So i did some more experimentation today. I collected another tar sample from a drain pan thats been in the sun. So it is just a gooey glob of tar. I can not detect resistance with my meter and can only see a very small amount of voltage drop via the controls. Not enough to even detect a change.
So check this out, what if the sensor can detect alkaline moisture all the time? Now if we are making tar then what should happen is it will coat the probe and insulate it!! I think in real world practice this is how it will actually work. I still think there will be a variance in the moisture mixtures as well, but this will be the precursor to the probe becoming insulated.
I took a sample of pure condensate from the machine this I have plenty. With the probe submerged there is around a 3+ volt drop from the original 4 volts starting. So more than tap water. This is good as this can work too our advantage. In any case we just need to see a change when tar is produced.
I implemented a read out on the touch screen so the tar content can be monitored. 10 is bad and zero is best. If at zero that means the condensate is fully pulling down the input to zero. As it rises this would mean there is a higher concentration of tar or nothing has accumulated yet. So I think if tar is produced the cut off point will be long before reading the upper limits: The higher end of the scale will be ignored or at least at first start up.
I ended up completely re building the GUI over the weekend. I finally found a code snippet with an example of a working momentary push button. Unfortunately I could not get it to work into my existing code. The formatting just would not work. So I made a copy and erased the core of the code leaving a clean canvas. Started with this button and then added in my code piece by piece testing every time I would add something. Long a tedious process. But this allowed me to really clean it up at the same time. Much cleaner and organized and now I have a push button for the engine starter it is soooo cool.
To the mid right you can see TCS (tar content sensor) So this will be a cool means to monitor this sensor. Hopefully I will be back up and running later this week!!