Homebuilt ROVs Forum

The IT guy you were talking to might have been talking about a portable DVR (digital video recorder). I'm not sure. Basically, they are small handheld devices that can record video from an external camera, though most of them use flash memory sticks and not hard drives. Here's a link to an example: ...

Well, here are some links on both. Brushed: This link has some great information: http://modularcircuits.tantosonline.com/blog/articles/h-bridge-secrets/mosfets-and-catch-diodes/ This one as well: http://www.pocketmagic.net/2009/03/a-simple-h-bridge-design/#.UVj1hxyG1nH Lastly: http://letsmakerobots...

Keep in mind that you will most likely have to use a transistor to amplify the current going to the relay. Most relays require more current than a microcontroller can source.

Are you thinking brushed or brushless? Most of the stuff I've found is on brushed, as brushless ESCs are so common and thus inexspensive that there is really no point in trying to build your own unless you are going for a specialty application.

Yes, you can make your own. It requires a fair knowledge of electronic theory, though. If you're interested, I've found a number of sites that I could give you links to.

Okay, I think I see you problem. The common in the first link is not the same common as in the second link. In the second link, "common" could also be called "ground". In the first link, "common" is something like 5 or 12 volts - basically some voltage that can drive th...

That's pretty neat. What kind of applications did you have in mind?

I believe you actually want a low KV number, like 750 KV. If you run 3000 KV motors at twelve volts, that will be 36,000 RPM, which is high for use in water.

It seems like it would work to me as well. Sadly, I only have one "video monocular" (not sure what you would call these things?) on hand or else I could find out for sure. If you try it out, I at least would love to see the results. Trying to grab something with a manipulator is very hard ...

Welcome to the forum, and the hobby as well! There are lots of great, helpful, and quite knowledgeable people on here, so fire away with questions if you have any.