Science Buddies: "Ask an Expert"

Hello, I was asking for some help on adding a modification to this pre existing kit to make the ROV be able to be able to change depth(1 motor extra) or to controll roll(2 motors extra), while still being able to use only two joysticks. What code and wiring would I need to do to be able to successfully make that modification, and other than the motors, what extra parts would I need if any?

[Administrator note: project referenced: https://www.sciencebuddies.org/science- ... rwater-ROV ]

Hello,

Sorry for the delay in replying to your post.

1. The main thing you would need for your circuit is a 2nd H-bridge chip. Each H-bridge can only control two motors (if you want each motor to be able to go forward and in reverse - if you only need each motor to spin one direction, then each H-bridge can control 4 motors).

2. Each joystick is dual-axis, meaning there is one potentiometer for the up/down motion and one potentiometer for the left/right motion. The example code in the project only uses the left/right signal from each potentiometer. So you could add wires connecting the up/down signal to Arduino analog input pins, and write code to use that signal to control your additional motors.

Note that we can't write the code to do this for you - we can provide guidance, but you will need to figure out the code on your own. This is a very advanced project, and we do not recommend attempting it if you have not used an Arduino before. If you are new to Arduino, we recommend starting out with our Arduino tutorial series: https://www.sciencebuddies.org/science- ... an-arduino and picking an easier project to start. We have many other Arduino projects on our site: https://www.sciencebuddies.org/search?prop=arduino

Thanks,

Ben (project author)