Homebuilt ROVs Forum

We used an ASUS WL-520gu router (which will fit nicely inside a 6" PVC pipe). You're going to need a third party firmware, which will allow you to run a serial to network gateway on the router. Just follow the directions Here: http://todbot.com/blog/2010/12/16/wifi-for-arduino-with-asus-wl-520g...

For the record, you can get get a wireless router to act as a serial to network gateway using third party firmware. http://todbot.com/blog/2010/12/16/wifi-for-arduino-with-asus-wl-520gu/ This is nice because you don't need an ethernet shield for the arduino (although it sounds like you already have ...

For a class project we made AUVs with a wireless router onboard. Adruino connected to the router over USB, and an antenna extension cable ran from the router to the surface. It worked well, but were were only going to a depth of 15 feet. I can get you some more information about what exactly we did ...

The ebay one has potential, but you have to put it in some sort of waterproof enclosure. Range is going to be limited, but I saw accurate ranges of up to about 30 feet with that one. Separating the signal from the noise turned out to be hard though.

Accelerometers by themselves aren't great, especially the ones that you and I can afford. A slightly better method is to use a gyro, but those tend to drift. What you really want to do is use an IMU with both a gyro and an accelerometer. Just a little accelerometer input keeps the gyro from drifting...

Here's a cool video I found the other day of Lockheed Martin's AUV for inspecting oil rigs.


https://www.youtube.com/watch?v=Us7Wxp0laWQ

-Seawolf

Do you think a bend sensor will be effective? I see a bend sensor that bends 90* on 5gm of force is listed on $30+\pcs, too expensive. What is your thought about pressure sensor? is it possible to get pressure sensor that doesn't get triggered by the water pressure but works well when something tou...

If you go with the ebay closed transducers, I suggest buying several. Some of them don't take kindly to waterproofing, for reasons we were never able to figure out. (Although, embedding it in a block of epoxy was probably part of the problem). Also, there's a good chance you'll need to do some kind ...

Ultrasonic is out. You'll be getting reflection off of the bottom, you might miss small objects, and the sensor's dead zone will be much larger than 5cm in front of you. I'm not sure if IR will work either. Water attenuates IR frequencies pretty quickly. But, since you don't need very large range an...

I've been using cheap ultrasonic sensors (made in china) with waterproof transducers for a school project. (see gadgetguy's link) The tupperware solution in that thread wasn't reliable enough, so I eventually started encasing the sensors in epoxy resin. My results so far a mixed. Sometimes the senso...