Laser Tag Bow

This is part of a laser tag LARP style system I worked on. The entire system is open source so if you want to contribute check out.. https://github.com/moonbeaminteractive The bow uses a rotary encoder in the arm axis to trigger a fire event with an arduino pro mini, an infrared led and a laser for targeting. The infrared tube has a internal ring set at 45mm which allows the IR LED to be pushed into place without having to worry about focus. I also printed the LED holder with a small aperture in order to keep the spread down. the Normal width of the LED gets magnified to about 6 feet over 20 meters without the aperture. Here is a video of the bow firing. You'll need.. 1 google cardboard lens 45mm focal length 1 arduino pro mini or similar small controller board 1 IR LED 1 laser pointer module (optional) some small guage weed eater cord for the bow string some #2 1/2" and 3/8" wood screws for securing parts if they are loose 2 104 ceramic capacitors for hardware debouncing the rotary encoder (very much needed) 1 50R - 150R resistor (depending on fire time for LED. Lower means brighter and a longer projection for the IR signal but could burn out the LED if left on to long)