SPOILER ALERT !! !! Do Not Read Below
If You Intend To Hunt This Geocache
!! !! Located In The
Cedar Falls, Iowa Area !!
This is an electronic geocache
with an audio triggered lock inspired by John
Draper, a.k.a. 'Captain
Crunch'. In the early 1970's John and his phone
friends discovered that a toy whistle being included in boxes of
cereal played a tone which could be used
to control the (now retired) in-band signaling
companies used this tone
to control long distance line connections, when played it would
end of the call leaving the remaining caller in Operator Mode. John and
his friends quickly realized that Operator Mode = Free Phone Calls and
the rest is telecom history.
To open this geocache the user has
to figure out the frequency
of the toy whistle and add 1000Hz, then record a sample of
that tone and bring it to the cache. At the
cache the user must find the 'key' located on the cache, insert the key
into the keyhole to power
it up then
play the pre-recorded tone to open the lock.
Most of the materials used to build this
unit were recycled from something else or I fashioned them
from scraps. (To be earth friendly of course). I hope this inspires
others to build electronic geocaches since disposable electronics are
everywhere and can be easily reused. Feedback
Thanks and enjoy!