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Xtase & Androids

LEGO TECHNIC 42056 - PORSCHE 911 GT3 RS (4-1)

4 - The way

1 - Main motorization

I found on youtube a video of a guy who motorized the set : https://www.youtube.com/watch?v=87gg9RwA3EU (LEGO Technic Porsche GT3 RS (42056) with Power Functions & Remote Control ) but I think he bypassed the gearbox,

so I made my own motorization using two XL motors (Power Function) too, but in a different way....

disassembling back of the car
disassembling back of the car

@ the begining : have to disassemble the back of the car body

Then I could see the "fake" LEGO motor, a bit hard to remove ...Then I could see the "fake" LEGO motor, a bit hard to remove ...

Then I could see the "fake" LEGO motor, a bit hard to remove ...

preparing the new propulsion modulepreparing the new propulsion modulepreparing the new propulsion module

preparing the new propulsion module

Fixating itFixating itFixating it

Fixating it

modifying some body partsmodifying some body partsmodifying some body parts

modifying some body parts

Then re-mounting the body back elementsThen re-mounting the body back elementsThen re-mounting the body back elements

Then re-mounting the body back elements

I'm sorry to not have made the whole MOD documentation but I fine-tuned while building/testing it, hope the photograph & a bit of imagination will allow you to make something better than me :)

For information : my car is now 1 brick longer than the original, so I had to adapt some bloc hooks...

The efficiency of my MOD is limited but I can use the gearbox on sereval ratios, I think it should be better if I could lock more my motor bloc.

Anyway, it works...

the L298 dual H bridge
the L298 dual H bridge

next step is : plug my motors to the L298 dual H bridge controller ...

As each L298 boards are brushed differently, I let you google your own model.

But for the most number of those : use Vcc to 9v, GND to GND, +5 to regulated +5 (to let you use PWM signal ~as voltage comparator) then SEL 1&2 to control the motor direction & brake + PWM line for the speed of motor (0 to 255).

Here's a try with an Arduino micro & a smaller LEGO motor

LEGO wire
LEGO wire

How to wire a LEGO Power Function Motor :

keep only the two middle wires for the motor : it can be used in both direction.

keep only two external wires for the power supply (on another cable !).

controller + car
controller + car

putting all together : contoller + Hbridge + battery + motors... ( 1st try ;) )

the LEGO battery box
the LEGO battery box

Finally, I removed the passenger chair to use the original LEGO battery box...

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