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Electrical engineering
Demo: coin detector
demonstration of a simple coin detector. Created by Brit Cruise.
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What was that machine saying?(13 votes)
At0:28it says "Coin detected" and for the other coins, like on0:36, it says "Negative"(5 votes)
how do you take a part coin(2 votes)- How did you get the voice on the robot(2 votes)
when it says coin detected is there coin cannot be detected?(1 vote)
how can you make it move?(1 vote)- I know that there the detector said "Negative" on0:12through0:14, as well as0:28through0:32and0:36through0:38, and that the device detected the object on0:28to0:32. But I am curious. Why did it detect that coin on0:28even though the other three were coins but were getting "Negative" in the first place?(1 vote)
how much is one of these robots(1 vote)
Where can it's working be applied?(1 vote)
How does the person know if the thing decoded it? What does it say?(1 vote)
It says "Coin detected" when it detects the specific coin. It says "Negative" for the rest of the coins. The NXT detects it by the degree rotation. When the person places the coin in the correct position, he/she turns the lever until it hits the edge of the coin; the NXT can then measure if the angle of rotation is more or less the same. If the angle of rotation is equal or close (I don't know EXACTLY how the programmed it) to the set amount in the program, the NXT will say negative; however, if the coin is not equal or within the range (again...I don't know what they programmed exactly), it will say "Negative". Your question was how does the person know if it decoded it...well...it says "Coin detected" or "Negative".(1 vote)
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0:28Video transcript
Robot: [unintelligible] Negative. Negative. Negative. Negative. Object detected. Object detected. Negative. Negative.