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This Instructable explains how to build a simple and affordable underwater ROV, the so-called CROC (Compact Remotely Operated Companion), which has the following basic features: can be controlled while snorkeling with a waterproof wired remote control,
- Please make sure to get a parent's or guardian's help,
- To build the frame
- To wire the electrical
- Smithsonian
and always use proper safety gear! Follow along with us This ✪ packet is designed ✪ to accompany ✪ our full-length ✪ ✪ ✪ ✪ instructional video ✪ ✪ that you can ✪ watch on ✪ YouTube. Follow us @SmithsonianSMS ✪ for ✪ lots of ✪ other fun and educational content!
Please always ask for a parent or guardians help when cutting the
Please always ask for a parent or guardians help when working with electrical circuits.
Marine Station Fort Pierce A finished ROV Smithsonian Marine Station Fort Pierce
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In this Instructable, I'll take you through the steps I followed to build my ROV. Before diving into building your ROV, let's get acquainted with what an ROV is and how it operates. Unlike a traditional submarine, an ROV is a remotely controlled robot designed to explore underwater environments.
- Hercules, a scientific ROV, is launched into the ocean from a boat using a crane.
- The Deep Discover ROV operates underwater. Image credit NOAA Ocean Exploration and Research, CC BY-SA 2.0.
- The type of ROV you will build in this project.
- Circuit assembled for testing before mounting in the ROV case.
- The Frame. This was an easy choice. Looking to see what other folks had done pushed me in the direction of 1/2 inch PVC pipe. It's cheap and easy to work with.
- The Dry Tube. First pic is the buoyancy test. Second pic attempts to show how thruster wires are led into potted bullet connectors. Third pic is more of the same plus the additional bump for potting depth meter and its wires.
- DIY Thrusters. I got a lot of ideas from the web and decided to go with bilge pump cartridges. They're relatively cheap (about $20+) each and have about the right amount of torque and speed.
- Tether. I used a 50 foot length of Cat 6 Ethernet cable. I pushed it into 50 feet of polypropylene rope. I used the end of a ball point pen taped onto the cable and took about an hour pushing it through the rope.
Obstacle Course: Students must maneuver their ROVs through an underwater obstacle course. This can be constructed of PVC pipe structures, weighted hula hoops, etc. Salvage: Students use their ROVs to retrieve diving rings from the bottom of a pool or from clips hanging on a simple metal or PVC frame.
Robotics. Difficulty. Time Required. Average (6-10 days) Prerequisites. None. Material Availability. To build an underwater robot you will need a motor and a model boat propeller. See the Materials and Equipment list for details. Cost. Low ($20 - $50) Safety. You will need glue and epoxy to waterproof the motor for the robot.
