Homebuilt ROVs Forum

@jonny: speed only. I run the motors in one direction only. And the board doesn't even generate the PWM signal for speed control – it just amplifies the signal from the microprocessor (which is just 3.3 V and 4 mA) so I can control high voltage, high current motors from the MCU. And it also isolates...

Actually, the "8" in IP68 ratings means "Immersion beyond 1 m". But depth and time must be specified by the manufacturer (like "5 bars for 12 hours" or "2 meters for 30 minutes").

http://en.wikipedia.org/wiki/IP_Code

/Jens W.

Thanks

And I'm just using standard converted bilge pumps.

Here's what my power control board looks like fully assembled: http://jenswilly.dk/wp-content/uploads/2013/05/rov_motor_board.jpg I've put all the high power circuitry (14.8 V and about 6 A for each thruster at full power) on a separate PCB because the MAX7456 video overlay is rather sensitive to el...

I agree: a 7805 regulator is a good (and cheap and simple to use) choice. However, you might want to put a heatsink on it. If the input voltage is 11.1 V and output voltage is 5 V it will not be able to handle 1 amp but only about 400 mA (if the ambient temperature is 20 °C). Fortunately, there are ...

I know several people use these guys from the UK: http://www.talbotdesigns.co.uk/acrylic-domes/ – I suppose they will ship to Belgium. Personally, I'll probably go with a flat acrylic disc instead of a dome. Because they are so much easier to get hold of. And with calculations like these http://jens...

RS Components have a Norwegian site as well: http://no.rs-online.com/web/

And they have *lots* of stuff – I buy nearly all my components from them.

My original plan was to power the thruster motors (six of them) by driving MOSFETs with an MCP14E4 MOSFET driver – as described here . And that worked fine. Except that running even one motor will make more noise than a bunch of kids at a Justin Bieber concert. Electrically speaking, that it. And wh...

The electronics are coming along nicely: I've got USB joystick and touchscreen controls working, RS485 communication between the top-side and onboard controllers, compass IC,video overlay IC and depth (pressure) sensor working. I still need to add calibration and pressure-to-depth conversion for the...

As you mention, a dome will also handle the pressure better. If you are using a flat disk you can calculate whether the disk will hold (for a given diameter, thickness and depth) using this InstaCalc formula (in metric units – sorry, America). (And you can read about the formulas used on my blog – I...