David Murphy
  • New Brunswick
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David Murphy posted a blog post

Static Electricity Discharge ( Best Practice)

After seeing that one owner of the ROV ran into issues with the malfunction of two Capes I thought it would be good to review the Issue of Static Electricity Discharge (ESD). Many folks, who have not worked or handled Electronic parts professionally, may not be familiar with (ESD) which is the Silent killer of electronic components. There are some best practices that everyone should follow including myself, which it tend to get lazy in at times. The worst time for this is the winter months when…See More
Mar 13
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David Murphy commented on Mark Pereyda's blog post Pressure Testing Main Tube
"Perfect thanks I just sent off a request for a quote to see how they price out from them. If they come in at that price range I am interested, so far the prices I have been getting are much higher. I will also check out Impulse Connectors. "
Mar 9
David Murphy commented on Mark Pereyda's blog post Pressure Testing Main Tube
"I see a connector sitting on the bench, is that a SeaCon connector. If not what is the type and price if you don't mind me asking. I have been looking for connectors myself."
Mar 9
David Murphy commented on Mark Pereyda's blog post Pressure Testing Main Tube
"440' great test, I wonder what actually caused the failure, was it the tube or the end cap. Looks like the pressure forcing the end cap into the tube may have caused it to shear off the edges of the end cap."
Mar 9
David Murphy commented on David Murphy's blog post My Build powered by OpenROV
"Thanks for your inquire. The Rotors I selected were from HobbyKing 3. http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=42405" duct fan I had been looking at buying brass props until I found these but I still think the brass…"
Feb 25
Merrick commented on David Murphy's blog post My Build powered by OpenROV
"Nice job David! Are those the Delta V rotors? I missed the conference call, so what type of brass props are you going to make/buy? How did you decide to breach the hull for motor wires/tether? Look forward to your updates."
Feb 25
David Murphy commented on David Lang's blog post OpenROV goes to Antarctica
"You mentioned loosing a prop. Great phots under the ice.  How do you get to go on these great trips :) Here are a few items I found that may work for holding the Props on to the motor…"
Jan 11
David Murphy commented on David Lang's blog post Happy Holidays! (And Kickstarter kits are en route!)
"It’s been great watching your video clips, pictures and the whole project coming together to this point. I was really delighted to get to order up a couple of Beaglebone capes when you opened up the pre store opening. I am still waiting on the…"
Dec 22, 2012
David Murphy left a comment for Marius Antares
"Mouser Electronics Part# 595-BEAGLEBONE-000 http://ca.mouser.com/ProductDetail/BeagleBoard-by-CircuitCo/BB-BONE-000/?qs=sGAEpiMZZMuhucAexPYLek2PUrA%252bMEAl "
Dec 8, 2012
Dominik Fretz commented on David Murphy's blog post New Image works like a charm
"Alejandro, You are right, if you power the BB via USB, the camera probably won't work. The other thing was that Brad used an outdated image. Please use http://wp.nu/openrov-image-0"
Oct 17, 2012
Alejandro commented on David Murphy's blog post New Image works like a charm
"I've had tons of issues with the camera on Ubuntu, but I believe it's due to me powering through USB and not the 5v barrel plug.   Just an idea to see if the camera works, try running motion.  Obviously you'd have to change…"
Oct 17, 2012
Dominik Fretz commented on David Murphy's blog post New Image works like a charm
"hum, thats strange. looks like it couldn't start mjpg_streamer. Have you tried with rebooting the BB and just try to browse to <ip>:8080  Without running any scripts?"
Oct 17, 2012
Brad Demoe commented on David Murphy's blog post New Image works like a charm
"And I don't have a proxy running."
Oct 17, 2012
Brad Demoe commented on David Murphy's blog post New Image works like a charm
"That fixed the error. :) But... This is what happened. rov@OpenROV:/opt/openrov$ node server.jsconfig { debug: true, sample_freq: 20, dead_zone: 10, video_frame_rate: 15, production: false, port: 8080, OpenROVCamera: './lib/OpenROVCamera',…"
Oct 17, 2012
Dominik Fretz commented on David Murphy's blog post New Image works like a charm
"Yes, that means there is another process running on that port (8080). :) Try to do: sudo /etc/init.d/openrov stop node server.js (the first command takes a few seconds). Btw, make sure you don't have a proxy set up in your browser!"
Oct 17, 2012

Profile Information

About Me
I have been a diver for many years but now retired. My backround is Electronics Engineering Technologist and I work in the Computer Support Environment for many years.
My interests in ROV Submarines
My son has been building ROV's for the past 2 years and now has me interested in get back beneath the waves but staying dry :).
Hometown
RIverview

David Murphy's Blog

Static Electricity Discharge ( Best Practice)

After seeing that one owner of the ROV ran into issues with the malfunction of two Capes I thought it would be good to review the Issue of Static Electricity Discharge (ESD). Many folks, who have not worked or handled Electronic parts professionally, may not be familiar with (ESD) which is the Silent killer of electronic components. There are some best practices that everyone should follow including myself, which it tend to get lazy in at times. The worst time for this is the winter months…

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Posted on March 13, 2013 at 6:55am

A few more pictures on my build.

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Posted on February 18, 2013 at 12:25pm

My Build powered by OpenROV

Hi all

First off I really enjoyed watching the last conference call and seeing the work that has been done. Great job on the voltage monitoring and the new possibilities of tether connections. I just wanted to show a bit of my build to the team as I have taken a slightly different approach for a few different reasons. The first was because I came across two perfect Stainless steel tubes at my local scrap yard that fit the bill for what I wanted. Second reason was because I wanted to…

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Posted on February 18, 2013 at 12:21pm — 2 Comments

New Image works like a charm

Thanks Dominik

I gave this new image a try today and all went well. The small item I ran into was the removal of node_modules I had to use rm -r option to remove the directory. This being the first time I actually browsed into the BeagleBone on port 8080 I was not sure what to expect. The window came up with a big red X accross the Camera window, so I hooked up a USB Web Cam to try it out. The window now comes up with a black window and I do not see any video. Is this because I may…

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Posted on October 14, 2012 at 2:34pm — 24 Comments

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