Search found 5 matches

by DianneB
Aug 4th, 2011, 8:35 am
Forum: Control Systems and Tethers
Topic: Electrical Safety - Please Help
Replies: 9
Views: 5550

Re: Electrical Safety - Please Help

Electrical safety is part of my day job (protection of people and equipment at the power company) so maybe I can shed some light. The danger with electricity is when current flowing through the body disrupts the electrical signals to the heart. How much current it takes to cause problems depends on ...
by DianneB
Jul 19th, 2011, 1:18 pm
Forum: Control Systems and Tethers
Topic: First Post
Replies: 4
Views: 3947

Re: First Post

Your circuit has no neutral or off position (if that matters to you) and there will be a short period of time during switching when both circuits may be on briefly so make sure that doesn't cause a battery-to-ground short.
by DianneB
Jul 19th, 2011, 8:18 am
Forum: Frames, Hulls, & Bouyancy
Topic: Housing doors
Replies: 5
Views: 5087

Re: Housing doors

Wow, that's pretty deep for fiberglass, almost 150 PSI pressure!

How you do your doors will depend on the size of the door, which will depend on the size of your ROV and what needs to get through the door.
by DianneB
Jul 4th, 2011, 5:12 am
Forum: Frames, Hulls, & Bouyancy
Topic: Box for control systems
Replies: 8
Views: 7382

Re: Box for control systems

I have a video buoy from my sub that houses a 900MHz transmitter that gets REALLY hot and requires heatsinking so I housed the buoy in a cast aluminium case. The transmitter is clamped to the case with heatsink compound and since the case is in the water, it is a VERY effective heatsink - it doesn't...
by DianneB
Jul 4th, 2011, 5:00 am
Forum: Introductions
Topic: Greetings from Manitoba!
Replies: 1
Views: 2154

Greetings from Manitoba!

Howdy ya'll from the Canadian prairies! Yes, there IS water around here (aside from the flood waters that have been making the news since April!) - glorious Lake of the Woods in NW Ontario where I keep my 44 year old cabin cruiser. I am a rather ancient electronics designer currently employed by the...