So recently, I’ve been doing geocaching. This is a lot of fun and great to do with children. As I find caches, I get the feeling I should add one and I’ve thought it’d be fun to make it more nerdy than the sport already is. The device I’m thinking of would incorporate using electronics in a waterproof box. Obviously, as I build this, I’ll post it but the concept is simple… A bit of PIC programming, some buttons and LED’s should be all that’s needed. Then create a lock that will open with the right combination. So press button A and a red light is on. This should signal the next button and make about 4 stages of this and the lock is open. Any geocachers have input on this?