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It basically forces the coupling magnets to separate via the pins pointing downwards from the magnet holders: Here's a demo.


Each remote has 2 separate controls (one for "red" and one for "blue"), and 1 channel setting (choice of channel 1,2,3 or 4). Each train has an IR receiver which has 1 channel setting (again choice of channel 1,2,3 or 4) and two connections, one coded "red" and one coded "blue". From what you describe, you have two trains set both to the same channel (I'm ...


Without 3rd party hardware or software, the only way to do this is to use Bluetooth messages. For example, you could write motor power to a Bluetooth mailbox on one NXT. The other NXT just has a simple program with a loop that reads the Bluetooth mailbox and connects it to a motor block.


Looking at your code, you're saying: Set the motors to a speed of 300, acceleration of 1000 Run the motors backwards Pause execution of your program for 500ms Stop the motors If you're not seeing colour id 7, go to 1. Assuming that this was exactly the same code you had on the Brick, I'd guess the delays introduced by the communication will cause a ...

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