It's in the docs on page 1, although not spelled out explicitly:
"Generates 24-bit color using onboard RGB LED."
This means 255, 255, 255 for the RGB components. More to the point, however, and for the most accurate measurements, you will want to do a white balance and rescale your readings in such a way that your white specimen scales to 255, 255, 255 instead of something less.
Please pardon the delay: it's been while since I've looked at the ColorPAL's firmware.
The ADC in the AVR micro used in the ColorPAL has ten bits of resolution. So the maximum value you can ever get for each color is 1023, or 3FF hex. I think you would have to shine a flashlight into the module or hold it up to the sun to get such a reading, though -- at least at the low-sensitivity setting. In normal use, the readings should be much lower. At the high-sensitivity setting, a saturated reading of 1023 would be more common.
brandan
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"Generates 24-bit color using onboard RGB LED."
This means 255, 255, 255 for the RGB components. More to the point, however, and for the most accurate measurements, you will want to do a white balance and rescale your readings in such a way that your white specimen scales to 255, 255, 255 instead of something less.
-Phil
-Phil
The ADC in the AVR micro used in the ColorPAL has ten bits of resolution. So the maximum value you can ever get for each color is 1023, or 3FF hex. I think you would have to shine a flashlight into the module or hold it up to the sun to get such a reading, though -- at least at the low-sensitivity setting. In normal use, the readings should be much lower. At the high-sensitivity setting, a saturated reading of 1023 would be more common.
What is the maximum that you've seen?
-Phil