If you have limited gears, then drive one wheel, have an idler wheel and a caster or simple skid arrangement. If you can build a differential, then drive two wheels with the motor. One motor and a caster wheel will give you two degrees of movement but will not be steerable. Here a good WeDo 2.0 model with steering:
#Brick rigs cars update#
UPDATE 2: Got a nice suggestion at Eurobricks forum: I wonder if experienced LEGO builders can propose a better vehicle out of WeDo 2.0 parts than mine:Īnd I feel that my Scratch program can be improved too, since it is not very responsive to user input (when touching the 4 green arrows): There is too much friction - on the axles of all 3 wheels and on the rubber band. I have followed Aaganrmu's suggestion (thank you) and have tried to build a simple vehicle using ratchet instead of caster wheel: The caster wheel would roll straight, when the vehicle drives forwards.īut when driving backwards, it would snap to a certain angle.įound a picture for such a caster wheel in the LEGO Technic Idea Book by Mr. I am thinking of having 2 wheels with wide tires in front the vehicle, connected to the motor.Īnd having a single caster wheel with narrow tire at the back of the vehicle, not connected to the motor. In WeDo 2.0 set there is only 1 motor, which can be remotely switched on and off by using the iPad app (by writing a Scratch program).Īlso motor rotating direction can be toggled remotely.Īs an inexperienced LEGO builder I wonder if it is possible to build a remote-controlled vehicle out of 280 WeDo 2.0 pieces, which would be steered by changing the motor rotation direction.
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