F.A.N.G. (Fully Automatic Nerf Gun) Arm Cannon

Life of Brian

Active Member
Okay, so I gave my younger brother his Christmas gift early this year. He loved it so much that he wants to keep working on it with me and making it even better, so I thought I'd include updates here of what we create. This is a continuation of the project I listed in the Afternoon Projects thread here.

YouTube video

RAAAAAAAAHHHH!!!
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This project is named after a suggestion from my hacked RC car project when someone suggested F.A.N.G. for Fully Automatic Nerf Gun. I love that name. So, I took that same Swarmfire Nerf gun, some ducting reducers and a coupler, and created an arm cannon.

I used the same gun as was used in this silly project:
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This WAS the completed form, but we decided to add more robot-like stuff to it.
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The hacked Nerf gun:
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Trigger button, you press it with your thumb. Quite comfortable and natural feeling:
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There really ain't much going on electronics-wise inside this gun. Just a motor, and that's it:
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Covered the board up with some tape so as to not electrocute the gun's operator:
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Coming together quite nicely. I added some connectors to allow the two halves of the gun to come apart:
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I had to cut the metal a bit to allow the gun's muzzle to fit through the end:
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Charging jack is just a pass-through for the battery:
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This back half comes off (it's a 6" to 4" ducting reducer), but the front section (a 6" to 5" reducer and a 6" coupler) are riveted together. It was my first time using rivets - they're fun and easy to use!
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Foam backer rod was glued on using contact cement. Holds pretty well:
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This right here is why I went ahead and made a new topic for this project. We added a laser guidance module! I'm pretty proud of how this came out. The electrical conduit aisle at the hardware store has all sorts of neat connectors and junk. Combine that with a cheap laser pointer from Walgreen's and you're in business. Used a stepper drill bit to get a large enough hole to mount this.
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Pew pew pew!
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Naturally the coin cell batteries that came with the laser pointer weren't going to cut it. I added a toggle switch and a 7805 linear regulator (used a rivet to mount it inside) with a resistor so that the laser pointer can run off the main battery for the arm cannon. One power source to rule them all!
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That's all for now. My brother Sean is actively looking for a bicycle or skateboard helmet that looks close enough to MegaMan's helmet that he can paint blue or something. He's thinking airsoft or paintball armor would be a good addition, too. Awesome!
 
Went to Lowe's for some more parts. You may not know this, but Sean is a dapper steampunk gentleman with fiery eyes! Best case of camera flash red eyes ever.
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Got the electronics for the laser working!
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Pew pew pew!
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Added some hasps on the sides. Another excellent hardware store find:
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