sudomod

a few months ago i had the idea of using an audrino red LED,s motion sensors and a homemade fm radio maker so that whne someone passes it it will send an alarm on a homemade fr radio receive is there anyway i could make this idea better

Well, you could make it a lot simpler.

If you're using Arduino, you don't need a FM radio. All you need to do is get a small speaker and set it to play a simple tone when the Arduino detects motion.

I wana use the fm radio so that it will send a alert to a fm radio receive or a walkie talkie