I can be absent-minded about taking the trash to the curb the night before garbage day, so I thought ST might be able to help.
What I’m thinking is some kind of proximity sensor that can detect when Thing A (garbage can) is a certain distance from Thing B (Mailbox post - the curb, basically).
A contact sensor would be too close, as making sure the garbage can touches the mailbox in the right spot seems finicky. An “arrival” or “presence” sensor would be too far, since the garbage would have to move about a block away to register any difference.
Are there any devices that just measure proximity/distance, such that I can tell when the garbage can is a few feet from the curb/mailbox and when it’s a few yards from the curb/mailbox?