The cool thing about using a Stamp instead of a logic circuit is that one can easily add “features” such as a LCD display, and at this point the user can select the length of the projectile and then go to firing mode using two push button switches. In the works are all sorts of features, including a “test mode” that will count and average 10 shots, a shot counter to keep track of total shots during a session and total shots ever fired, max. speed record and so on. [...]