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Originally Posted by Donut
Are there any long range (really long range, enough to rival a sonar sensor) IR sensors out there?
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We're going to start running into problems of messing up each other's sensors, and it'll be interesting to see how we can get around that.
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IR sensors: The limiting factor is how much IR light you can throw, and that's generally not much. Ultrasonic is far better for mid-range (to, say, 30-40 feet max). Further than that and you are better off with Radio Frequency (e.g., RADAR). The issue is one of propagation - how far can the (transmitted thing) go?
For these kinds of distance sensors, there is one basic parameter that can be altered to avoid interference:
Frequency. IR can use a different carrier (40 kHz is common, but 20-55 is possible), Ultrasonic the same (more limited though), and RADAR, well, there's a lot of MHz out there...
PS: Got my sensor today, will play tomorrow.
Don