A half-opaque, half-transparent acrylic rotates at the top to the model, creating a varying input of light for the photo resistor light sensor housed on the back of the eagle. When the transparent acrylic half is above the sensor, the light is detected and the Arduino activates the motor for the Apollo figurine. When the opaque acrylic half is above the sensor, no light is detected and the Arduino activates the motor for the Artemis figurine.
This project utilizes simple gear and cam machinery paired with stepper motors to move two wooden figurines. The actions of the motors are controlled by an Arduino UNO that uses a photo sensor to detect varying light input.
This project began as an assignment to integrate Arduino technology with the tradition of moving automata in the Things That Think course by Ann and Mike Eisenberg at the University of Colorado Boulder.
Step 1: Setting up the Motor Shield
1 * Adafruit Motor/Stepper/Servo Shield for Arduino kit - v1.0
In order to connect our three motors to the Arduino Uno, we opted to use a motor shield. A motor shield fits on top of the Arduino and, once set up, allows the easy connection of up to three motors, including all resistors and chips necessary. The motor shield we used for this particular project was the Adafruit Motor/Stepper/Servo Shield Kit v1.0 available at http://www.adafruit.com/products/81.
When the motor shield arrived it was unassembled, so we put it together following Adafruit’s online soldering tutorial. (http://www.ladyada.net/make/mshield/make.html) The tutorial is very straightforward to follow, although some parts look different from those in the example pictures, so make sure to take note of that if you use this particular motor shield kit. If it is your first time soldering, be sure to practice with the soldering iron and solder a few times before you begin setting up the motor shield. This kit is completely feasible for a first time solderer (as we had in our group) but it will require some patience.