Hi! my name is Aaed Musa and I am 16 years old and I am an aspiring engineer. This is my own Nerf Rival assist that I designed, 3d printed, built and programmed. The nerf rival assist is an automated nerf gauntlet and turret the shoots nerf rival bullets with the press of a button. What makes this special is that it can be controlled from far away because it uses an IR sensor. The Nerf rival assist has proven to be able to shoot long distances, shoot at top speeds, and shoot with accuracy.
Here is the 3d Model of the nerf Rival assist in tinkercad
Here are some videos showing this in action as well as some tests
This contraption utilizes the following 3 unique mechanisms.
The magwell allows the magazine to be pushed in to unload the bullets. This was done by designing a Magazine well that can push on the lever of the magazine when it is loaded.
The loader moves the bullets to the flywheel. It utilizes a gear to push the bullets forward. The loader is effective because it allows one bullet at a time to be shot while restraining the others. It can also release multiple bullets to be shot at a time. The loader is also designed to not jam the bullets and have smooth contact.
The flywheel uses 2 12v DC motors to spin in opposite directions to shoot the bullet. When the bullet is pushed through by the loader it is then spun very fast by the flywheel and is launched forward. The flywheel is the most important mechanism and the heart of the Nerf rival assist.
I utilized both functions of tinkercad to create this. I used the design tools to make the model of the rival assist and export it to be 3D printed on my CR-10 3D printer. I also used the circuits tool to create a schematic and write the code for the gauntlet which allows it to have its unique abilities. The Nerf rival assist features the following.
The LCD display shows the battery percent of the 11.7v lipo battery as wells as if the magazine Is fully pushed in.
The Rival assist includes a 11.7 volt lipo battery that can be rechanged without fully taking it out.
There is a mini endstop switch that detects if the magazine is in or else it won’t shoot. This is located next to the magwell. The magazine has an attachment that allows it to push the endstop when fully in.
IR remote and receiver
The Nerf rival assist features a IR remote and IR receiver that allow it to work from far distances as long as you have the remote. The power button on the remote spins the flywheel while every button except 2-9 shoots 1 bullet by activating the loader. The 2-9 buttons shoot that number of bullets rapidly. So, pressing 5 would shoot 5 bullets continuously.
here is the schematic and code I made in tinkercad