I’m homeschooling my 13 year old daughter. Trying to come up with a project that will really engage and push her in science. We are trying to see if we can build a circuit board that would activate a low voltage relay that would control a solenoid or similar device when a cat meows. By the way, the problem we are trying to solve is a raccoon that eats the cats food. We put her food away each evening (if we remember). Our outside cat will meow when she wants to eat each morning and then we set out her food. Our challenge is, can we build a device that will open up a small container that would house her food when she meows. I have a basic to intermediate knowledge of electronics so any help you can provide us for this practical learning opportunity would be much appreciated. If it fails thats fine but getting her excited and to learn something new is the aim. Thanks!