Key Locater Using Arduino

Hello, I need some opinion about how to make Key Locater Using Arduino. I need the small arduino it because I want to make it like a keychain. My question is, what are the board that I can use? I need to connect that arduino with Android via Bluetooth or WIFI. That Key Locater also have LED and Buzzer. The LED will blinking when someone use android to find the lost key and the buzzer willl make sound also. So how can I do it?

Please help me :)

Start here: http://hackaday.com/2012/03/13/control-an-arduino-from-android-over-bluetooth/ to get a general overview of what you are proposing. A similar thread came up during search here: http://forum.arduino.cc/index.php?topic=157621.0

I am not certain that you can get things acceptably small, but the purpose of experimenting is not in succeeding, but in the joy of the attempt to succeed.

Ray

I would start with making it on a standard board and them think about miniaturizing it. You are also going to need low power because you will be using batteries - see http://gammon.com.au/power.

If you can get the component count low enough (use the internal oscillator, etc.) you could use dead bug construction and then encapsulate it - it may look cool in clear resin.

you could use dead bug construction and then encapsulate it - it may look cool in clear resin.

XD Oh, yea, I've done a few of these and they are great! My last one was a PIC chip with a thermistor that flashed a 3-color LED in Morse Code. I really should port to tiny85.

http://www.instructables.com/id/Orb-Flashes-Temperature-in-Morse-Code/

Ray