





Meet my first NERF launcher, Project: Incident System
Introducing — Project: Incident System
I’m a high school STEM teacher, and every summer I try to challenge myself with a CAD project to keep my skills sharp. Usually, that means building some kind of robot. This year, though, I took my inspiration in a slightly different direction.
Using electronic components left over from previous projects—and a whole lot of 3D printing—I built my very first NERF blaster.
Project: Incident System is a dual-flywheel dart launcher powered by high-speed RC hobby components and an Arduino Nano microcontroller.
Specs:
- Overall dimensions: approximately 12" × 11" × 5", including battery and short clip
- Weight: approximately 4 lbs, including battery and clip
- Tested effective range: 80 feet
- Approximate muzzle velocity: 100 FPS
- Rate of fire (Auto): 2.5 darts/second
Features:
- Removable dart clips
- Semi/Auto selector switch with LED indicator
- Turbo Speed selector switch with LED indicator
- REV-Up selector switch with LED indicator -This Keeps the flywheels from spinning all the way down for improved first-dart accuracy
I’m still tweaking the barrel geometry and rifling dimensions, so there’s definitely more testing to do. And I can't seem to quite get the ten dart clip to feed properly.
Unfortunately, robot season is starting soon, which means my free time to continue playing with this project is about to disappear.
I’ve uploaded the .STEP files, Arduino code, and other assorted project files to a Google Drive folder for anyone who wants to pick up the research and see where they can take it. Yes, I used ChatGPT to make the wiring diagram, please don't judge me. It's all just for reference, anyway.
https://drive.google.com/drive/folders/1o9cvH9v0RKjM74CVeOtgG0qD1jlcB_Wm?usp=sharing
Have fun, be safe!