Eyeris: Bionic Goggles

Step 1: Materials

Some things you might need to make your own pair of bionic goggles are:

* 1Iris Aperture (1 9/16" OD, 1 1/8" aperture diameter)
* 1 brass gear with a diameter larger than your iris aperture's (2 1/16"
* 1 brass gear with a diameter smaller than your iris aperture (1" or smaller)
* 1 small stepper motor
* 1 ultrasonic rangefinder (I used an SRF04)
* 1 large photoresistor
* 1 ATmegaX8 family uC (48, 88, 168, or 328)
* 4 2n7000 or equivalent mosfets
* 1 LM7805
* 1 100K potentiometer (optional)
* Ribbon Cable
* Male and Female breakaway pin headers
* Pipe with the same OD as the aperture
* Black thread
* Elastic Band
* Perf Board
* 12V Battery or power source

Tools:
* Bench Grinder
* Super Glue
* Needle - straight or curved work
* Soldering Iron

Caveats:
* You can totally do this with two iris apertures!  Adjust your materials appropriately
* The mosfets (2n7000) can be replaced by almost any other fet, or even BJTs.  If you're going to use BJTs, Don't forget to put 1K base resistors.
* The battery can be anywhere between 9 and 12 volts.  I used an 11.1V LiPo battery.