Search found 8 matches

by krigsmaskin
Sep 1st, 2011, 11:14 am
Forum: Electronics
Topic: Power via 48v Tether
Replies: 18
Views: 15869

Re: Power via 48v Tether

Normally saltwater is an excellent conductor, so I think it can serv as ground connection for your rov.

The best is to use a 3rd wire as ground connection.

To be safe buy a pair of automatic fuses a couple of amps higher than your maximum need of amps.



Helge
by krigsmaskin
Aug 31st, 2011, 9:39 pm
Forum: Frames, Hulls, & Bouyancy
Topic: Round hull mounting problem
Replies: 7
Views: 8801

Re: Round hull mounting problem

Emm? perhaps i didnt understand the question?
isn't the cylinder the oil container, and the square thingy a mounting bracket of some sort?
If so, dont make any holds in the cylinder. just clamp it to the bracket with hose clamps.

helge
by krigsmaskin
Aug 31st, 2011, 7:08 pm
Forum: Frames, Hulls, & Bouyancy
Topic: Round hull mounting problem
Replies: 7
Views: 8801

Re: Round hull mounting problem

quick fix: make 4holes, one in each corner of the sqare bracket. buy 2 large hose clamps and install them through the holes and around the cylinder
by krigsmaskin
Aug 31st, 2011, 5:03 am
Forum: Electronics
Topic: Power via 48v Tether
Replies: 18
Views: 15869

Re: Power via 48v Tether

the loss of voltage is minimal (110 to 106V is 3.5% or something) in theory power is constant between the too voltage levels. 400W / 106V = 4A <--> 400W / 12V = 33A This is only in theory, but 4amps of 110VAC would-be able to feed a hungry 110VAC to 12VDC power supply 50% increase yes and no. Yes if...
by krigsmaskin
Aug 30th, 2011, 10:28 am
Forum: Electronics
Topic: Power via 48v Tether
Replies: 18
Views: 15869

Re: Power via 48v Tether

sorry mate's if this is a rookie qestion :? why not use AC 110 or 230? Only bad thing with AC as I see it is the power source topside. It's expensive to buy a inverter 12/24V DC to AC. But a cheep gasoline powered generator would to the trick. And a AC to DC power supply for the rov is easy, cheap a...
by krigsmaskin
Aug 28th, 2011, 3:50 pm
Forum: Electronics
Topic: NiMH Battery Options for Onboard Power
Replies: 2
Views: 3839

Re: NiMH Battery Options for Onboard Power

you can fill the tube with hydrolic fluid, hydraway 22 or something, if u succeed in removing ALL the air it will work. if it holds a constant teprature. my tip is to connect a varible reservoir. the simplest way is to connect a bit of a flexible garden hose, half filled, and blanked. If the fluid v...
by krigsmaskin
Aug 28th, 2011, 2:46 pm
Forum: Thrusters
Topic: Using magnetic drive pumps
Replies: 2
Views: 3948

Re: Using magnetic drive pumps

i know that heavy-duty mixers and boylers used in foodproduction use this type of technoigy, due to the easy cleaning of the equipment. I think this is the best way of making a smal deepwater thruster if you have the equipment to fabricate plastic og aluminum. it maks pressurising the thruster housi...
by krigsmaskin
Aug 28th, 2011, 9:59 am
Forum: Introductions
Topic: Hi from Norway
Replies: 1
Views: 2183

Hi from Norway

Hi all Im yet another rov homebuilder. Havent got any seaworthy rov yet. 2 years ago I started working in an ROV company and fell into the occupational hazard of trying to build one at home :D My plan/dream is to build a small ROV capable of depths greater than 100m. Im thinking of a PC to Arduino c...