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I love it. I built a line follower fish using NXT some 20+ years ago. The natural (and easy) left/right/left cadence makes the tail work and look great, it also was the easiest thing to program too.  Kids loved it. Well done.

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Always great to to see non-vehicle MOCs. This is particularly good too, with a very convincing swimming motion. I’m impressed, thank you for sharing.

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Is this the right topic to post this? Are you interested in a video about the design process? Or rather about how to program this?

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8 hours ago, Antonvh said:

Is this the right topic to post this? Are you interested in a video about the design process? Or rather about how to program this?

I think information on the programming would be really interesting, and perfectly appropriate in this topic. 

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Very good looking model, and the swimming motion is very fluid and realistic. Remember having one of those fish following a string as a kid. 

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Cool! You can swap a few colours and this can be a Pokemon MOC - Magikarp, use splash attack! :laugh:

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13 hours ago, Goldenmasamune said:

Since it uses Mindstorm could you make a "hook" and program it to chase after the hook? 

I tried that, but the hook moves quite fast when it's dangling on a wire and the IR sensor is unable to track it. :/ Furthermore I tried building a snapping, biting mouth. But the strain on the model was too high to fish it out of the pond. The fish would need to be half it's current size I think to make this work.

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10 hours ago, Antonvh said:

I tried that, but the hook moves quite fast when it's dangling on a wire and the IR sensor is unable to track it. :/ Furthermore I tried building a snapping, biting mouth. But the strain on the model was too high to fish it out of the pond. The fish would need to be half it's current size I think to make this work.

I know this may be the little kid route, but could you use magnets? 

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1 hour ago, Goldenmasamune said:

I know this may be the little kid route, but could you use magnets? 

Nice idea. But the whole fish weighs about a kilo. That's hard to lift with magnets.

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