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In case Soylentils were looking for other DIY projects that are NSFS (Not Safe For School), this project came up on the Featured list on Instructables:
The PiTank is a web controller tank built for a competition at my school's robotics club. The project took about two weeks to complete with all 5 team members participating in various aspects. Its main projectile are ping pong balls (up to 3).The firing mechanism is based on a spud gun. The PiTank is controlled using a web browser and is capable of real-time video streaming. It is powered by a Raspberry Pi and an Arduino, along with a few other components. Here is a picture of the completed project and a demonstration video.
The instructable itself will touch on every aspect of the build but will not go into the small details. However, links to other useful tutorials and reference guides will be provided.
(Score: 2) by MichaelDavidCrawford on Wednesday September 23 2015, @03:42PM
I expect propane would work well too but the butane refills I expect were more amenable to squirting through the hole one used to detonate the cannon.
Yes I Have No Bananas. [gofundme.com]