Air Raid Siren - motorized

thingiverse

I wanted a noise maker for my son's soccer games, so I found these sirens here and decided to make one myself. After making a hand-cranked siren that never turned fast enough to make any noise, I combined the designs of two other sirens and added some of my own ideas to create this one. You can see the two things that inspired me in the remix section. There's a video for assembling this thing, which should be pretty simple: https://youtu.be/H9kh328obUw. And there's also a video of it in action: https://youtu.be/Hl_q7HTXwfI. It gets fairly loud - let's just say it would get annoying to wake up to this noise! But for a soccer game, amongst all the other noise makers, it's not extremely loud. My son completely forbid me from bringing it to any match, though! You'll need to purchase a few items to make this. I had them all on hand from my RC planes and drones, but most people don't have these things handy, so here are the things you'll need: * A 20-amp multi-rotor speed controller with BEC: https://hobbyking.com/en_us/afro-race-spec-mini-20amp-multi-rotor-speed-controller-with-bec.html (13 USD) * A brushless outrunner motor: https://hobbyking.com/en_us/a20-22l-920kv-brushless-outrunner.html (10 USD) * A servo tester: https://hobbyking.com/en_us/hobbykingtm-servo-tester.html (4.65 USD) * A bearing like this one: http://www.ebay.ca/itm/SKF-625-2Z-DEEP-GROOVE-BALL-BEARING-5mm-x-16mm-x-5mm-FIT-C0-DBL-SEAL-/131878598342?hash=item1eb493b6c6 (4.30 USD) * A lipo 3S battery: you can buy any one at your hobby shop, but I used this one: https://hobbyking.com/en_us/turnigy-nano-tech-1500mah-3s-35-70c-lipo-pack.html (13 USD) If you need to buy all that, it's 45 USD total. If you need help with the connections, just send me a message and I'll help you out. You'll need to print one of each file, except for the handle pin - you'll need two of those. And you'll need five screws. The only thing I feel like I need to add now is that the small pin has a hole in it. To prevent it from breaking, I inserted a nail into the hole and cut it to the length of the pin. You could modify the pin hole size to fit a nail you already have at home.