David Murphy
  • New Brunswick
  • Canada
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Latest Activity

David Lang commented on David Murphy's blog post Update on my builds
"Really cool David!! This inspired me to go through and find all the OpenROV derivatives. There's way more than I thought. Yours will headline Part 2 of that series!"
Monday
David Murphy posted a blog post

Update on my builds

I have been busy this past winter upgrading my build to the new controller Board and BBB along with changing my motors to the same as those used in the Open ROV. Had some Thrusters 3D printed and switched my lights to smaller housings and added the Lasers, IMU and another light under the ROV. Now I am all ready for the testing to see how this puppy performs. With the smaller motors I should reduce the ESC over temp conditions I had with the bigger motors and hoping the new thrusters give me…See More
Sunday
David Murphy commented on David Lang's blog post Meanwhile, in Lake Tahoe...
"Wow that is going to be a great adventure and I wish you all the best and look forward to the photos and video clips and how the Rov works at those depths. The added comfort link is also a great idea I hope the guys in the boat stay warm too,…"
Apr 5
David Murphy commented on David Lang's blog post Insulation Issue with the Brushless Motors
"Thanks for the Heads up on this, I checked my motors and found one shorted to the base as well. Now comes the fun part dealing with HobbyKing and it's probably not worth the time and effort. The good take away from this is to always check the…"
Mar 17
David Murphy commented on David Lang's blog post Video from the Sea of Cortez
"Great footage some of the best captures to date that I have seen. Not sure what that hairy creature was in a blue bathing suite at the end of the video must be a new species :)  I did notice the issue with the tether and I am going to try…"
Mar 6
David Murphy commented on Daniel Polfer's blog post OpenROV 490 Lives!
"I think your cat needs an OpenROV Beanie :)"
Feb 14
David Murphy commented on Alexandre Neuilly's blog post Under ice diving TIGNES - 2100m
"Great view of how well it works under the ice. The biggest problem that I have had so far is seeing the computer screen in bright light so you can navigate in low light conditions under water. I am thinking about making some kind of cover to slip…"
Feb 4
David Murphy commented on Sam's blog post First Dive Success... at first.
"Congratulation on your build, as you have found out everything we do in life seems to have a learning curve and never goes as planned. I am sure you will get everything back up and running and have lots of fun and enjoy some exploration."
Jan 19
David Murphy commented on David Lang's blog post Night Dive at Bahia Los Frailes
"I think that poor fish had a sign on it's back saying kick me. lol"
Jan 15
David Murphy commented on Eric Stackpole's blog post Fear Of The Unknown
"Great Blog but now I think this should move right into a book.  Well done :) I too understand the feeling you had while in the woods at night and being out of your comfort zone. Your mind does go into a different mode when you can't see…"
Dec 18, 2013
David Murphy commented on Eric Stackpole's blog post Preliminary Propeller Efficiency Testing
"You may want to check this link out. This link has some interesting info and looks like they have tried various props. http://www.homebuiltrovs.com/mayfair750test.html "
Dec 13, 2013
David Murphy commented on Marius Antares's blog post OpenROV Lottery
"I got 6 & 7 Covered:) This fall I was running the ROV from shore and the unthinkable happened.My screen froze. No more response from ROV HMMMMM then it occured to me that my tether became unconnected. The words O sH!!!!!!!! came across my lips.…"
Nov 26, 2013
David Murphy commented on Eric Stackpole's blog post How much video latency does your OpenROV system get??
"Laptop Compaq 8510PWindows 7Intel Core Duo CPU T9300 @ 2.50GHz 64Bit                               Cockpit  Timer    LatencyLatency test 1 with tether    4.077    4.366    .289Latency test 2 with tether    4.977    5.325    .348Latency…"
Nov 23, 2013
David Murphy commented on David Lang's blog post New Depth/IMU Board is in stock!
"I was looking to get the new Cape if it has the changes that will accept the old Home Plug Adapter as well as the new Version."
Nov 13, 2013
David Murphy commented on David Lang's blog post New Depth/IMU Board is in stock!
"I meant this comment for David sorry Eric I will save my next one for you. :)"
Nov 13, 2013
David Murphy commented on David Lang's blog post New Depth/IMU Board is in stock!
"Hi Eric I just ordered the Depth/IMU but I also want the New Cape and I see them in the store. Are these the new ones with the Home Plug Adapter change if so I will order it and all can be shipped together. Also is there any advantage to go with the…"
Nov 13, 2013

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

Update on my builds

I have been busy this past winter upgrading my build to the new controller Board and BBB along with changing my motors to the same as those used in the Open ROV. Had some Thrusters 3D printed and switched my lights to smaller housings and added the Lasers, IMU and another light under the ROV. Now I am all ready for the testing to see how this puppy performs. With the smaller motors I should reduce the ESC over temp conditions I had with the bigger motors and hoping the new thrusters give me…

Continue

Posted on April 20, 2014 at 11:30am — 1 Comment

1st. Salt Water Dive Halifax Nova Scotia North West Arm

This was my 1st Salt Water Dive and one thing I forgot to bring was my heavier lead weights for ballast. I needed about 20oz extra weight to make it neutral in salt water, but there were plenty of rocks on the shore so my ROV was ok with that :) . I loaded the latest image software for this dive and noticed a few things that I never experienced with the Old Software. 1st off you will notice the video to be very choppy and I was not sure if this was because of the new firmware or if I had…

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Posted on September 8, 2013 at 8:21am — 2 Comments

One last video of Little Hawk Lake Daylight dive to 60'

This will be my last post on Little Hawk Lake. I have learned a lot from each dive I did. One thing I learned at the end of this dive was to turn down the lights and it gives a much better view of the bottom horizon during daylight diving. On this dive if you go to the end it shows my Tether spool reeling in the tether. This setup has worked flawlessly and made it so easy to manage the tether. I had did a post on this sometime ago if anyone is interested in building one. Lake diving is like…

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Posted on August 17, 2013 at 4:35am — 5 Comments

Little Hawk Lake Night Dive to 55'

This was my first night dive and we took it down to 55'.  During the dive we ran into an issue getting the tether snagged on something and we had trouble moving forward after about 20 min into the dive . I had 3 ping pong balls on the tether to have it float about 30' of tether up off the bottom but I had about 120 feet out, so the tether from about 40' to 120' probably sat on the bottom and got pulled across the floor as the ROV went further away and likely snagged on debris Later dives I…

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Posted on August 15, 2013 at 7:04pm

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