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Questions tagged [balls]

For question-related to balls in LEGO sets.

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5 votes
4 answers

Where to get bulk GBC soccer balls?

I am running a middle school robotics club, and this year we are focusing on building a Great Ball Contraption. One problem I'm having is acquiring the balls. On BrickLink, the discontinued soccer ...
Jeremy's user avatar
  • 151
6 votes
2 answers

How do you make a triggered counted ball drop?

Is there any solution on making a drop of a counted number of balls when one ball passes through the system? For example: One ball falls into a hole on the top and ten balls (plus/minus (not ...
uncanny's user avatar
  • 61
6 votes
1 answer

Colored balls detectable by EV3 color sensor

I'm looking for large balls in standard Lego colors that are detectable by the EV3 color scanner. So black, white, green, brown, yellow and blue and between 5 and 10 cm. I'm aware of the Duplo balls:...
Michael Verschaeve's user avatar
7 votes
2 answers

Ultrasonic problems with the red and blue balls?

I'm still new to NXT, I try to make the robot locate a ball using the ultrasonic sensor, while there I should be in a square area marked by white color. How can I make the robot locate the object (by ...
Tankid's user avatar
  • 71
13 votes
1 answer

Mechanical auto-unblocking mechanism

I have a GBC module1 which is quite simple but blocks regularly because a ball happens to be at just the wrong place at the wrong moment. Per se, it's not a problem as a Technic Gear 24 Tooth Clutch ...
Joubarc's user avatar
  • 21.1k