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11

I've found a solution that's actually pretty easy, but took some time to try out because I don't have the parts I need at hand. The solution Input from motor(s). A differential to split up the input-movement to two shafts. Since I don't have a Technic Gear Differential at hand I had to built my own for the test. One of the differential-outputs becomes our "...


5

I've seen this done in a GBC module that counts the balls that pass by. It worked with scales that eventually tipped over, each scale representing a decimal of the total number of balls that passed by. Can't exactly find the GBC module but found this clock from jkbrickworks that uses the same principle.


5

There is an interesting discussion on this on the lejos.sourceforge.io forum. the calibration values for the NXT sensor are set in the factory and seem to be different for each sensor (which implies that there must be a reasonable amount of variation between different sensors). On the NXT the RGB values are true raw values and the calibration adjustments ...


5

The ultrasonic cannot detect the color of objects. It's just to detect the distance between the sensor and an object in it's line of sight. To find objects in the surrounding area of your robot you have to look all around. This is simply done by rotating your robot or your sensor. When you measure a distance in a certain range (best results between aprox. ...


3

On LEGO's customer service under "Bricks & Pieces" (not sure what it's called in english the page is in danish here, and I couldn't quickly see a way to change that) you can buy parts. If I search for part id 6261264 (an orange "BALL Ø14,2"), it "only" costs DKK 4.94 which is ~$0.76, quite a bit less than $1, and shipping is usually quite cheap from ...


3

You should research if there is an RLUG (Recognized Lego users group) active near where you live. These are groups of LEGO fans for which the LEGO company provides various levels of support. Often they have the means to buy LEGO directly from the LEGO company through the LUGBULK program. The program allows the members of the LUG to buy LEGO in bulk ...


2

I got them from here; https://pv-productions.com/product/lego-gbc-balls/ work perfect in my gbc modules. Also they have very cool glow in the dark gbc balls


2

I don't know if this is practical, and I can't test it as I don't have enough compatible balls to build GBC type mechanisms, but what comes to mind is: Have the balls run down a trough. The trough ends in a segment of trough which is 10 balls long and pivoted about the long axis. The triggering ball causes the trough to spin about that axis, dumping the ...


2

Regarding the white square on the ground, the robot can not sense this using the ultrasonic sensor. This is because the ultrasonic sensor uses echolocation to navigate (hence the name "ultrasonic") If there is a white square on the ground such as a piece of paper which is essentially 2 dimensional, the sensor will not 'notice' the square. Try another method, ...


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