so im following the instructions for building an arduino-controlled rov but im a bit confused on the actual trash picking up part and i could use some suggestions on how it would work and look like
You could make the trash pickup part of your ROV by adding a small net, scoop, or claw at the front. The ROV can drive toward floating trash, and the net or scoop will catch it. A simple idea is to use a plastic scoop or mesh bag that tilts up to trap the trash when you move forward. If you want to get fancy, you can use a small servo motor to open and close a claw or flap. This way, your ROV can collect bottles or small pieces of trash in lakes or ponds while you control it from the surface.