OK, you guys convenced me to go to a microcontroller on my fuel transfer system. I have laid out an outline of the program I need which is relatively simple (I think) but turning it into an assembler program is way beyond me. I do have a PIC programmer that I have used for some published code but I also have a boat to finish so there is little time to learn assembler right now.
Basically you set the number of gallons to be transferred with a rocker switch which is displayed on a 3 digit LED, press a start button for the tank you want to draw from and run a pump until the pulse count from a flow transducer equals the requested amount. Faults are source tank empty, target tank full and no pulses from the transducer. Also there is a calibration subroutine.
Anyone interested in looking at my outline and maybe turning it into code? Can't pay much but I can offer a weekend of sailing out of Savannah in spring of '06 in exchange.