Geocache idea.

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?

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