Recently, Dan gave E11 the assignment to figure out how to use the light sensors with the nxt kit to measure the velocity of a marble going down the track. If you’ve been a reader for a while, then you might remember we took this on without the sensors
earlier this year. E11 rose to the challenge, with some “encouragement” here and there and here are the results.
The trap- E11 designed it so that the sensors could measure the speed of the marble going through
close up of the read out- recorded in inches per second and miles per hour. Cool. here they are showing a read out- the highest velocity recorded was 9 miles per hour
Basically, the first light sensor will sense when the marble has gone by it which starts a timer. The second sensor will know when the marble goes by it too stopping the timer and reading its value (as summarized by E11 himself).
Stay tuned for more NXT challenges. Our new FLL (First LEGO League) season is underway and the team has met once and will meet again on Friday.