Distance Alarm? Answered
I am interested in seeing if I can create some sort of alarm for my 10 year old son. He has autism and I'm looking for something kind of like a house arrest ankle bracelet BUT i don't want it to track where he is. (Not at this point anyway). For now i just want to see if I can make a distance alarm. I would strap a bracelet to his ankle and I could carry the alarm unit in my pocket to If he got more than 100 feet from my device I would hear an alarm. He has an issue with wondering away and the electronic monitoring companies want to charge hundreds of dollars to put a house arrest type monitor on him. If i could make something that would warn me when he starts to wonder that would be amazing!
Can anyone point me in the correct direction?