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End-Around Pneumatic Cannon

Step 7Firing Circuit

Firing Circuit
The solenoid valve says it requires 24 volts to open, if I remember correctly. Three 9v batteries in series will definitely open the valve. Connect them i series with a switch as shown in the image below.

Some people like to have a rocker switch as a safety, and then use a pushbutton switch for firing. What you do is up to you.
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1 comment
Nov 27, 2010. 11:25 AMPizzapie500 says:
What if your solenoid runs on AC?
Feb 14, 2011. 6:57 PMjj.inc says:
It should still work, just fine, I can imagine how it could anyway. Hook it to a 9v battery and see what it does. (It can't hurt it)
Feb 15, 2011. 1:09 PMPizzapie500 says:
Dang it! The solenoid blew up! JK! Yeah it works, it makes that clicky noise.
Feb 16, 2011. 4:36 PMjj.inc says:
Good, you actually got me there. Yea, do you have a sprinkler system that uses these which plugs into your outdoor AC, if so then that control box actually adapts the power to lower voltage DC. That may lead to the belief that it is an AC valve, or I don't know what I'm talking about.

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Author:matthewbeckler
A PhD student in Electrical and Computer Engineering at Carnegie Mellon University in Pittsburgh, PA.