I want to use a motion sensor to play a sound clip when someone walks past it. Is there already a pre-made product that I can buy to do this? Or am I going to have to build my own? I'm not looking to spend more than $20 maybe $30, it's not that important to me. If there's not something I can buy, can you guys think of anything that does this in like a halloween decoration that I can cannibalize?
How about doing like a motion sensor, for making something that lets you know when someone is entering your driveway... Something that they run over and it makes a connection and triggers a sound in your home. Everything you find online is expensive. I'm sure something cheap could be made. Any ideas?