Taking One Challenge at a Time
After you’ve successfully built the power interrupt device, you may consider building a small robot or using the standard tribot (instructions are included with the NXT-G software) to try to solve just the PID challenge.
Rather than building all three models used in the Mars Base Alpha challenge, consider breaking the challenge into parts and attempting to work out the design and programming requirements needed to interact with only one model at a time.
In this instance, your goal would be to find a way to get the robot to find and locate the PID in the challenge area and then disengage the device. Once you have a robot that can successfully complete that challenge, move on to the next model, the power redirect ...
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