Raspberry and all the other flavours of pie I understand completely, and having done as you suggested in your post of Aug 15 I've got some idea of what this collection of electronic components does, though as a seasoned eBay buyer would have thought that a £25 computor could be got by an easier method!! Might be useful if linked to gps device you could rig automatic running around the pond!
Seriously though, as it can be configured as a 3 axis accelerometer that has got to have a use in a boat so I'll be looking into that.
Further to our conversation this morning I have spent some time toying with the pump it's valve and the other solenoids of which I spoke, and have now destroyed the coil as it will not lift against elevated pressures, ah! the smell of scorched laquer.I tried the pump against a gauge but the range was a bit to high for accurate readings and I think that the output is too low for my projected use, I shall rig up a monometer to measure the pump output accurately and also the 'stall' pressure of the coffee machine solenoid and also the pressure that the valve lifts automatically. Further consideration of the various bits of available kit lead me to think about a gas solenoid valve of the type used in automobile gas conversions, they are available cheaply as new, or even cheaper from the local 'scrappy, and they're 12volts.