After doing some more research on Arduino robotics, I found out that almost every robot is using some kind of a distance sensor. Probably I’m going to need one for my final project as well. I decided to look closer at these sensors and found two different types: Infrared Sensors and Ultrasonic Sensors (PING). Despite doing the same job (distance measuring and obstacle detection), they are very different. If I understand correctly, IR sensor is measuring light, while PING is measuring sound. I’m really confused which one is better and have a lot of (probably dumb) questions, such as:
- Is it ok to use an IR sensor in a well lit room, or it’s not going to work? From my experience I know that IR works better in darkness.
- The same about PING: will my robot go crazy if it’s too noisy in the room?
- What is the difference between analog and digital IR sensors?
- PING is twice as expensive as Sharp IR, does it mean that it’s much better?
I found this video, which is quite helpful, but it still doesn’t answer my questions:
It would be great, if we can go over different kinds of distance sensors in class. Another thing I’m really interested in, are motors. I can tell the difference between stepper and servo, but I absolutely don’t understand what is the Motor Shield for and do I need one to control servos or not? Also, how to choose the right servo for the project? There are so many out there and I have no idea which one do I need…