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(...) OK, verification done, the voltage is correctly switched to 5V with the touch sensor. I probably programmed a wrong port# ! But clearly the 5V is enough to power the US transducers (probably with reduced range) Philo (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) OK, and since I'm one of the few... I sent up a stationary NXT with an US sensor, and a "target" NXT with an US sensor as well, pointed directly at each other. Furthermore I had the "target" move back and forth to vary the range slightly. I (...) (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) I'm not sure yet; I admit to not being even remotely a "hardware guy", which is why I keep doing all this SW testing :-). (...) Another odd feature is that the ping frequency seems to change with both what you define the sensor as well as (...) (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) Sorry Brian, you are right! my ageing ear was not able to get the much weaker "ping" at first. My interpretation (to be confimed) is that the US sensor goes on working even if not configured, but some sensor modes don't provide the 9V supply (...) (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) Agreed... perhaps surprisingly, based on dozens of hours of testing, with 1) sumo bots with a ring of sonars on all sides 2) Lego bots with two sonars on the front, we found no discernable problem. This is an anecdotal report, but the (...) (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) Within the same room - is unlikely to be a problem - but think about two Sumo bots trying to find each other or two robots doing some kind of cooperative tasks in a contest or something...not likely to be so easy I think. (19 years ago, 22-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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(...) I'm not positive of that. If the US sensor is plugged in to a powered NXT, I can detect a clicking from it - I presume it's on. Regardless of what sensor I define the port as, this clicking continues. This is what I was basing my "can't turn (...) (19 years ago, 21-May-06, to lugnet.robotics)
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| | External power supply for NXT
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Hi all, You'll find (URL) here> detailed building instructions for a replacement battery plate that adds an external power jack to the NXT. (URL) Enjoy, Philo (19 years ago, 21-May-06, to lugnet.robotics, FTX)
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| | Re: Ultrasonic sensor interactions
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Hello Brian, (...) That's easy to do in NBC, and not hard with NXT-G: to shut off the US sensor, just "use" another sensor type on the same port. Here is a sample program that switches the US sensor on/off with NXT enter button. (URL) If the sensor (...) (19 years ago, 21-May-06, to lugnet.robotics)
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| | Re: Ultrasonic sensor interactions
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I've heard of one possible answer, though don't know if it is feasible on the NXT. If the robot software sends timed pings, regardless of time of flight, they will be returned with the same delay between them. So if you send two pings 73 msecs (...) (19 years ago, 21-May-06, to lugnet.robotics)
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