Fischertechnik 3 Way Switch

Introduction: Fischertechnik 3 Way Switch

How to create a fischertechnik 3 Way Switch!

I play with different educational manipulatives for a living. (Visit Over the years I have built different themed models using all sorts of toys. This instructable will describe how to create a fischertechnik 3 Way Switch.

This is a cool assembly. Pushing down on the large pulley will engage a touch sensor. Turning the pulley in either direction will engage separate touch sensors. This assembly has some nice control applications.

Disclosure: When I attended the ft fan Convention in Moershausen (Sept 2008) I ran into a fellow who had this assembly as part of his model. This is a slightly different version of it, but I want to credit Kehrblech for the model. (You can see his model here: ).

See my ft-ible about Moershausen here:

Note: The CAD looking images were generated by LDraw/MLCAD and a fischertechnik
elements library.

Step 1: Gather Elements:

You will need to gather your elements. The fischertechnik elements are available
from a range of kits available from ebay, Craig's List, or fischertechnik retailers. Elements can be purchased individually from

The List:

1 Large Pulley 60
1 Hub Nut
1 Link 15
1 Spring Cam
1 Building Block 15 with Bore
1 Bottom Plate 30x90
1 Building Block 30
1 Building Block 15
1 Flat Hub Collet
1 Clip Axle 45
1 Crank Shaft
1 Building Block 5 with two Pins
2 Building Block 7.5
3 Mini Switch

Step 2: Construct Switch

The following steps demonstrate how to create the assembly.

This assembly can be integrated into a wide range of robotic devices!

Happy Yule and Merry Christmas!

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    Question 3 years ago on Introduction

    You write that you use LDraw and a Fischertechnik library. But I can not find any lib. Where I can download the library with FT-Parts?


    7 years ago

    what application is used to create 3D design fischertechnik ?