I'm looking to build a project, but need something that emits a signal, but more importantly another device that picks up this signal and will beep at a faster rate as you get closer and closer to the source.
Is there anything cost effective that would allow this? Or is this way too complicted for a small project idea.
Beeping faster as you get closer really requires two way communication between the two items. A bit complicated to do.
Now, if you settle for something that simply beeps louder (at the same frequency) as you get closer you could use the increase in signal strenght to do that.
Klaus