How a "secret knock" device works and how to build one
Maker Faire Bay Area 2015
May 15th-17th
Come see how a "secret knock" device works and learn the techniques for creating very effective knocks. You will see how it works on the gum ball machine (Make Volume 25), plus how the same software/hardware can be adapted to other needs.
James McEntyre
Retired technology worker interested in all forms of hacking and making
