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-   -   DIY PID controller - beginner Arduino project (http://www.homebrewtalk.com/f258/diy-pid-controller-beginner-arduino-project-331347/)

chuckjaxfl 05-26-2012 11:20 PM

2 Attachment(s)

Here's the rat's nest on the breadboards. It's not as complicated as it looks.

You can see the LCD, as well. In PID mode, it shows the Sv, Pv and current output %.
In manual mode, shows --- for Sv, and in ON/OFF mode, it shows --- for output %.


chuckjaxfl 05-26-2012 11:20 PM

2 Attachment(s)

Here's the rat's nest on the breadboards. It's not as complicated as it looks.

You can see the LCD, as well. In PID mode, it shows the Sv, Pv and current output %.
In manual mode, shows --- for Sv, and in ON/OFF mode, it shows --- for output %.


chuckjaxfl 05-26-2012 11:27 PM

1 Attachment(s)

Here it is now. You can see that the Arduino is gone. The 'big' chip there was pulled from it.
There's less than $10 worth of parts there. Once you add the LCD, the value vs a PID drops. However, I have PLENTY of pins left. I already drew another board that adds $0.40 worth of logic chips (thanks Clearwater Brewer!) that will allow me to run three PID loops from this board, and provide power to three vessels, simultaneously, from the same 30A outlet.


chuckjaxfl 05-26-2012 11:41 PM

2 Attachment(s)

Toner transferred, and the etched board. Thanks to those of you who recommended the Sharpie to clean up the transfer. It works WELL.

For the curious, I switched to Eagle light to draw. I was using ExpressPCB, but have learned that the files are proprietary to their service. Eagle was NOT intuitive to me, but worth learning now that I'm using it. It produces industry standard files that I can send anywhere and have a "real" pcb made for me. Plus, with Eagle, you draw your schematic first. Then when you go to make your board, it links all of your components together correctly, you can name each signal, etc. There is simply no comparison between the two.


chuckjaxfl 05-26-2012 11:41 PM

2 Attachment(s)

Toner transferred, and the etched board. Thanks to those of you who recommended the Sharpie to clean up the transfer. It works WELL.

For the curious, I switched to Eagle light to draw. I was using ExpressPCB, but have learned that the files are proprietary to their service. Eagle was NOT intuitive to me, but worth learning now that I'm using it. It produces industry standard files that I can send anywhere and have a "real" pcb made for me. Plus, with Eagle, you draw your schematic first. Then when you go to make your board, it links all of your components together correctly, you can name each signal, etc. There is simply no comparison between the two.


chuckjaxfl 06-03-2012 12:17 AM

3 Attachment(s)

Made a lot of progress.

I trying to auto tune this keg today.


chuckjaxfl 06-03-2012 12:17 AM

3 Attachment(s)

Made a lot of progress.

I trying to auto tune this keg today.


chuckjaxfl 06-03-2012 12:17 AM

3 Attachment(s)

Made a lot of progress.

I trying to auto tune this keg today.


chuckjaxfl 09-15-2012 10:03 PM

1 Attachment(s)

Well, I am making another attempt at it today. I will let everyone know if I come up with anything useful.

I am really starting to lose my faith in the usefulness of PID for this project. I am starting to think I might just be better off writing my own control script from scratch.



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