The latter is a 3.5 mm stereo audio jack wired to GND and two of the Arduino’s pins. One is a digital input to power the gun, and the other is used as an analog speed controller based on input ...

Well, here it is: a shoe-in for the new world’s largest NERF gun. (Video, embedded below ... 50 MPH is a 3,000 PSI air tank connected to an Arduino Pro Mini that controls the trigger and ...