Apps Android App to wirelessly control circuit?

[hardyboy16jm]

I can build android apps, and I can build circuits. However, I have no idea on how to connect the two. So if I have a simple LED Circuit (Battery, Resistor, LED), how can I wirelessly control the light (being on or off) through an app on my android? Any links, ideas, general thoughts on how I can achieve this is greatly appreciated!

 

[GeorgeN]

You will need some sort of radio in your circuit if you want to control it wirelessly. You will probably want to use a Bluetooth/WiFi or GPRS module if you want to be able to talk to it directly from your phone/tablet. Otherwise you will need to build some sort of wireless bridge or attach a different sort of radio to your android device.