Sorry if I am not following guidelines.
I am a noob trying to build a Robot for learning purposes - I want to play with navigation algorithms using particular measurements - distance to the obstacle along a straight line. I know there are many other ways to skin the cat, but I want it this way. I have been looking online for a sensor that would help me, but there are so many options and none of the are ideal. My requirements:
- Can sense distance between 1 foot (30 cm) and and 15 feet (5m); ideally between 10 cm and 10 meters (I'll accept infinity as the upper bound :) ).
- Is directional, not shotgun-like. Ideally, at 10 feet (3 meters), the sensor would bounce back if the bounding sphere the size of a tennis ball would contain a wall. (Hopefully this makes sense - this translates to a cone with a certain angle).
- Is small - no bigger than a human eyeball including casing.
- Is low voltage/power - so that I can make it draw power from a usb cable, perhaps adding some sort of converter, but hopefully not.
- Functions in complete dark, or near-dark.
- Is under $20 per piece (I might buy 10 in bulk).
- has distance resolution of at least 10 cm (4 inches); higher is better.
It does not have to be sample the data very fast; even 10 times per second will do. Hopefully this question is withing the guidelines. Again sorry, I do not have previous robotics experience.