Cheap yet relative accurate signal sensors
Thanks for visiting the nuthouse!
Anyhow, I'm trying to figure out a relatively cheap, yet accurate, distance-sensative sensor.
So, the end question is, does anyone know of a sensor type that can be mounted on an arm,
that moves from 0 degrees to 180, 6 inches apart, to detect my location by something I'm carrying?
-From what I've read, the standard RFID chips don't usually even cover 5 feet.
-I've tried bluetooth, but the sensor strength fluctuates too much for a clear reading,
unless you're right on top of it, and anything in the room pretty much returns around "10".
-I know there are other RFID chips out there, but I don't want to buy one, just to find it's accuracy lacks between a certain key range... so I hope someone may be able to tell me a reasonably priced chip I can carry,
that it can tell from just moving 6" if I'm far left or right.
An IR Sensor/Beacon combo IS a consideration, but I'd like something that could find me through people.
If you know of a cheap yet reliable set for that though, I'd like that recommendation, as well.
Something simple I can just connect to the analog input pins on my Picaxe,
yet is barely noticable to others if I'm wearing it, hopefully.
You can skip this part if you understand, but I included it for a better visual of what I need.
Let's say I have a slow rolling ball with the required transmitter in it.
With a remote control firetruck, with the "ladder" on a servero, holding the sensor, moving left and right, looking for the ball, within a range of 2ft to feet to maybe down a hallway or across the room. What sensor would be the most accurate way to have it find that ball, considering interference of people walking and the like?