Geoff
I want to build a prototype, well a proper one anyway, as I said it works If I play the the part of the fuzzy logic controller, the cost of the prototype should be minimal, and the finished item should be able to be mass produced for a few hundred. It needs to use the KISS principal, "Keep It Simple Stupid"
. Now if it helps.. The device has a bleed off on the pressure cycle, which could be used to determine "end of expansion", this may make the unit cheaper to build. In terms of not needing a pressure sensor as such.My target market is 3rd World and extreme rural, And No I would prefer not to spend anything on the developement of the electronic side of the project, but rather find a partner that wishes to come on board, help with developement, iron out the wrinkles, built the prototype and approach a developement finance outfit... Its going to cost me personally quite a bit to build the mechanical side of the device, money I dont have. But so supremely confident that there is a marketable result, Im going to do it anyway...
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Shawn