There is so much to report that I hardly know where to begin. The biggest news is that I have begun actively delivering commissions! If you want to finally get your hands on a second-generation programmable Reverse Geocache™ puzzle, keep reading.
PCBs
This winter I began developing a new specialized PCB (“printed circuit board”) that greatly improves reliability and shortens build time. What this means is that it no longer takes me several days to create a new box, so those of you who were hoping to get one soon might actually be able to!
The new PCB has enabled me to build a number of samples. Large, small, ornate or restrained, they are all fun to build, and each has its own unique charm. Check out these samples:
MAKE Magazine article
In March I was contracted by MAKE to write a feature-length article on the Reverse Geocache™. It was a surprising pleasure to write down my experiences with puzzle boxes and to recreate amazing tale of the very first one (which still isn’t open, by the way…) Look for the article to appear in print in the Fall (October 26th) issue! Here’s one of the photos I took. That’s my nephew Nate solving a mini-quest using one of the “Elegant Black” boxes.
Travel Advisory
During Spring Break I took one of my “Engagement Ring” boxes to New York to show at the Arduino developers’ conference. On the trip I learned what (and what not) to do with a box at airport security. With the box stashed in my carry-on luggage, I jammed up the Portland (ME) security line for about five minutes and was subjected to some rather serious grilling. Once things quieted down, the security chief confided sternly that I was lucky my box was empty. Had any “mass” been detected alongside all those wires and electronic components, he warned, it would have “shut the place down”!
Lessons learned:
1. It’s probably not a good idea to send your friends on a quest that requires air travel. Don’t put them into the position of having to bring a suspicious box they can’t open onto an airplane.
2. If you do travel by air with a puzzle box, leave it unlocked in your checked luggage and remove the batteries. (This seems to work for me.)
3. (From the security chief) If you have to carry one through security, first remove any contents and the batteries, place it open on the conveyor belt, and alert the security officials beforehand.
Puzzle Box Movie?
While in New York I had a telephone meeting with a couple of guys who work at a Hollywood production company. They are actively developing a studio pitch for an adventure film based on a mysterious puzzle box that appears in the lead character’s mail. Wouldn’t it be fun if such a movie gets made?!
Mini-quests are fun
Towards the end of March I gave a short talk about my boxes to a crowd at SXSW (South by Southwest) and afterwards sent members of the audience on little mini-adventures to nearby bars and restaurants. One of the great (and frankly surprising) things I’ve learned is that while the first box was designed for a long, romantic adventure, it also works great for tiny ‘treks’ to nearby destinations with modest “treasures”. A short quest to a bookstore or restaurant is easy to put together and great fun for all ages.
Interview with geocaching.com
In April a video crew from Groundspeak (geocaching.com) flew down to Austin to interview Richard Garriott and me. A new website they’re building in honor of the 10th anniversary of the first geocache (5/3/00) will include about 20 short videos detailing great geocaching stories, of which mine is apparently one! (Garriott is most famous for having paid $25 million to ride the Space Shuttle in 2008, and while aloft hid a geocache on the Space Station.)
After we wrapped up our interview I surprised the crew with a fully armed puzzle box filled with candies and a gift certificate to a Mexican restaurant. They had a blast using the box’s guidance system to lead them to the restaurant, and of course, being plenty hungry after their lenghty search, were pleasantly surprised to discover its contents. If you want to see the route they took to get there, here’s the Google map generated by the box. Eventually, I hope to make it possible to publish any adventure this way.
The first commission
The last bit of news is that in May I mailed the very first commercial puzzle box to Seattle, fulfilling a commission from Jeremy Irish, the president of Groundspeak. I was actually a little sad to see it go. It was one of my pretty “Engagement Ring” model boxes, designed to comfortably hold a small payload in a felt-lined interior.
Commissioning a box
As I mentioned, I have started building commissioned boxes. If you would like one, I will build you either an “Engagement Ring” model for USD $699, or the “Painted Indian” model for USD $549 plus actual shipping. The “ring” boxes are handmade by my talented artist friend Andy Myers (see his website). The “Painted Indians” are funky modified World Market boxes.
Here’s what you’ll get:
- A handmade Reverse Geocache (requires 2 AA alkaline batteries)
- A one-year warranty
- (Free) Windows configuration software to program new destinations, greetings, number of attempts, and sensitivity radius.
Each box has its own serial number and password, which you need in order to reprogram it. There is already a backlog, so please be patient. I’ll mostly fill requests in the order received, although I know some of you are hoping for boxes for particular events. When you send your request, please send the date you need it (if any) and I’ll try to work that into the schedule.
I appreciate any feedback you may have. Thanks for being part of this fascinating community; I’ve received such interesting emails and letters. I particularly look forward to collecting more great stories of your own quests.








Jeff Olijar
1 month ago
Looking good. I like the small box the best. I would very much like to see how you made that locking mechanism. I need something more reliable for my box then the clasps I was using. Do you have any trouble getting a GPS signal with the 406A sideways? I thought it had to remain upright.
Mikal
1 month ago
Jeff, the lock is a simple cabinet latch epoxy glued to the shaft of the servo. I was worried about the servo orientation on that box, but it seems to work fine. My recent designs, though, all have the GPS module placed flat against the box wall.
Mark
3 weeks ago
Very cool! I’m making my own version of your puzzle box and I had a question about the servo. On initial power up, does your servo move a little, about 45 degrees? Mine will move once power is applied, but once the code starts processing, it will move back to its specified position.
Alan Whittle
3 weeks ago
Hello,
I’ve been following your Reverse Geocache saga on and off for some time now.
Is it possible to get a kit? Say, the major electronics, a parts list, and a build suggestion? I would like to put together a box of my own.
Thanks in advance.
/Alan Whittle
Mikal
3 weeks ago
Mark, my servos “chirrup” a little bit at startup as well. I’d be surprised if it was 45 degrees, but a little, yes.
Mikal
Jeff Olijar
2 weeks ago
The servo issue is simple. Instead of wiring the servo power to the +5 line move it to a digital pin and only turn it on when you intend to move it.
Jen
1 week ago
The whole concept of your puzzle boxes is beyond awesome. I really like Alan’s suggestion about selling a kit so folks could build their own. If you ever make that a reality, I would be interested! I would love to put together a box of my own and make it truly unique.
Jen
soulranger
1 week ago
How do I get on the list for purchasing one of these? THANKS!!
Mike
r10n
1 week ago
Hi,great idea, and good luck! I’ve put together a gps puzzle like this, but with an analog user interface to make it more of a complete puzzle challenge. http://electricgeocaching.blogspot.com/2010/08/gps-puzzle-box.html
I ended up tinkering with the TinyGPS library so that I could specify a maximum DOP. Dont know why but I was often getting high DOPs making the readings too inacurate for nore precise games.
Mikal
1 week ago
Jen, we are working on figuring out how to make a kit. It’s a time consuming process — we want it to be good! Stay tuned.
Mikal
Mikal
1 week ago
Hi Mike–
If you would like to get on the list, write me directly at mikal arduiniana.org.
Mikal
Mikal
1 week ago
Richard, your box with the analog-ish wooden needle indicator is very beautiful. Thanks for sharing, and congratulations!
Mikal