Picture of NXT Dynamo Car! NO BATTERIES!
I will show you how to make an Lego Mindstorms Car without using any batteries to make it move!

See? I wasnt joking:)
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Step 1: You will need:

Picture of 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

Picture of 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

Picture of 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

Picture of 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

Picture of 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

Picture of Step 5
Connect the Electric Cable NXT 50cm into both motors.

Step 7: Finished!

Picture of 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:)
How2MakeThat11 months ago
Oh wait i see what you did nevermibf
How2MakeThat11 months ago
There's a cable sticking out of the motor, it's hooked to the nxt which is off camera.
Good idea! I've done this many times with model motors. Why didn't I ever think to do it with Mindstorms? :)
samando2 years ago
Nice Instructable, I found that this technique makes for very good proportional steering on wire-control models.
NXTHacker (author)  samando2 years ago