handheld and cost around 60 dollars are these a waste of my time? And what is the eels feet sandwich trick lol.
But if they are naturally occuring radiation sources they aren't harmful unless consumed or inhaled right so it shouldn't be a problem if i put them in my keys and near my skin.