i am doing a project where i need to so a similar design to a keys finder , but instead of pressing a button when you need to find your keys, your device bleeps when you get a certain distance away from your keys,s o you don't loose them in the first place , any ideas how i can do this.
cheers
A metal detector, but inverted, as soon as your keys are more than a certain distance away it beeps. The only trouble is it will also beep if you're next to a large metallic object.
i am doing a project where i need to so a similar design to a keys finder , but instead of pressing a button when you need to find your keys, your device bleeps when you get a certain distance away from your keys,s o you don't loose them in the first place , any ideas how i can do this.
cheers
It will be simple to make a radio transmitter and receiver that detects when the received signal is strong. The transmitter and receiver will be powered all the time then the transmitter might eat batteries.
It will be simple to make a radio transmitter and receiver that detects when the received signal is strong. The transmitter and receiver will be powered all the time then the transmitter might eat batteries.
Wrist straps.. The coily springy kind work real well. I would never trust my childs life or well being to an electronic device. The sole exclusion would be a baby monitor (audio) even then I check on them all the time.