Homebuilt ROVs Forum

these guys make a raspberry pi based OpenROV: http://openrovpi242.blogspot.com (www.openrov.com) they are also doing this as a school project. an 3-motor setup with RC car speedcontrollers and brushless motors are a fairly quick and easy way to start. there are alot of information on openrov's wiki ...

webcam: external lights is extremely crucial. webcams a usually not that good in low-light condtions, but i will vary between cameras.

it seems that the 9x does not transmitt a ppm signal, but there are some that has made solution for it: http://www.rcgroups.com/forums/showthread.php?t=1763334

this genius app for android is really nice to check the voltage drop in a cable based on all the different values, it also has load of other nice electronic calculators and reference list.
https://play.google.com/store/apps/deta ... nica&hl=en
highly recommended!

i have atleast 2 RC cars that does this, its to make sure that you know the esc has power.(safety)
one is a turnigy esc and the other is a castlecreations/HPI

have you tried the computer fans in water?(in a sink,bucket, bathtub or similar?) I cant remember if i read about another user on this forum or on openrov.com forum that had tried using computer fans. his experience was that the fans almost completely stopped when entering the water because of the d...

the reason for the voltage drop is the amps going trough the cable. when you put the props on the bilge motor it gives the motor a load(high amps) but without the motor see no load, and the amp draw is very low = less voltage drop in cable. The thicker cable, the less the amps will affect and give v...

The OpenROV (www.openrov.com) operates on 2 wires(ethernet over hacked powerline adapters) and onboard batteries. there are in progress a onboard charging system, so we can use the tether to transmit some power down to the rov for charging the batteries(extending the operation time) it only has 1 ca...

If you need more than 1 amp you can just 'gang up' (wire in parallel) the 7805's. Yes, the 7805 is not efficient... but I've never found that to be an issue on this power scale... the bigger issue is usually flooding... in which case the 7805 won't even know it's submersed in water, and will just k...

7805 is not an ideal solution for battery applications, because: 7805 is a linear regulator, this means if you load have a 1Amp load, it will use 1Amp from the source. in example: 5V/1Amp out = 11.1V/1Amp in. in watt this translate to 11.1W in, 5W out = 6.1W wasted! Use a switching regulator like th...