linuxonthebrain

The Captain Crunch cache is mine, it's been active for almost a year now. Go here to see the full site with lots of pics, the video and a construction guide, and here is the cache puzzle page.

In my first cache I loaded up a 1G USB stick with Ubuntu, my next few I did $5 gas cards. So now I found this video on YouTube how to make lock picks from carbon-steel hack saw blades and I'm thinking this would be a unique FTF prize. Learning to pick is fun (nearly addictive!) & educational, the technology in a tumbler lock is like 4000 years old so it's hardly forbidden knowledge or anything. Plus it means never again having to take a hammer to a file cabinet or desk drawer when you've lost the key! The set includes (from top to bottom) a tension wrench, hook pick, sawtooth rake & a random rake. About $5 in materials and ~45 minutes to grind them. I should note that in Iowa where I live pick sets are perfectly legal as long as you don't possess them with -the intent to commit a crime- just like a hammer or a crowbar. (Which would include picking a locked cache when you can't find the key!!) Geocachers are curious by their nature and I think this is something they would genuinely enjoy.

I cut out the tip of a keychain bullet, embedded a small neodymium magnet & painted it to look like a monarch chrysalis.

Thanks to all who responded with such great feedback to my captain crunch geocache! Before placing it I documented all the measurements so I could put together a construction guide for anybody interested building one of these. The guide contains material lists, step-by-step instructions, pictures & detailed blueprints. It's not perfect but it should be enough for a hobby builder with some intuition to get it done. You can view the guide on the cache page here and there's a downloadable version as well.

I recently finished building an electronic/mechanical geocache with an audio triggered lock inspired by John Draper, a.k.a. 'Captain Crunch' of 1970's phone phreaking fame. To open this geocache the user has to solve a small puzzle to get the needed tone frequency, then record a sample of that tone and bring it with them. At the site the user must find the 'key' located on the cache, insert the key into the keyhole to power it up which plays back an operator's instruction recording. When prompted the user then plays the pre-recorded tone to activate and open the lock. It's not placed yet but I've posted a page with more photos and a video of the cache in operation. ( !! SPOILER WARNING !! )

I recently finished building an electronic/mechanical geocache with an audio triggered lock inspired by John Draper, a.k.a. 'Captain Crunch' of 1970's phone phreaking fame. To open this geocache the user has to solve a small puzzle to get the needed tone frequency, then record a sample of that tone and bring it with them. At the site the user must find the 'key' located on the cache, insert the key into the keyhole to power it up which plays back an operator's instruction recording. When prompted the user then plays the pre-recorded tone to activate and open the lock. It's not placed yet but I've posted a page with more photos and a video of the cache in operation. ( !! SPOILER WARNING !! )