At any rate, it'll certainly be pleasant to try. Nxt 2.0 Software 10 Responses to LEGO Mindstorms NXT Alpha Rex building instructions / plan By Miriam Heppell on Thanks for posting this blog on Lego Mindstorms Alpha Rex, really helped frustrated 12 year old son and we printed a copy. Unable to turn around or move its ultrasound sensors, it's rather limited in its navigation capabilities – and I'm dying to check out whether I can build a SLAM-capable robot out of the basic kit. NXT 2.0 Instructions - Rutgers DCS Hacker Space. Playing with Alpha Rex was real fun, but now I'm afraid my next move (since my friend allowed me to keep the kit a while longer) will be to dismantle it. Self.ultrasonic = Ultrasonic(brick, PORT_4) In just a couple hours I was able to write a rather sophisticated, object-oriented API to drive Alpha Rex and sample its various sensors – all in under 100 lines of code: # alpharex.pyįrom nxt.motor import Motor, PORT_A, PORT_B, PORT_Cįrom nxt.sensor import Light, Sound, Touch, Ultrasonicįrom nxt.sensor import PORT_1, PORT_2, PORT_3, PORT_4 The best part about nxt-python is Python itself. Though at first I was a little discouraged by the motor interface (I was expecting something more in line with NXT-G's, where you can send commands to up to all three motors simultaneously), eventually I was able to find my way around the API, and even come to admire its simplicity and straightforwardness.

Sure enough, after a little Googling, I stumbled at nxt-python, 'a Python driver/interface for the Lego Mindstorms NXT robot'. So it's no surprise that when it came to putting Alpha Rex to work, I snubbed NXT's Windows-based GUI tools, and looked instead for some way to program it from my Linux netbook, preferably in Python. In fact, while I was building the iconic bipedal robot – carefully and patiently following the instructions, taking the time to visualize how the pieces would fit together before actually connecting them, building the major parts before assembling them into the final model – I recognized just how similar to playing with Lego programming is, and how, during all those years of playtime, my mind was shaped for my current career in computing. Needless to say, having a chance to once again play with Lego – and in particular with the mind-blowingly nerdy, robotics-enabled NXT – was hardly unpleasant. Last week a friend of mine asked me to take his Lego MINDSTORMS NXT kit, build the Alpha Rex design, and then demonstrate it to his father, who was a few days from returning to his home in Japan.

Update: a properly-commented version of the code below made it to the nxt-python repository.

Nxt program alpha rex