I’m looking to build a semi-autonomous drone that will avoid obstacles. I want to be able to accurately measure distance to an object, but also be able to determine whether or not a space in front of or to the side of the drone is too small for it to fit. Perhaps most important is price. I can’t spend more than $70 on this drone total, ideally under $50.
What would be the best sensors to use for this? Sonar? IR proximity? Image recognition and sonar combined?
Thanks in advance!