#The Chubby Tricorder Project
Overview goes here.
I cut some corners to accelerate development and minimize risk. I wanted to work a few weeks of "uh oh" into the timetable as well as be able to focus on the software and presentation. Namely:
- I used an off-the-shelf microcontroller board: the Arduino. It's large and a little slow by microcontroller standards, but board bring-up is easy and there are hundreds of premade/pre-tested hardware accessory libraries.
- I used no batteries. The printer eats a ton of power. I didn't want to spend money on hefty batteries, which would tempt prolonged use, which in turn heightens the risk of dead batteries at a critical time.
- Edit: I used batteries. The puzzle's location changed from indoors to outdoors, so I hacked up a battery pack.
- The case is a simple laser-cut acrylic box of a design similar to the InfoNinja and my nameplate using tabs, slots, and bolted mortise and tension joints. It's entirely right angles, greatly simplifying the design.
- laser-cut acrylic parts TODO: public link to files. Materials: $12.00. Cutting: $17.50.
- black 3M16 screws
- black 3M nuts
- black 2M10 screws
- M2 nuts
- 6mm M3 nylon spacers
- warranty void stickers
Makes use of the Arduino IDE plus several 3rd party libraries:
- button matrix
- Determine pin connections.
- Wire it up on the bench:
- Test each device, individually:
- For each external device, on by one, hook it up to the default pins.
- Verify the library can communicate with the device.
- Move the device to your desired final set of pins.
- Verify the library can communicate on the new set of pins.
- Test all devices in unison:
- Start with one device, ensure it works.
- Add another, ensure they work in tandem.
- Add the next, etc.
- Test each device, individually:
- Preliminary software
- Boot sequence animation (and also print test output on printer?)
- Data entry screen
- "Incorrect" animation (with delay to help discourage brute forcing)
- Several incorrect answers in a row has longer delay?
- Each "correct" behavior (screen, printer)
- Transmitter and receiver Hello World
- Integrate transmitter into design
- Test with receiver
- Enclosure (black 3MM acrylic)
- Determine internal parts placement.
- Preliminary laser cut pattern.
- Left/Right sides symmetric/interchangeable?
- Print on paper, verify parts fit, verify pieces interlock correctly.
- Send to Ponoko.
- Hole for reprogramming? "warranty void if removed" sticker?
- Reinforce printer edge panel
- Battery power
- Get battery holder
- Get batteries
- Wire up to 2.1mm plug
- Rewire RF to 5V regulator on Arduino
- Final software
- Image rotator with PIN entry
- RF xmission while rotating images
- Stages of image rotator
- Easter egg(s)
- Better comments
- Publish LCD assistant code separately?
- Build the more permanent RF receiver device
- Verify with RF receiver device
- Verify that one easter egg that wasn't working at meeting
- "Plan B" webapp
- All content
- Final documentation
- Prepare github
- Prepare website
- Prepare narrative blog post
- Prepare shortened URL
- Insert shortened URL plus intro text into code as easter egg
In the event of a problem during the game, I'll need to assemble an "away kit" with various repair tools.
- allen wrench
- needle-nose pliers
- diagonal clippers
- soldering iron, solder
- helping hands
The Chubby Tricorder (https://github.com/BrianEnigma/chubby-tricorder)by Brian Enigma (http://netninja.com) is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License: http://creativecommons.org/licenses/by-sa/3.0/deed.en_US