| ??? 05/05/09 08:26 Read: times |
#165060 - Insufficient! Responding to: ???'s previous message |
Per and Andy both said:
how will you calibrate it and use it with different color filters, to measure the amount of red, green, blue, or the amount of light at a very specific wavelength? Jecksons Ben said:
With common red 5mm led. But that will only tell you its response to the particular colour (wavelength) of the specific LED that you use! You said you want to detect different colours - so, again, how are you going to calibrate the LDR's response over the entire spectrum of interest? Again, have you looked at the devices that come ready-calibrated and are specifically designed for this purpose? |
