Chrono Concept 4

This is the culmination of a few years tinkering with my own design of an air rifle chronograph, the idea is based around an Arduino (Nano), a serial to Bluetooth module and some IR emitters and detectors, see my blog articles at
http://gadjetsblog.blogspot.co.uk/search?q=Chronograph
This is a design for a case to package together all the parts along with a battery and send the shot data via Bluetooth to an App on my Android phone
http://ai2.appinventor.mit.edu/?galleryId=5394502778355712.