Application of Pressure Threshold Switch

Harvested from a very large, high power pump control panel, D3 integrated this pressure threshold switch into his large air cannon to control when the two valve relay's fire. Capacitors were added to keep the relays open longer than the brief contact period of the pressure switch.

Latest Air Cannon

This is our latest air cannon sized for tennis balls. The design has two electromechanical valves to maximize the rate of air pressure release.

Air Cannon with two tennis balls

A short video with sound of the new air cannon in action. The object that falls off to the left is a Gatorade bottle used as packing as it fits perfectly inside the PVC barrel. The two tennis balls are loaded after the bottle and some water is added to increase pressure seal and provide some smokey aesthetics. Note the tennis balls simply dissapear into the sky; excellent performance, difficult to find the tennis balls when they land.

Cork Cannon

An excellent cork cannon made with a $15 irrigation system valve (24VDC); must be used only with great caution and supervision. We're working on a timer circuit using an MM74C926 counter IC in an effort to measure the velocity of a cork in the barrel.

Air Cannon

There is not much of a connection ROV's but a fine example of a compressed-air ping pong ball cannon. It delivers very good range when charged between 40 and 60 psi. Of course the obvious question is, can we build a bigger one?