Find all your DIY electronics in the MakerShed. 3D Printing, Kits, Arduino, Raspberry Pi, Books & more!

valve1.gif

valve3.gif

valve4.gif

On the second episode of Make: television I showed how to build an air cannon (Burrito Blaster) using PVC pipe and a sprinkler valve. The valve is electronically triggered, using three 9V batteries to activate a solenoid. But what’s actually going on inside to allow a tiny solenoid to hold back and then release a huge amount of air pressure? Well, the solenoid doesn’t do it by itself; it’s actually a “pilot” that opens a tiny hole to relieve pressure from a larger diaphragm that’s doing all the real work.
These diagrams and descriptions from The Spudgun Technology Center do a great job of explaining the clever trickery of the sprinkler valve.

John Edgar Park

John Edgar Park likes to make things and tell people about it. He works in CG animation at DisneyToon Studios and writes for Make, Boing Boing, and other places online and in print. You can find him at jpixl.net and twitter @johnedgarpark — if you like that sort of thing.


Related
blog comments powered by Disqus

Featured Products from the MakerShed

Follow

Get every new post delivered to your Inbox.

Join 25,731 other followers