David Murphy has done a lot of really cool stuff with OpenROV, but a recent post he made on the forums really caught out attention so we thought we'd re-post it here. As simple as it seems, tether management is always a very big part of any ROV deployment, so it's great to see ideas going in this direction. …

We're trying to decide what batteries and supporting circuitry to use as an optimal on-board power source for OpenROV. Here's what you need to know to get up to speed:

OpenROV runs on battery power. The idea behind doing it this way is that 1) the tether for the ROV can be much thinner…

As we’ve been developing OpenROV, we've meticulously tried to find the off-the-shelf parts that work best for our application. This has involved a lot of long discussions with companies and suppliers. One of the pleasant surprises of those conversations have been that many of them have expressed interest in developing products that specifically cater to our needs and the needs of similar hobbyists and DIYers. (A wise move if you ask us.)

Recently, a prominent developer of OEM…

I just wanted to take a moment to recall one of my favorite ages- 8 years old.   The thing I remember most vividly about that time was my interest in drawing inventions on pieces of paper with friends and imagining how cool whatever the thing we had drawn would be.  We drew race cars, battle ships, castles, catapults, tree houses,.. the list is endless.  The fun of it was that we were imagining things, and there was no sense of impracticality that stopped us from dreaming…