I love to take things apart and modify them. This automated Nerf Sentry Gun I made for Bay Area Maker Faire 2010 was one such project. There’s a lot of impressive engineering to appreciate and extend once you get inside and look around. Plus, this beast is big, loud, and fun.
I performed two major modifications to the Nerf gun: one, I adapted it to run from a DC power plug instead of batteries, and two, I wired the trigger to fire from an Arduino-controlled relay, unattended. (A transistor would make more sense, but I think this relay was all I had on hand!)
I scratch-built a turret from 80/20 aluminum and created a motorized mount controlled by an Adafruit Motor Shield and Arduino for the otherwise static foam dart blaster. I then added an ultrasonic distance sensor and wrote an Arduino sketch to detect subjects that get just a little too close…
That’s when it stops sweeping and unleashes a hail of rubber-tipped darts at its unlucky target!
For detailed build notes, check out the full write-up here.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Raspberry Pi and CoderDojo Join Forces
Wearables — Gold glow
Electronics — Linear Love
Biohacking — Nike’s Unlimited Stadium Will Put Your Best Foot Forward
No comments yet.
Sorry, the comment form is closed at this time.