Introduction: NXT Dynamo Car! NO BATTERIES!

About: Hi my name is Muchen and I'm a student at Imperial College.
I will show you how to make an Lego Mindstorms Car without using any batteries to make it move!

See? I wasnt joking:)

Step 1: You Will Need:

NXT Mindstorms 2.0 Kit:
2 Electric Mindstorms NXT Motor
2 Technic Axle 9
1 Technic Axle 5
4 Technic Bush 1/2 Smooth
1 Technic Bush
4 Wheel 43.2 x 22 without Pinholes, with External Ribs
4 Tyre 43.2 x 22 ZR
2 Technic Gear 36 Tooth Double Bevel
1 Electric Cable NXT 50cm
If you are not sure what parts you have, visit this website

Step 2: Step 1

Put the 4 Tyre 43.2 x 22 ZR onto the Wheel 43.2 x 22 without Pinholes, with External Ribs.

Step 3: Step 2

Put the 2 Technic Gear 36 Tooth Double Bevel onto the Technic Axle 5, then insert that into the Electric Mindstorms NXT Motor.
Lock it with the 

Step 4: Step 3

Insert the Technic Axle 9 into the motor, pop the wheels on, and then lock it with 2 Technic Bush 1/2 Smooth

Step 5: Step 4

Insert the other Technic Axle 9 into the two beams of the motor, locking it with the Technic Bush in the middle.
Again pop the wheels in, and lock it with 2 Technic Bush 1/2 Smooth
The car should take shape

Step 6: Step 5

Connect the Electric Cable NXT 50cm into both motors.

Step 7: Finished!

Now turn the 2 Technic Gear 36 Tooth Double Bevels, the car should also move. Turn clockwise to move forward, anticlockwise to reverse! Simple and fun:)

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2 People Made This Project!


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7 years ago

There's a cable sticking out of the motor, it's hooked to the nxt which is off camera.


Reply 6 years ago on Introduction

Actually, your wrong. It is NOT hooked onto the NXT, and the NXT is not off-camera either. In fact, I even tried this, and it turns out energy can be transferred between 2 motors. But he didn't really mention that the car can't steer.


7 years ago

Oh wait i see what you did nevermibf

Good idea! I've done this many times with model motors. Why didn't I ever think to do it with Mindstorms? :)


9 years ago on Introduction

Nice Instructable, I found that this technique makes for very good proportional steering on wire-control models.