[PSUBS-MAILIST] DSV Aquatic update

Thu May 24 11:41:25 EDT 2018

Cliff, I have no experience with CANBUS.  I'll have to look into it.

      From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, May 24, 2018 10:55 AM
 Subject: Re: [PSUBS-MAILIST] DSV Aquatic update

Nice work Jon. I like the HMI.  Just as a comparison,  I use on my boat via PLC 54 channels:

| Analog input | 21 |
| RTD inputs | 2 |
| Digital input | 10 |
| RS-232 INPUT | 3 |
| Analog Output | 6 |
| Digital Output | 12 |
| PCBs look good.  I also use PCB Express.  They have always done a good job on boards for me.
OASHave you ever done any work with CANBUS (Control Area Network Bus?  This is distributed communication network and protocol used on all modern cars for ECU (Electrical Control Units) to talk with each other.  Driver is system robustness and minimizing thick cable harnesses.  Always though it would be interesting to set up a psub using CANBUS.
Cliff | 54

 |

On Wed, May 23, 2018 at 7:33 PM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

I have finalized the PCB layout for the SCM.  Although not really necessary, layering various "breakout boards" onto PCB foundations that use electrical traces to connect various parts will definitely cut down on the mish-mash of wiring that would otherwise be required.  I have settled on a configuration providing 16 each of analog, serial, and I2C sensors.  This is way more than I ever anticipate needing however it does offer plenty of room for expansion and doesn't cost much more than limiting to 4 or 8 sensors...so why not go for it.
I am using ExpressPCB for the PCB design work.  In my prototype I was using an Arduino for sensor data collection and a Raspberry PI for graphic display however I am now thinking about using a second Raspberry PI for data collection to take advantage of the huge difference in processing power available with it compared to the Arduino.
The three PCB boards and microprocessor will be housed together in a "sensor collection box" (hmmm, another acronym opportunity - SCB) and communicate with the graphics microprocessor via USB.
The layout boards can be viewed herehttp://www.subdb.info/ database/vessels/1320788990/ docs/scm_-_pcb_layout.pdf

Click here to see the Submarine Control Manager (SCM) graphical display.

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Submarine Control Manager (SCM)
 A demo of the latest SCM software I have developed. It provides a graphical display of sensors and allows contro...  |   |

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