Hi all,
The TSL2561 is nearly the light sensor I am looking for: I2C output, wide range of sensitivity, calibrated, useable for the visual spectrum and available on a breakout board. The "counts" can be calculated to give Lux readings, the datasheet contains the formula.
a) Is there a formula to transform the "counts" into µW/cm2? Or
b) Is there a sensor which outputs µW/m2 or similar directly? Or
c) Can I calculate µW/cm2 from the Lux value? Since I don't have monochromatic light of 555 nm, but (varying) daylight, this is not trivial.
Thanks for sharing your ideas!
-richard
The TSL2561 is nearly the light sensor I am looking for: I2C output, wide range of sensitivity, calibrated, useable for the visual spectrum and available on a breakout board. The "counts" can be calculated to give Lux readings, the datasheet contains the formula.
a) Is there a formula to transform the "counts" into µW/cm2? Or
b) Is there a sensor which outputs µW/m2 or similar directly? Or
c) Can I calculate µW/cm2 from the Lux value? Since I don't have monochromatic light of 555 nm, but (varying) daylight, this is not trivial.
Thanks for sharing your ideas!
-richard