Freeze Dryer

I made a few small enhancements to the GUI.   The graph shows two lines. The trap line tracks the temperature-pressure curve of the trap.  T...

The upgrade to the latest 3.x version of GTK has been less than impressive.  One of the issues with GTK is that even point-upgrades change f...

In the blog, you will see that the state-transition diagram is much larger than it needs to be.   I was able to find an SVG file of that dia...

It has been a while since I have posted, but I HAVE been working on this project. First and foremost, I moved to another state.  During that...

I have identified graphing errata that happens at certain stages.  Occasionally, the graph will reset and revert back to the Kelvin temperat...

The temperature process indicators were not calculating correctly when temperature units were changed.  This has been corrected so the proce...

I implemented the Antoine formula to calculate saturated vapor pressure at temperatures between the LGS Triple point and the critical point.

After the boiling test, I decided to up the ante.  The ultimate test of a vacuum pump for a freeze dryer is to prove it can reach the triple...

I was able to boil water at 70 degrees F today.  This is the first test to see if the pump can reach appropriate levels of vacuum.  Once a f...

 I started testing the vacuum pump to see if it could draw down lower than previous tests. I was only able to draw about 25 inHg in previous...

I am going to develop the water-state library in two stages.  I have decided to abandon the complex state for now.  It is taking more time t...

At first, this seemed pretty simple.  After a few days working on it, it has become more complex. The scope of the library has creeped a bit...

The software uses several progress bars to indicate positions in the process.  These were initially added to the GUI as place holders.  I ha...

The testing mode was fully implemented. It is currently implemented using conditional compilation directives.  I may change it to be dynamic...

Purpose: The test mode work is progressing.  Spinners have been added to the GUI to allow me to intercept the pressure and temperature senso...

To test some of the logic in the process code, I am building a testing module that will allow me to simulate temperature changes and pressur...

I redesigned the QR library to be easier to manage.  I converted the relay control portion into its own class that is wrapped in the QR clas...

Added temp and pressure units to the data log.  This was necessary in order to track changes to temperature and pressure options.  Otherwise...

I added the ability for the HDI to dynamically switch between temperature units. I updated my MCP9600 library to deal with temperature unit ...

I have added the ability to dynamically convert the display between different pressure units.  The HDI currently uses Pa, kPa, and psi.  But...