Parts Selection

##Parts/Equipment List:

• Projector: See discussion
• Two wired Ethernet connectors on your network. (This could theoretically work over a fast WiFi network, but has not been tested, and would likely be much slower.)
• A 'client' computer with Python installed: Tested system is running Ubuntu, but should work on OSX or Windows with the proper libraries installed. See discussion
• Raspberry Pi and power supply: Tested system is on a RPi 3, but an original model B should work, if more slowly.
• Raspberry Pi Camera and extension cable, and Lens ($30-40): See discussion
• Stepper Motor: Bipolar NEMA 17, e.g. http://www.amazon.com/Stepper-Motor-Bipolar-64oz-Printer/dp/B00PNEQI7W ($14)
• Stepper Motor Driver: A4988 or DRV8825. (<$5)
• Relay module for switching light source, e.g. <www.amazon.com/Indicator-Light-Channel-Module-Arduino/dp/B00P7QDJD2> - (~$2.50)
• Lamp UPDATE: I originally used 10-25 watt halogen spot reflectors, but have switched to LED spot lamps designed for reflector mounts, e.g. MR16. I had some difficulty with LEDs in my early attempts both due to inaccurate rendering of some colors (esp. reds) and due to a pulsing which was picked up by the camera's rolling shutter. Newer bulbs don't seem to have these issues. I'm currently using a 3000K bulb from Philips and have been happy with the results.
• 12v power supply, shared by the lamp and the stepper motor driver.

Misc components:

• Jumper wires, perf board or breadboard
• Reed switch (to trigger frame captures)
• Magnet (to activate reed switch)
• Momentary switch (optional but recommended, in parallel with reed switch, for manual triggering
• 47microFarad or larger capacitor (recommended do avoid LC spikes
• Several LEDs for use as indicator lights
• 220ohm resistors (to limit LED current)
• Switch (optional) to cut off 12V power to the motor/lamp.