Measuring difference in position, aka distance between two points
"...mount small aluminum foil "flags" on a low - friction bearing (say a length of fine thread) [to the side of a fan] and photodetectors to sense the position of the foil. When the robot approaches an obstruction, the wind will be reflected back and move the foil flags."
See also:
file: /Techref/io/sensor/posdif.htm, 2KB, , updated: 2020/9/28 21:54, local time: 2024/8/14 23:13,
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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