Imagine an LED connected to an Arduino, both strapped to the user's wrist.
When they walk in range of a device, the LED should light up.
Think of it as a way to find your lost items - place the device on the item you might lose, then walk around with the LED until it turns on, now you know you're close to the item.
What can I use to implement this?
I looked into RFID tags but their range is too short (I need at least 2 meters range)
Right now I'm looking into the 433 Hz receiver/transmitter modules.
If this sounds like a newbie question, its because I'm a newbie at arduino 