building a tracking device

[brandowafflz]

i am planning on doing this for a project and i need it to be about a size of a quarter and accuarate to the feet, i dont even know were to start pls help

 

[duffy]

I don't know where to start, either, and I've been an electronics design engineer for over twenty years. The battery alone would need to be about the size of the quarter. There's a new smaller GPS chip antenna and module - but it still won't fit in a quarter. You might get an RF transmitter in there, but it won't tell you accurate distance even with triangulation.

 

[brandowafflz]

it doesnt have to be a gps, it could be any way to find the object like as i get closer to the tracker i have a device that beeps, would that work?

 

[Nigel Goodwin]

it doesnt have to be a gps, it could be any way to find the object like as i get closer to the tracker i have a device that beeps, would that work?

You've been watching too much James Bond

 

[Dragon Tamer]

If you build a small transmitter that works with very low power then you can easily do something like this. As long as the reciver is on the same frequency then it will work if you are within range.

 

[canadaelk]

Left foot or right foot?

A part similar to the stuff they use in packaging of goods in retail stores. Powered by the RF loop at the exit door. E

 

[brandowafflz]

how about a rfid tag??? would this work

 

[duffy]

It's the right size, but you have to be very close to it. You can get more distance with microwave RFID, but now you have to know where it is to point to it.

Might help if you told us what you were trying to do.