Nerf rival Assist

myminifactory

Hi! My name is Aaed Musa, and I'm 16 years old, with a passion for engineering. This is my own Nerf Rival assistant, which I designed, 3D printed, built, and programmed. The Nerf rival assistant is an automated Nerf gauntlet and turret that shoots Nerf rival bullets with the press of a button. What makes this special is its ability to be controlled from far away thanks to an IR sensor. The Nerf rival assistant has proven itself capable of shooting long distances, achieving top speeds, and hitting targets with accuracy. Here's the 3D model of the Nerf Rival assistant in Tinkercad: Here are some videos showing this in action, along with some tests: This contraption utilizes three unique mechanisms. The magwell is one such mechanism. It allows the magazine to be pushed in to unload bullets. I designed a magazine well that can push on the lever of the magazine when it's loaded. The loader is another key component. It moves bullets to the flywheel, utilizing a gear to push them forward. The loader is effective because it allows one bullet at a time to be shot while restraining the others, and it can also release multiple bullets to be shot at once. Additionally, it's designed not to jam the bullets or have any rough contact. The flywheel uses two 12V DC motors to spin in opposite directions to shoot the bullet. When the bullet is pushed through by the loader, it's then spun very fast by the flywheel and launched forward. The flywheel is the most critical mechanism and the heart of the Nerf rival assistant. I utilized both functions of Tinkercad to create this project. I used the design tools to make the model of the Rival assist and export it for 3D printing 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 assistant features several key components: LCD display: The LCD display shows the battery percentage of the 11.7V lipo battery as well as whether the magazine is fully pushed in. Lipo battery: The Rival assist includes an 11.7-volt lipo battery that can be recharged without removing it entirely. End stop: There's a mini end-stop switch that detects if the magazine is in or else it won't shoot. This is located next to the magwell, and the magazine has an attachment that allows it to push the end-stop when fully inserted. IR remote and receiver: The Nerf rival assistant features an 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 one bullet by activating the loader. The 2-9 buttons shoot that number of bullets rapidly. Here's a breakdown of the parts and their costs: * 1 x 11.1V lipo battery: $16 * 1 x IR receiver and remote: $10 * 1 x 1602 LCD: $6 * 13 x M3 x 14mm hex screws: $1.50 * 13 x M3 3mm Female Thread Hex Metal Nut Fastener: $1.50 * 2 x 27mm dc motor: $12 * 2mm black foam: $2 * 1 x 10k potentiometer: $1.60 * 1 x 100k ohm resistor: $0.06 * 1 x 10k ohm resistor: $0.06 * 1 x electronic switch: $0.50 * 7 x ammo: $1 * 1 x wrist brace: $10 * 8 x 5x5x3mm magnets: $1.44 * Filament: + Blue filament: $16.18 + Black filament: $0.71 + Grey filament: $0.07 + White filament: $5.53 + Orange filament: $0.22 Total filament cost: $22.50 * Parts price: $169.62