This project was an attempt to combine the Lego Technic Off-Roader (#8297) and Lego Mindstorms NXT kit and thus motorizing the functions.
To summarize the project it ended up having these features:
- NXT controlled steering
- NXT controlled rear wheel drive
- NXT controlled suspension height
- PF motorized winch and lights (on-board PF power box)
- 2 step manual transition
- All original features (V8 engine, doors and such)
- Almost no changes to the visual design
The electronics used:
- NXT microcomputer
- 3 NXT motors
- PF power box
- 1 small PF motor
- 1 PF switch
- 1 pair of PF lights
I ended up getting bored and stopped working on it so there is still some rough edges, but in general I’m pretty satisfied the result.
The following text is an old description of the project I found on my HDD:
First step was to remove the designed parts carefully and making notice of where they were connected to the chassis in order to add it later when the NXT is added.
The original model has one motor connected to two functions by a manual gear switch. Since this wouldn’t work with a NXT, all the mechanics had to be changed.
Therefore, everything else than the fundamental chassis was ripped out.
Later on, some parts of the chassis was also changed to fit everything together.
The Power functions was preserved. The small motor was placed in the very front, directly connected to the winch. The battery box is also placed in the front together with the electrical switch.
In the back where the battery box had been, the NXT is placed with two NXT motors underneath. The last NXT motor is placed under the seats.
A manual 2 speed transmission was added in the bottom. The original differential was replaced with the older type differential because the new one isn’t strong enough and the gears would slip under the pressure.
There where almost no changes to the original design, so it looks very much like the original model other than the NXT parts which are visible.
I got bored in the end and finished the construction a bit too fast and didn’t fix the 2 step transmission. It sometimes under huge pressure jump out of gear. It should be easily fixed with a rubberband or something similar which can hold it in place.