Calibrating the
NXT Light Sensor
Absolute vs Calibrated Scales
0
Black = 315
550 = White
Can’t see or detect it!
Min = 0%
1023
Can’t see or detect it!
Max = 100%
The Light Sensor detects absolute
light intensity, not color
You
The Robot can’t see what you see!
The software works in % of Max
Robot
Set Max and Min to help detect lines!
Use Tools/Calibrate Sensor
to read light intensity values on the mat
Which color differences can’t the Robot see?
555
534
550
540
421
315
401
444
523
532
388
548
365
315
356
What different
How much does the
colors are similar?
same color change?
305
356
344
313
528
348