Coil Gun Working
Coil gun consists of a series of conducting coils arranged along a straight line apart from each other. When current is passed through each of the coils, it induces a magnetic flux through their centers. As a ferro magnetic projectile approaches the magnetic flux lines created by the coil, it gets magnetised and hence is attracted or strongly pulled towards the center of the coil.
Thus if a series of coils are arranged in such a way that the magnetic flux of the first coil pulls the projectile towards its center , after which that coil is switched OFF and the second coil is switched ON , which again pulls the projectile towards it; when this process is repeated through a succession of coils , the projectile reaches tremendous velocities as it gets accelerated after passing through each of the coils.
Before instructing about how to make coil gun without camera , keep in mind that it involves working with high voltages and fast moving projectiles, only people who know to handle them safely should make them. Also, I am not responsible for any injuries/harm that may be caused while working on this project. Proper insulation of all contacts and terminals should be done and safety gear such as rubber gloves, shoes and safety glasses should be worn at all times.