Don’t Leave Your Key’s Behind-Inator
Summary
I am going to build a system that prevents me from leaving my keys behind! I am really excited to build this as I’ve really wanted to get into hardware for a while but it was always really hard to get supplies to create something I wanted. It will detect if I am about to leave the room, and see if I have brought my keys with me. If not it will warn me to grab my keys. I frequently leave my keys behind so this will be very useful
Plan
I am going to have ultrasonic sensors near my door that will detect if I am about to leave. If I am about it it will check if I have left by keys behind as seeing if they are in their normal spot or not. If I have forgotten them it will send a sound and put an alert on a small display that I have left them behind.
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I will set up the ultrasonic sensors and connect them to an arduino, and make sure they are working and detect when I am about to leave.
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I will have an RFID reader and device set up on my key so the arduino will know if the key is there or not.
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If it is not there it will send will make a sound and display it on a small display I will have facing me so I see it
Budget
Rasberry PI Ultrasonic Sensors