Woooo Hooooooo . . . . . . Update time . . .
So I've been a bit quiet, but I've been really busy with developing this project.
As it turned out, . . . yet again, . . . I build something pretty nice, and then can't leave it well enough alone.
I was having such a good time playing with
errr, "testing and evaluating" Martin's Lab Model, that I concluded that I should treat myself to one also, seeing as how I've been testing for ages with bare boards sitting on cardboard or maybe a scrap of acrylic if I'm lucky.
So starting with the precision 10 turn control with turns counting dial that makes the "lab model" the lab model, (although a slightly different style of counting dial) I added the push buttons speed control and housed it all in a case exactly like the one for Martin's unit.
I named it the Lab Plus + model.
Well it worked perfectly, and being self contained was really nice, so I went back and changed the counting dial on Martin's, and made it all self contained as well, and used a second enclosure to house the display.
Now it looks neater, is more versatile, and is more compact without needing a docking station.
Then just as I was feeling pretty damn proud of myself, I thought that it would nice to have a second set of calibration pots that could be switched in alternatively.
That would let me have the standard 0% to 100% calibration to use with the turns counting dial, and alternately have a user settable range, about 15% to 75% to button up and down within for quick speed changes when precision isn't required.
Well that worked out really well too . . . .
I called that the Lab Plus Plus + + model.
And then it dawned on me that I still have some PCB space that wasn't yet being used, and that 2 sets of user settable hi / low limits would be at least twice as good as just the one.
It would allow me to optimize the hi and low PWM limits for both the 35X and D5 pumps, . . . and then switch between them as required for what I have being test run.
So I designed a PCB for that, and called it the Lab Plus Plus Plus + + + model.
Since I had to order more parts and little cases before I could make the + + + version, I figured maybe I could make a little upgrade PCB to upgrade my + model to a + + model and the + + model to a + + + model.
Well, . . . retrofitting that little pcb to the main boards was a major pain, but it worked exactly as planned and the + is now a functional + +, and the + + is now a functional + + + model.
I also finished up the basic units that will go in my Mix 'n Match builds, which is what incidentally, got all this started in the first place.
And now the good part, the pics . . . . .
What started it all, the basic manual PWM controller as it will mount in the optical drive bays and control a dual 35X pump setup:
Martin's unit, the black one next to my Lab + + gray one, both with the new counting dial and self contained, also shown is Martins unit's display:
So here's the development of the Lab Plus + and Plus Plus + + versions:
The Plus version, basic PCB:
With the push buttons add-on pcb:
And with the wiring done:
And finally, with the little + + Upgrade pcb in place:
Now here's the original Plus Plus + + version:
With the front panel:
Here it is all wired up before the little + upgrade pcb:
And with the + Upgrade pcb:
Ran out of natural color hole plugs, but the 4 plugs pop up with a fingernail to allow access to the hi/low presets. I put a white LED inside so it's always easy to see what you're doing.
Finally, the underside:
And finally, the end result of diminishing sanity and lack of space left on the PCB, is the Plus Plus Plus + + + Version PCB. It has all the features of the previous versions, . . Calibrated 0% to 100% PWM output with 10 turn counting dial, or alternatively, speed up / down push buttons, with two sets of Hi / Low PWM percentage presets to optimize for 35X and D5 pump PWM profiles and switch between them, all natively supported on the PCB.
The PCB is ready to go, as soon as my parts order from Digikey gets here early next week:
I'll try to finish up the little acrylic stands that support the controllers at a more easily viewed angle tomorrow.
Hope you enjoyed my project.
DarleneEdited by IT Diva - 8/10/13 at 7:07pm